--- _id: '25062' author: - first_name: Ricardo full_name: Tischendorf, Ricardo id: '67002' last_name: Tischendorf - first_name: Hans-Joachim full_name: Schmid, Hans-Joachim id: '464' last_name: Schmid - first_name: M. full_name: Bieber, M. last_name: Bieber - first_name: M. full_name: Reddemann , M. last_name: 'Reddemann ' - first_name: R. full_name: Kneer, R. last_name: Kneer - first_name: F. full_name: Fröde, F. last_name: Fröde - first_name: T. full_name: Grenga, T. last_name: Grenga - first_name: H. full_name: Pitsch, H. last_name: Pitsch citation: ama: 'Tischendorf R, Schmid H-J, Bieber M, et al. Influence of differing nozzle configurations on the final particle characteristics and particle structure evolution in spray flames. In: 4th International Symposium Gas‐Phase Synthesis of Functional Nanomaterials; 2020.' apa: Tischendorf, R., Schmid, H.-J., Bieber, M., Reddemann , M., Kneer, R., Fröde, F., Grenga, T., & Pitsch, H. (2020). Influence of differing nozzle configurations on the final particle characteristics and particle structure evolution in spray flames. 4th International Symposium Gas‐Phase Synthesis of Functional Nanomaterials, Duisburg. bibtex: '@inproceedings{Tischendorf_Schmid_Bieber_Reddemann _Kneer_Fröde_Grenga_Pitsch_2020, title={Influence of differing nozzle configurations on the final particle characteristics and particle structure evolution in spray flames}, publisher={4th International Symposium Gas‐Phase Synthesis of Functional Nanomaterials}, author={Tischendorf, Ricardo and Schmid, Hans-Joachim and Bieber, M. and Reddemann , M. and Kneer, R. and Fröde, F. and Grenga, T. and Pitsch, H.}, year={2020} }' chicago: Tischendorf, Ricardo, Hans-Joachim Schmid, M. Bieber, M. Reddemann , R. Kneer, F. Fröde, T. Grenga, and H. Pitsch. “Influence of Differing Nozzle Configurations on the Final Particle Characteristics and Particle Structure Evolution in Spray Flames.” 4th International Symposium Gas‐Phase Synthesis of Functional Nanomaterials, 2020. ieee: R. Tischendorf et al., “Influence of differing nozzle configurations on the final particle characteristics and particle structure evolution in spray flames,” presented at the 4th International Symposium Gas‐Phase Synthesis of Functional Nanomaterials, Duisburg, 2020. mla: Tischendorf, Ricardo, et al. Influence of Differing Nozzle Configurations on the Final Particle Characteristics and Particle Structure Evolution in Spray Flames. 4th International Symposium Gas‐Phase Synthesis of Functional Nanomaterials, 2020. short: 'R. Tischendorf, H.-J. Schmid, M. Bieber, M. Reddemann , R. Kneer, F. Fröde, T. Grenga, H. Pitsch, in: 4th International Symposium Gas‐Phase Synthesis of Functional Nanomaterials, 2020.' conference: end_date: 2020-10-09 location: Duisburg name: 4th International Symposium Gas‐Phase Synthesis of Functional Nanomaterials start_date: 2020-10-06 date_created: 2021-09-28T09:16:02Z date_updated: 2022-03-16T21:51:11Z ddc: - '620' file: - access_level: closed content_type: application/pdf creator: ricardo date_created: 2021-09-28T09:14:20Z date_updated: 2021-09-28T09:14:20Z file_id: '25063' file_name: Poster.pdf file_size: 2148920 relation: main_file success: 1 file_date_updated: 2021-09-28T09:14:20Z has_accepted_license: '1' language: - iso: eng publisher: 4th International Symposium Gas‐Phase Synthesis of Functional Nanomaterials status: public title: Influence of differing nozzle configurations on the final particle characteristics and particle structure evolution in spray flames type: conference_abstract user_id: '67002' year: '2020' ... --- _id: '21949' abstract: - lang: eng text: This paper presents the results of an interlaboratory study of the rheological properties of cement paste and ultrasound gel as reference substance. The goal was to quantify the comparability and reproducibility of measurements of the Bingham parameters yield stress and plastic viscosity when measured on one specific paste composition and one particular ultrasound gel in different laboratories using different rheometers and measurement geometries. The procedures for both in preparing the cement paste and carrying out the rheological measurements on cement paste and ultrasound gel were carefully defined for all of the study’s participants. Different conversion schemes for comparing the results obtained with the different measurement setups are presented here and critically discussed. The procedure proposed in this paper ensured a reasonable comparability of the results with a coefficient of variation for the yield stress of 27% and for the plastic viscosity of 24%, despite the individual measurement series’ having been performed in different labs with different rheometers and measurement geometries. article_type: original author: - first_name: Michael full_name: Haist, Michael last_name: Haist - first_name: Julian full_name: Link, Julian last_name: Link - first_name: David full_name: Nicia, David last_name: Nicia - first_name: Sarah full_name: Leinitz, Sarah last_name: Leinitz - first_name: Christian full_name: Baumert, Christian last_name: Baumert - first_name: Tabea full_name: von Bronk, Tabea last_name: von Bronk - first_name: Dario full_name: Cotardo, Dario last_name: Cotardo - first_name: Mahmoud full_name: Eslami Pirharati, Mahmoud last_name: Eslami Pirharati - first_name: Shirin full_name: Fataei, Shirin last_name: Fataei - first_name: Harald full_name: Garrecht, Harald last_name: Garrecht - first_name: Christoph full_name: Gehlen, Christoph last_name: Gehlen - first_name: Inga full_name: Hauschildt, Inga last_name: Hauschildt - first_name: Irina full_name: Ivanova, Irina last_name: Ivanova - first_name: Steffen full_name: Jesinghausen, Steffen id: '3959' last_name: Jesinghausen orcid: https://orcid.org/0000-0003-2611-5298 - first_name: Christopher full_name: Klein, Christopher last_name: Klein - first_name: Hans-W. full_name: Krauss, Hans-W. last_name: Krauss - first_name: Ludger full_name: Lohaus, Ludger last_name: Lohaus - first_name: Dirk full_name: Lowke, Dirk last_name: Lowke - first_name: Oliver full_name: Mazanec, Oliver last_name: Mazanec - first_name: Sebastian full_name: Pawelczyk, Sebastian last_name: Pawelczyk - first_name: Ursula full_name: Pott, Ursula last_name: Pott - first_name: Nonkululeko W. full_name: Radebe, Nonkululeko W. last_name: Radebe - first_name: Joachim Jürgen full_name: Riedmiller, Joachim Jürgen last_name: Riedmiller - first_name: Hans-Joachim full_name: Schmid, Hans-Joachim id: '464' last_name: Schmid - first_name: Wolfram full_name: Schmidt, Wolfram last_name: Schmidt - first_name: Egor full_name: Secrieru, Egor last_name: Secrieru - first_name: Dietmar full_name: Stephan, Dietmar last_name: Stephan - first_name: Mareike full_name: Thiedeitz, Mareike last_name: Thiedeitz - first_name: Manfred full_name: Wilhelm, Manfred last_name: Wilhelm - first_name: Viktor full_name: Mechtcherine, Viktor last_name: Mechtcherine citation: ama: 'Haist M, Link J, Nicia D, et al. Interlaboratory study on rheological properties of cement pastes and reference substances: comparability of measurements performed with different rheometers and measurement geometries. Materials and Structures. Published online 2020. doi:10.1617/s11527-020-01477-w' apa: 'Haist, M., Link, J., Nicia, D., Leinitz, S., Baumert, C., von Bronk, T., Cotardo, D., Eslami Pirharati, M., Fataei, S., Garrecht, H., Gehlen, C., Hauschildt, I., Ivanova, I., Jesinghausen, S., Klein, C., Krauss, H.-W., Lohaus, L., Lowke, D., Mazanec, O., … Mechtcherine, V. (2020). Interlaboratory study on rheological properties of cement pastes and reference substances: comparability of measurements performed with different rheometers and measurement geometries. Materials and Structures. https://doi.org/10.1617/s11527-020-01477-w' bibtex: '@article{Haist_Link_Nicia_Leinitz_Baumert_von Bronk_Cotardo_Eslami Pirharati_Fataei_Garrecht_et al._2020, title={Interlaboratory study on rheological properties of cement pastes and reference substances: comparability of measurements performed with different rheometers and measurement geometries}, DOI={10.1617/s11527-020-01477-w}, journal={Materials and Structures}, author={Haist, Michael and Link, Julian and Nicia, David and Leinitz, Sarah and Baumert, Christian and von Bronk, Tabea and Cotardo, Dario and Eslami Pirharati, Mahmoud and Fataei, Shirin and Garrecht, Harald and et al.}, year={2020} }' chicago: 'Haist, Michael, Julian Link, David Nicia, Sarah Leinitz, Christian Baumert, Tabea von Bronk, Dario Cotardo, et al. “Interlaboratory Study on Rheological Properties of Cement Pastes and Reference Substances: Comparability of Measurements Performed with Different Rheometers and Measurement Geometries.” Materials and Structures, 2020. https://doi.org/10.1617/s11527-020-01477-w.' ieee: 'M. Haist et al., “Interlaboratory study on rheological properties of cement pastes and reference substances: comparability of measurements performed with different rheometers and measurement geometries,” Materials and Structures, 2020, doi: 10.1617/s11527-020-01477-w.' mla: 'Haist, Michael, et al. “Interlaboratory Study on Rheological Properties of Cement Pastes and Reference Substances: Comparability of Measurements Performed with Different Rheometers and Measurement Geometries.” Materials and Structures, 2020, doi:10.1617/s11527-020-01477-w.' short: M. Haist, J. Link, D. Nicia, S. Leinitz, C. Baumert, T. von Bronk, D. Cotardo, M. Eslami Pirharati, S. Fataei, H. Garrecht, C. Gehlen, I. Hauschildt, I. Ivanova, S. Jesinghausen, C. Klein, H.-W. Krauss, L. Lohaus, D. Lowke, O. Mazanec, S. Pawelczyk, U. Pott, N.W. Radebe, J.J. Riedmiller, H.-J. Schmid, W. Schmidt, E. Secrieru, D. Stephan, M. Thiedeitz, M. Wilhelm, V. Mechtcherine, Materials and Structures (2020). date_created: 2021-05-04T08:49:44Z date_updated: 2023-01-17T07:42:21Z department: - _id: '150' doi: 10.1617/s11527-020-01477-w keyword: - Rheology - Wall Slip - Slip - apparent slip - suspension - cement - concrete language: - iso: eng main_file_link: - open_access: '1' url: https://link.springer.com/article/10.1617/s11527-020-01477-w oa: '1' publication: Materials and Structures publication_identifier: issn: - 1359-5997 - 1871-6873 publication_status: published quality_controlled: '1' status: public title: 'Interlaboratory study on rheological properties of cement pastes and reference substances: comparability of measurements performed with different rheometers and measurement geometries' type: journal_article user_id: '3959' year: '2020' ... --- _id: '21948' abstract: - lang: eng text: Since suspensions (e.g., in food, cement, or cosmetics industries) tend to show wall slip, the application of structured measuring surfaces in rheometers is widespread. Usually, for parallel-plate geometries, the tip-to-tip distance is used for calculation of absolute rheological values, which implies that there is no flow behind this distance. However, several studies show that this is not true. Therefore, the measuring gap needs to be corrected by adding the effective gap extension δ to the prescribed gap height H in order to obtain absolute rheological properties. In this paper, we determine the effective gap extension δ for different structures and fluids (Newtonian, shear thinning, and model suspensions that can be adjusted to the behavior of real fluids) and compare the corrected values to reference data. We observe that for Newtonian fluids a gap- and material-independent correction function can be derived for every measuring system, which is also applicable to suspensions, but not to shear thinning fluids. Since this relation appears to be mainly dependent on the characteristics of flow behaviour, we show that the calibration of structured measuring systems is possible with Newtonian fluids and then can be transferred to suspensions up to a certain particle content. article_number: '467' article_type: original author: - first_name: Sebastian full_name: Pawelczyk, Sebastian id: '38243' last_name: Pawelczyk - first_name: Marieluise full_name: Kniepkamp, Marieluise last_name: Kniepkamp - first_name: Steffen full_name: Jesinghausen, Steffen id: '3959' last_name: Jesinghausen orcid: https://orcid.org/0000-0003-2611-5298 - first_name: Hans-Joachim full_name: Schmid, Hans-Joachim id: '464' last_name: Schmid citation: ama: 'Pawelczyk S, Kniepkamp M, Jesinghausen S, Schmid H-J. Absolute Rheological Measurements of Model Suspensions: Influence and Correction of Wall Slip Prevention Measures. Materials. Published online 2020. doi:10.3390/ma13020467' apa: 'Pawelczyk, S., Kniepkamp, M., Jesinghausen, S., & Schmid, H.-J. (2020). Absolute Rheological Measurements of Model Suspensions: Influence and Correction of Wall Slip Prevention Measures. Materials, Article 467. https://doi.org/10.3390/ma13020467' bibtex: '@article{Pawelczyk_Kniepkamp_Jesinghausen_Schmid_2020, title={Absolute Rheological Measurements of Model Suspensions: Influence and Correction of Wall Slip Prevention Measures}, DOI={10.3390/ma13020467}, number={467}, journal={Materials}, author={Pawelczyk, Sebastian and Kniepkamp, Marieluise and Jesinghausen, Steffen and Schmid, Hans-Joachim}, year={2020} }' chicago: 'Pawelczyk, Sebastian, Marieluise Kniepkamp, Steffen Jesinghausen, and Hans-Joachim Schmid. “Absolute Rheological Measurements of Model Suspensions: Influence and Correction of Wall Slip Prevention Measures.” Materials, 2020. https://doi.org/10.3390/ma13020467.' ieee: 'S. Pawelczyk, M. Kniepkamp, S. Jesinghausen, and H.-J. Schmid, “Absolute Rheological Measurements of Model Suspensions: Influence and Correction of Wall Slip Prevention Measures,” Materials, Art. no. 467, 2020, doi: 10.3390/ma13020467.' mla: 'Pawelczyk, Sebastian, et al. “Absolute Rheological Measurements of Model Suspensions: Influence and Correction of Wall Slip Prevention Measures.” Materials, 467, 2020, doi:10.3390/ma13020467.' short: S. Pawelczyk, M. Kniepkamp, S. Jesinghausen, H.-J. Schmid, Materials (2020). date_created: 2021-05-04T08:48:48Z date_updated: 2023-01-17T07:45:59Z department: - _id: '150' doi: 10.3390/ma13020467 keyword: - wall slip prevention - effective gap height - parallel-plate system - structured surfaces - model suspensions - cement paste - fresh concrete language: - iso: eng main_file_link: - open_access: '1' url: https://www.mdpi.com/1996-1944/13/2/467 oa: '1' publication: Materials publication_identifier: issn: - 1996-1944 publication_status: published quality_controlled: '1' status: public title: 'Absolute Rheological Measurements of Model Suspensions: Influence and Correction of Wall Slip Prevention Measures' type: journal_article user_id: '3959' year: '2020' ... --- _id: '24628' author: - first_name: Dennis full_name: Menge, Dennis id: '29240' last_name: Menge - first_name: Rolf full_name: Walter, Rolf last_name: Walter - first_name: Hans-Joachim full_name: Schmid, Hans-Joachim id: '464' last_name: Schmid - first_name: Ulf Paul full_name: Breuer, Ulf Paul last_name: Breuer citation: ama: Menge D, Walter R, Schmid H-J, Breuer UP. FVA-Nr. 813 I - Generative Verfahren zur Herstellung von Polymerbauteilen. Vol 1338.; 2019. apa: Menge, D., Walter, R., Schmid, H.-J., & Breuer, U. P. (2019). FVA-Nr. 813 I - Generative Verfahren zur Herstellung von Polymerbauteilen (Vol. 1338). bibtex: '@book{Menge_Walter_Schmid_Breuer_2019, place={Frankfurt}, series={FVA-Heft}, title={FVA-Nr. 813 I - Generative Verfahren zur Herstellung von Polymerbauteilen}, volume={1338}, author={Menge, Dennis and Walter, Rolf and Schmid, Hans-Joachim and Breuer, Ulf Paul}, year={2019}, collection={FVA-Heft} }' chicago: Menge, Dennis, Rolf Walter, Hans-Joachim Schmid, and Ulf Paul Breuer. FVA-Nr. 813 I - Generative Verfahren zur Herstellung von Polymerbauteilen. Vol. 1338. FVA-Heft. Frankfurt, 2019. ieee: D. Menge, R. Walter, H.-J. Schmid, and U. P. Breuer, FVA-Nr. 813 I - Generative Verfahren zur Herstellung von Polymerbauteilen, vol. 1338. Frankfurt, 2019. mla: Menge, Dennis, et al. FVA-Nr. 813 I - Generative Verfahren zur Herstellung von Polymerbauteilen. 2019. short: D. Menge, R. Walter, H.-J. Schmid, U.P. Breuer, FVA-Nr. 813 I - Generative Verfahren zur Herstellung von Polymerbauteilen, Frankfurt, 2019. date_created: 2021-09-17T09:31:20Z date_updated: 2022-01-06T06:56:31Z department: - _id: '150' - _id: '219' - _id: '624' intvolume: ' 1338' language: - iso: ger page: '77' place: Frankfurt series_title: FVA-Heft status: public title: FVA-Nr. 813 I - Generative Verfahren zur Herstellung von Polymerbauteilen type: report user_id: '29240' volume: 1338 year: '2019' ... --- _id: '26098' abstract: - lang: eng text: Since, in the presence of humidity the inter-particle processes are dominated by capillary forces, a fundamental understanding of the water adsorption and the capillary bridge formation is very important. However, the adsorbed water structure and thus the capillary bridge formation is influenced by various parameters like the particle morphology (e.g. particle size, roughness) as well as the surface chemistry (surface energy, adsorbate structure) and therefore needs to be analyzed on a submicroscopic or even molecular basis. A multi-scale approach ranging from experiments on an individual particle level (AFM and liquid bridge simulation) and investigations on small particle ensembles (combined QCM-D/FTIR) up to macroscopic description of bulk behavior is presented in this chapter. In this context, the combined in situ QCM-D/FTIR experiments are bridging the gap between experiments on an individual particle level and macroscopic bulk behavior. Variation of surface chemistry by means of adsorption of functional organic molecules allows for the correlation of macroscopic particle behavior to nanoscopic effects like the presence and structure of adsorbate layers as well as the formation of capillary bridges while keeping the disperse properties constant. Besides extensive experimental work, simulations of capillary bridges formed by condensation from humid air are presented. It is clearly shown that well known approximations which have been introduced for micron-sized particles are not valid any more for nano-scaled particles. The forces between nanoparticles by static liquid bridges and their dependency on particle size, contact angle, humidity and interparticle distance are discussed in detail. Furthermore, capillary forces during separation of particles are studied thoroughly and a constitutive law based on a contact stiffness allows the transfer to DEM simulations of wet powders. Finally, it is demonstrated by comparison to Molecular Dynamics simulations, that the used continuum approach to simulate capillary bridges might even be used down to particle sizes of a few nanometers, if some additional effects are considered correctly. author: - first_name: Hans-Joachim full_name: Schmid, Hans-Joachim id: '464' last_name: Schmid - first_name: Guido full_name: Grundmeier, Guido id: '194' last_name: Grundmeier - first_name: Michael full_name: Dörmann, Michael last_name: Dörmann - first_name: Alejandro González full_name: Orive, Alejandro González last_name: Orive - first_name: Teresa full_name: de los Arcos, Teresa last_name: de los Arcos - first_name: Boray full_name: Torun, Boray last_name: Torun citation: ama: 'Schmid H-J, Grundmeier G, Dörmann M, Orive AG, de los Arcos T, Torun B. Understanding and Manipulation of Nanoparticle Contact Forces by Capillary Bridges. In: Particles in Contact. ; 2019. doi:10.1007/978-3-030-15899-6_2' apa: Schmid, H.-J., Grundmeier, G., Dörmann, M., Orive, A. G., de los Arcos, T., & Torun, B. (2019). Understanding and Manipulation of Nanoparticle Contact Forces by Capillary Bridges. In Particles in Contact. https://doi.org/10.1007/978-3-030-15899-6_2 bibtex: '@inbook{Schmid_Grundmeier_Dörmann_Orive_de los Arcos_Torun_2019, place={Cham}, title={Understanding and Manipulation of Nanoparticle Contact Forces by Capillary Bridges}, DOI={10.1007/978-3-030-15899-6_2}, booktitle={Particles in Contact}, author={Schmid, Hans-Joachim and Grundmeier, Guido and Dörmann, Michael and Orive, Alejandro González and de los Arcos, Teresa and Torun, Boray}, year={2019} }' chicago: Schmid, Hans-Joachim, Guido Grundmeier, Michael Dörmann, Alejandro González Orive, Teresa de los Arcos, and Boray Torun. “Understanding and Manipulation of Nanoparticle Contact Forces by Capillary Bridges.” In Particles in Contact. Cham, 2019. https://doi.org/10.1007/978-3-030-15899-6_2. ieee: H.-J. Schmid, G. Grundmeier, M. Dörmann, A. G. Orive, T. de los Arcos, and B. Torun, “Understanding and Manipulation of Nanoparticle Contact Forces by Capillary Bridges,” in Particles in Contact, Cham, 2019. mla: Schmid, Hans-Joachim, et al. “Understanding and Manipulation of Nanoparticle Contact Forces by Capillary Bridges.” Particles in Contact, 2019, doi:10.1007/978-3-030-15899-6_2. short: 'H.-J. Schmid, G. Grundmeier, M. Dörmann, A.G. Orive, T. de los Arcos, B. Torun, in: Particles in Contact, Cham, 2019.' date_created: 2021-10-13T12:30:37Z date_updated: 2022-01-06T06:57:16Z doi: 10.1007/978-3-030-15899-6_2 language: - iso: eng place: Cham publication: Particles in Contact publication_status: published status: public title: Understanding and Manipulation of Nanoparticle Contact Forces by Capillary Bridges type: book_chapter user_id: '70093' year: '2019' ... --- _id: '22198' abstract: - lang: eng text: Zuverlässige, wiederholbare Bauteileigenschaften sind unabdingbar um das Herstellungsverfahren Polymer Lasersintern im industriellen Prozess-Portfolio vieler Firmen aufnehmen zu können. Einige Unternehmen und Institute haben sich daher in jüngster Zeit mit dem Thema der reproduzierbaren Bauteileigenschaften beschäftigt. Mit der hier vorgestellten und angewandten Methodik wird nicht nur der Prozessablauf vom Bauteil bis zu Nachbearbeitung betrachtet, sondern auch die Maschinenperformance in einem Ringversuch und über einen längeren Zeitraum geprüft. Rückgrat dieser Untersuchung bildet hierbei der aus der Six Sigma Lehre stammende DMAIC (Define - Measure - Analyse - Improve - Control) Verbesserungszyklus. Hierfür wird ein Standard-Prozess definiert. Diesem folgend werden die für die Industrie oder den Anwender interessanten Messungen aufgenommen und analysiert. Anschließend wird der Prozess sowie die Messmethodik optimiert und auch Kontrollmethoden definiert. Für die Anwendung der entwickelten Methodik wird exemplarisch der Maschinentyp EOS P396 mit PA2200 untersucht. Daten für die Bestimmung der Mechanik, der Optik und der Haptik sowie für die Dimensionen und die Bauteildichte werden als Qualitätskriterium aufgenommen und über einen längeren Zeitraum analysiert. Weiteres Ziel ist es, den Messaufwand zu reduzieren und die Qualitätssicherung im Serienbtrieb zu gewährleisten. author: - first_name: Sven Helge full_name: Klippstein, Sven Helge id: '71545' last_name: Klippstein - first_name: Hans-Joachim full_name: Schmid, Hans-Joachim id: '464' last_name: Schmid citation: ama: 'Klippstein SH, Schmid H-J. Methodik zur Qualifizierung des Lasersinter Prozesses für die Serienfertigung. In: Proceedings of the 16th Rapid.Tech Conference. ; 2019. doi:10.3139/9783446462441.025' apa: Klippstein, S. H., & Schmid, H.-J. (2019). Methodik zur Qualifizierung des Lasersinter Prozesses für die Serienfertigung. Proceedings of the 16th Rapid.Tech Conference. https://doi.org/10.3139/9783446462441.025 bibtex: '@inproceedings{Klippstein_Schmid_2019, title={Methodik zur Qualifizierung des Lasersinter Prozesses für die Serienfertigung}, DOI={10.3139/9783446462441.025}, booktitle={Proceedings of the 16th Rapid.Tech Conference}, author={Klippstein, Sven Helge and Schmid, Hans-Joachim}, year={2019} }' chicago: Klippstein, Sven Helge, and Hans-Joachim Schmid. “Methodik Zur Qualifizierung Des Lasersinter Prozesses Für Die Serienfertigung.” In Proceedings of the 16th Rapid.Tech Conference, 2019. https://doi.org/10.3139/9783446462441.025. ieee: 'S. H. Klippstein and H.-J. Schmid, “Methodik zur Qualifizierung des Lasersinter Prozesses für die Serienfertigung,” 2019, doi: 10.3139/9783446462441.025.' mla: Klippstein, Sven Helge, and Hans-Joachim Schmid. “Methodik Zur Qualifizierung Des Lasersinter Prozesses Für Die Serienfertigung.” Proceedings of the 16th Rapid.Tech Conference, 2019, doi:10.3139/9783446462441.025. short: 'S.H. Klippstein, H.-J. Schmid, in: Proceedings of the 16th Rapid.Tech Conference, 2019.' date_created: 2021-05-14T07:46:31Z date_updated: 2022-01-06T06:55:28Z department: - _id: '150' - _id: '624' - _id: '219' doi: 10.3139/9783446462441.025 language: - iso: eng publication: Proceedings of the 16th Rapid.Tech Conference quality_controlled: '1' status: public title: Methodik zur Qualifizierung des Lasersinter Prozesses für die Serienfertigung type: conference user_id: '71545' year: '2019' ... --- _id: '24515' author: - first_name: Ricardo full_name: Tischendorf, Ricardo id: '67002' last_name: Tischendorf - first_name: M. full_name: Bieber, M. last_name: Bieber - first_name: R. full_name: Kneer, R. last_name: Kneer - first_name: Hans-Joachim full_name: Schmid, Hans-Joachim id: '464' last_name: Schmid citation: ama: 'Tischendorf R, Bieber M, Kneer R, Schmid H-J. Representative Sample Extraction from Spray Flames for SMPS and HR-TEM Measurements. In: PARTEC 2019 International Congress on Particle Technology; 2019.' apa: Tischendorf, R., Bieber, M., Kneer, R., & Schmid, H.-J. (2019). Representative Sample Extraction from Spray Flames for SMPS and HR-TEM Measurements. PARTEC 2019 International Congress on Particle Technology, Nürnberg. bibtex: '@inproceedings{Tischendorf_Bieber_Kneer_Schmid_2019, title={Representative Sample Extraction from Spray Flames for SMPS and HR-TEM Measurements}, publisher={PARTEC 2019 International Congress on Particle Technology}, author={Tischendorf, Ricardo and Bieber, M. and Kneer, R. and Schmid, Hans-Joachim}, year={2019} }' chicago: Tischendorf, Ricardo, M. Bieber, R. Kneer, and Hans-Joachim Schmid. “Representative Sample Extraction from Spray Flames for SMPS and HR-TEM Measurements.” PARTEC 2019 International Congress on Particle Technology, 2019. ieee: R. Tischendorf, M. Bieber, R. Kneer, and H.-J. Schmid, “Representative Sample Extraction from Spray Flames for SMPS and HR-TEM Measurements,” presented at the PARTEC 2019 International Congress on Particle Technology, Nürnberg, 2019. mla: Tischendorf, Ricardo, et al. Representative Sample Extraction from Spray Flames for SMPS and HR-TEM Measurements. PARTEC 2019 International Congress on Particle Technology, 2019. short: 'R. Tischendorf, M. Bieber, R. Kneer, H.-J. Schmid, in: PARTEC 2019 International Congress on Particle Technology, 2019.' conference: end_date: 2019-04-11 location: Nürnberg name: PARTEC 2019 International Congress on Particle Technology start_date: 2019-09-04 date_created: 2021-09-15T10:46:51Z date_updated: 2022-03-16T21:35:09Z ddc: - '620' file: - access_level: closed content_type: application/pdf creator: ricardo date_created: 2021-09-28T08:35:36Z date_updated: 2021-09-28T08:35:36Z file_id: '25054' file_name: 46.3_Tischendorf.pdf file_size: 319929 relation: main_file success: 1 file_date_updated: 2021-09-28T08:35:36Z has_accepted_license: '1' keyword: - FSP - nanoparticle synthesis - in situ measurements language: - iso: eng publication_status: published publisher: PARTEC 2019 International Congress on Particle Technology status: public title: Representative Sample Extraction from Spray Flames for SMPS and HR-TEM Measurements type: conference_abstract user_id: '67002' year: '2019' ... --- _id: '22202' abstract: - lang: eng text: Structural parts for aviation have very high demands on the development and production process. Therefore, the entire process must be considered in order to produce high-quality AM metal parts. In this case study, a conventional part was selected to be optimized for AM. The process presented includes component selection, design improvement with a novel approach for topology optimization based on the AMendate algorithm as basis of MSC Apex Generative Design,component production on a SLM 250 HL and post-processing including heat treatment and surface smoothing. With the topology optimization a weight reduction of ~60 % could be realized, whereby the stress distribution is more homogeneous. Furthermore, the challenges of support optimization and post-processing have to be addressed, in order to produce competitive parts. author: - first_name: Sven Helge full_name: Klippstein, Sven Helge id: '71545' last_name: Klippstein - first_name: Anne full_name: Duchting, Anne last_name: Duchting - first_name: Thomas full_name: Reiher, Thomas last_name: Reiher - first_name: F. full_name: Hengsbach, F. last_name: Hengsbach - first_name: Dennis full_name: Menge, Dennis id: '29240' last_name: Menge - first_name: Hans-Joachim full_name: Schmid, Hans-Joachim id: '464' last_name: Schmid orcid: 000-0001-8590-1921 citation: ama: 'Klippstein SH, Duchting A, Reiher T, Hengsbach F, Menge D, Schmid H-J. Devolopment, Production and post-processing of a topology optimized aircraft bracket . In: 30th Annual International Solid Freeform Fabrication Symposium. Vol 30. ; 2019:1932-1945.' apa: Klippstein, S. H., Duchting, A., Reiher, T., Hengsbach, F., Menge, D., & Schmid, H.-J. (2019). Devolopment, Production and post-processing of a topology optimized aircraft bracket . 30th Annual International Solid Freeform Fabrication Symposium, 30, 1932–1945. bibtex: '@inproceedings{Klippstein_Duchting_Reiher_Hengsbach_Menge_Schmid_2019, title={Devolopment, Production and post-processing of a topology optimized aircraft bracket }, volume={30}, booktitle={30th Annual International Solid Freeform Fabrication Symposium}, author={Klippstein, Sven Helge and Duchting, Anne and Reiher, Thomas and Hengsbach, F. and Menge, Dennis and Schmid, Hans-Joachim}, year={2019}, pages={1932–1945} }' chicago: Klippstein, Sven Helge, Anne Duchting, Thomas Reiher, F. Hengsbach, Dennis Menge, and Hans-Joachim Schmid. “Devolopment, Production and Post-Processing of a Topology Optimized Aircraft Bracket .” In 30th Annual International Solid Freeform Fabrication Symposium, 30:1932–45, 2019. ieee: S. H. Klippstein, A. Duchting, T. Reiher, F. Hengsbach, D. Menge, and H.-J. Schmid, “Devolopment, Production and post-processing of a topology optimized aircraft bracket ,” in 30th Annual International Solid Freeform Fabrication Symposium, 2019, vol. 30, pp. 1932–1945. mla: Klippstein, Sven Helge, et al. “Devolopment, Production and Post-Processing of a Topology Optimized Aircraft Bracket .” 30th Annual International Solid Freeform Fabrication Symposium, vol. 30, 2019, pp. 1932–45. short: 'S.H. Klippstein, A. Duchting, T. Reiher, F. Hengsbach, D. Menge, H.-J. Schmid, in: 30th Annual International Solid Freeform Fabrication Symposium, 2019, pp. 1932–1945.' date_created: 2021-05-14T07:46:35Z date_updated: 2023-03-27T20:06:22Z department: - _id: '150' - _id: '624' - _id: '219' intvolume: ' 30' language: - iso: eng main_file_link: - url: https://repositories.lib.utexas.edu/bitstream/handle/2152/90529/2019-160-Klippstein.pdf?sequence=2 page: 1932-1945 publication: 30th Annual International Solid Freeform Fabrication Symposium quality_controlled: '1' status: public title: 'Devolopment, Production and post-processing of a topology optimized aircraft bracket ' type: conference user_id: '71545' volume: 30 year: '2019' ... --- _id: '22541' abstract: - lang: eng text: Monodisperse micron-sized silica particle monolayers deposited onto plasma-grown SiOx-ultra-thin films have been used as reference systems to investigate wetting, water adsorption and capillary bridge formation as a function of silica surface functionalization. 1H,1H, 2H,2H perfluorooctyltriethoxysil (FOTS) monolayers, have been deposited on the respective surfaces by means of chemical vapor deposition resulting in macroscopically low energy surfaces. X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared (FTIR) reflection absorption spectroscopy confirmed the monolayer formation. Water adsorption isotherms were studied by a combination of in-situ FTIR reflection spectroscopy and quartz crystal microbalance (QCM) while macroscopic wetting was analysed by contact angle measurements. The comparative data evaluation indicates that the macroscopic wetting behaviour was changed as expected, however, that water nanodroplets formed both at intrinsic defects of the FOTS monolayer and at the FOTS/SiOx interface. Capillary bridges of liquid water are dominantly formed in the confined particle contact areas and between surface asperities on the particles. The comparison of wetting, adsorption and capillary bridge formation shows that the hydrophobization of porous materials by organosilane monolayers leads to the formation of morphology dependent nanoscopic defects that act as sites for preferential capillary bridge formation. author: - first_name: Ignacio full_name: Giner, Ignacio last_name: Giner - first_name: Boray full_name: Torun, Boray last_name: Torun - first_name: Yan full_name: Han, Yan last_name: Han - first_name: Belma full_name: Duderija, Belma id: '54863' last_name: Duderija - first_name: Dennis full_name: Meinderink, Dennis last_name: Meinderink - first_name: Alejandro González full_name: Orive, Alejandro González last_name: Orive - first_name: Maria Teresa full_name: de los Arcos de Pedro, Maria Teresa id: '54556' last_name: de los Arcos de Pedro - first_name: Christian full_name: Weinberger, Christian last_name: Weinberger - first_name: Michael full_name: Tiemann, Michael id: '23547' last_name: Tiemann orcid: 0000-0003-1711-2722 - first_name: Hans-Joachim full_name: Schmid, Hans-Joachim id: '464' last_name: Schmid orcid: 000-0001-8590-1921 - first_name: Guido full_name: Grundmeier, Guido id: '194' last_name: Grundmeier citation: ama: Giner I, Torun B, Han Y, et al. Water adsorption and capillary bridge formation on silica micro-particle layers modified with perfluorinated organosilane monolayers. Applied Surface Science. Published online 2019:873-879. doi:10.1016/j.apsusc.2018.12.221 apa: Giner, I., Torun, B., Han, Y., Duderija, B., Meinderink, D., Orive, A. G., de los Arcos de Pedro, M. T., Weinberger, C., Tiemann, M., Schmid, H.-J., & Grundmeier, G. (2019). Water adsorption and capillary bridge formation on silica micro-particle layers modified with perfluorinated organosilane monolayers. Applied Surface Science, 873–879. https://doi.org/10.1016/j.apsusc.2018.12.221 bibtex: '@article{Giner_Torun_Han_Duderija_Meinderink_Orive_de los Arcos de Pedro_Weinberger_Tiemann_Schmid_et al._2019, title={Water adsorption and capillary bridge formation on silica micro-particle layers modified with perfluorinated organosilane monolayers}, DOI={10.1016/j.apsusc.2018.12.221}, journal={Applied Surface Science}, author={Giner, Ignacio and Torun, Boray and Han, Yan and Duderija, Belma and Meinderink, Dennis and Orive, Alejandro González and de los Arcos de Pedro, Maria Teresa and Weinberger, Christian and Tiemann, Michael and Schmid, Hans-Joachim and et al.}, year={2019}, pages={873–879} }' chicago: Giner, Ignacio, Boray Torun, Yan Han, Belma Duderija, Dennis Meinderink, Alejandro González Orive, Maria Teresa de los Arcos de Pedro, et al. “Water Adsorption and Capillary Bridge Formation on Silica Micro-Particle Layers Modified with Perfluorinated Organosilane Monolayers.” Applied Surface Science, 2019, 873–79. https://doi.org/10.1016/j.apsusc.2018.12.221. ieee: 'I. Giner et al., “Water adsorption and capillary bridge formation on silica micro-particle layers modified with perfluorinated organosilane monolayers,” Applied Surface Science, pp. 873–879, 2019, doi: 10.1016/j.apsusc.2018.12.221.' mla: Giner, Ignacio, et al. “Water Adsorption and Capillary Bridge Formation on Silica Micro-Particle Layers Modified with Perfluorinated Organosilane Monolayers.” Applied Surface Science, 2019, pp. 873–79, doi:10.1016/j.apsusc.2018.12.221. short: I. Giner, B. Torun, Y. Han, B. Duderija, D. Meinderink, A.G. Orive, M.T. de los Arcos de Pedro, C. Weinberger, M. Tiemann, H.-J. Schmid, G. Grundmeier, Applied Surface Science (2019) 873–879. date_created: 2021-07-07T08:40:38Z date_updated: 2023-07-12T07:58:00Z department: - _id: '302' doi: 10.1016/j.apsusc.2018.12.221 language: - iso: eng page: 873-879 publication: Applied Surface Science publication_identifier: issn: - 0169-4332 publication_status: published status: public title: Water adsorption and capillary bridge formation on silica micro-particle layers modified with perfluorinated organosilane monolayers type: journal_article user_id: '54863' year: '2019' ... --- _id: '26103' abstract: - lang: eng text: Pore-scale filtration simulations require high spatio-temporal resolutions and significant computational effort, hence, keeping the domain size to a minimum is desirable. Previous studies have considered domains based on Brinkman length, or are limited by computing power, and little information is available for conditions involving high fluid saturation – typical of steady state mist filtration. In this study, simulations are performed to characterize the effect of domain size on pressure drop, residual saturation, liquid film thickness and interfacial area concentration, using virtual nonwoven and foam filters with similar micro-structural properties. Further, experiments using micro-CT are performed to validate the present computational simulations. It is found that two phase flow through filters are more sensitive to local geometric variations or mesh resolution in the porous media than single phase flow. Statistical uncertainties in the steady state quantities of less than +-10% can be expected to cope with the increase in computing power required for practical mesh sizes. A computational domain size of about 50–100xd (where d is the strut or fibre diameter) was found to be required for CFD for the operating conditions considered. author: - first_name: S. full_name: Abishek, S. last_name: Abishek - first_name: A.J.C. full_name: King, A.J.C. last_name: King - first_name: J. full_name: Schuler, J. last_name: Schuler - first_name: G. full_name: Kasper, G. last_name: Kasper - first_name: Hans-Joachim full_name: Schmid, Hans-Joachim id: '464' last_name: Schmid - first_name: B.J. full_name: Mullins, B.J. last_name: Mullins citation: ama: Abishek S, King AJC, Schuler J, Kasper G, Schmid H-J, Mullins BJ. Representative domain size for the simulation of coalescence filtration in nonwoven and foam media. Separation and Purification Technology. Published online 2018:344-352. doi:10.1016/j.seppur.2018.06.051 apa: Abishek, S., King, A. J. C., Schuler, J., Kasper, G., Schmid, H.-J., & Mullins, B. J. (2018). Representative domain size for the simulation of coalescence filtration in nonwoven and foam media. Separation and Purification Technology, 344–352. https://doi.org/10.1016/j.seppur.2018.06.051 bibtex: '@article{Abishek_King_Schuler_Kasper_Schmid_Mullins_2018, title={Representative domain size for the simulation of coalescence filtration in nonwoven and foam media}, DOI={10.1016/j.seppur.2018.06.051}, journal={Separation and Purification Technology}, author={Abishek, S. and King, A.J.C. and Schuler, J. and Kasper, G. and Schmid, Hans-Joachim and Mullins, B.J.}, year={2018}, pages={344–352} }' chicago: Abishek, S., A.J.C. King, J. Schuler, G. Kasper, Hans-Joachim Schmid, and B.J. Mullins. “Representative Domain Size for the Simulation of Coalescence Filtration in Nonwoven and Foam Media.” Separation and Purification Technology, 2018, 344–52. https://doi.org/10.1016/j.seppur.2018.06.051. ieee: 'S. Abishek, A. J. C. King, J. Schuler, G. Kasper, H.-J. Schmid, and B. J. Mullins, “Representative domain size for the simulation of coalescence filtration in nonwoven and foam media,” Separation and Purification Technology, pp. 344–352, 2018, doi: 10.1016/j.seppur.2018.06.051.' mla: Abishek, S., et al. “Representative Domain Size for the Simulation of Coalescence Filtration in Nonwoven and Foam Media.” Separation and Purification Technology, 2018, pp. 344–52, doi:10.1016/j.seppur.2018.06.051. short: S. Abishek, A.J.C. King, J. Schuler, G. Kasper, H.-J. Schmid, B.J. Mullins, Separation and Purification Technology (2018) 344–352. date_created: 2021-10-13T12:50:12Z date_updated: 2022-01-06T06:57:16Z doi: 10.1016/j.seppur.2018.06.051 language: - iso: eng page: 344-352 publication: Separation and Purification Technology publication_identifier: issn: - 1383-5866 publication_status: published status: public title: Representative domain size for the simulation of coalescence filtration in nonwoven and foam media type: journal_article user_id: '70093' year: '2018' ... --- _id: '22183' abstract: - lang: eng text: Function integration is a key issue for an efficient and economic usage of Additive Manufacturing. An efficient heat transfer by topology optimized structures is a rarely considered approach which will be outlined with an exemplary electronic housing which has been newly designed. A commercial projector unit, whose electrical components in total produce 38 W, shall be integrated in the closed housing and passively cooled by natural convection. Topology optimized structures shall be generated in the inner part of the housing to transfer the heat homogenously from the projector components to the housing wall while simultaneously minimizing the mass. At the outside of the housing walls, lattice and rib structures are applied to increase the effective surface for heat transfer by natural convection and radiation. Furthermore, the housing geometry is optimized regarding a minimization of support structures to reduce the post-processing effort. Finally, the housing shall be built of AlSi10Mg by SLM. author: - first_name: Dennis full_name: Menge, Dennis id: '29240' last_name: Menge - first_name: Patrick full_name: Delfs, Patrick last_name: Delfs - first_name: Marcel full_name: Töws, Marcel last_name: Töws - first_name: Hans-Joachim full_name: Schmid, Hans-Joachim id: '464' last_name: Schmid citation: ama: 'Menge D, Delfs P, Töws M, Schmid H-J. Topology Optimized Heat Transfer Using the Example of an Electronic Housing. In: 29th Annual International Solid Freeform Fabrication Symposium. Vol 29. ; 2018:687-697.' apa: Menge, D., Delfs, P., Töws, M., & Schmid, H.-J. (2018). Topology Optimized Heat Transfer Using the Example of an Electronic Housing. 29th Annual International Solid Freeform Fabrication Symposium, 29, 687–697. bibtex: '@inproceedings{Menge_Delfs_Töws_Schmid_2018, title={Topology Optimized Heat Transfer Using the Example of an Electronic Housing}, volume={29}, booktitle={29th Annual International Solid Freeform Fabrication Symposium}, author={Menge, Dennis and Delfs, Patrick and Töws, Marcel and Schmid, Hans-Joachim}, year={2018}, pages={687–697} }' chicago: Menge, Dennis, Patrick Delfs, Marcel Töws, and Hans-Joachim Schmid. “Topology Optimized Heat Transfer Using the Example of an Electronic Housing.” In 29th Annual International Solid Freeform Fabrication Symposium, 29:687–97, 2018. ieee: D. Menge, P. Delfs, M. Töws, and H.-J. Schmid, “Topology Optimized Heat Transfer Using the Example of an Electronic Housing,” in 29th Annual International Solid Freeform Fabrication Symposium, 2018, vol. 29, pp. 687–697. mla: Menge, Dennis, et al. “Topology Optimized Heat Transfer Using the Example of an Electronic Housing.” 29th Annual International Solid Freeform Fabrication Symposium, vol. 29, 2018, pp. 687–97. short: 'D. Menge, P. Delfs, M. Töws, H.-J. Schmid, in: 29th Annual International Solid Freeform Fabrication Symposium, 2018, pp. 687–697.' date_created: 2021-05-14T07:46:13Z date_updated: 2022-01-06T06:55:28Z department: - _id: '150' - _id: '624' - _id: '219' intvolume: ' 29' language: - iso: eng main_file_link: - open_access: '1' url: http://utw10945.utweb.utexas.edu/sites/default/files/2018/056%20TopologyOptimizedHeatTransferUsingtheExample.pdf oa: '1' page: 687-697 publication: 29th Annual International Solid Freeform Fabrication Symposium status: public title: Topology Optimized Heat Transfer Using the Example of an Electronic Housing type: conference user_id: '29240' volume: 29 year: '2018' ... --- _id: '22196' abstract: - lang: eng text: The influence of selective laser sintering (SLS) parameters on PA12 part properties is well known, but research on other materials is rare. One alternative material is a thermoplastic elastomer (TPE) called PrimePart ST that is more elastic and shows a distinct SLS processing behavior. It undergoes a three-dimensional temperature distribution during the SLS process within the TPE part cake. To examine this further, a temperature measurement system that allows temperature measurements inside the part cake is applied to TPE in the present work. Position-dependent temperature histories are directly correlated with the color and mechanical properties of built parts and are in very good agreement with artificial heat treatment in a furnace. Furthermore, it is clearly shown that the yellowish discoloration of parts in different intensities is not only temperature dependent but also influenced by the residual oxygen content in the process atmosphere. Nevertheless, the discoloration has no influence on the mechanical part properties. author: - first_name: Christina full_name: Kummert, Christina last_name: Kummert - first_name: Stefan full_name: Josupeit, Stefan last_name: Josupeit - first_name: Hans-Joachim full_name: Schmid, Hans-Joachim id: '464' last_name: Schmid citation: ama: Kummert C, Josupeit S, Schmid H-J. Thermoplastic Elastomer Part Color as Function of Temperature Histories and Oxygen Atmosphere During Selective Laser Sinterung. Journal of Minerals, Metals and Materials Society. 2018;70(3):425-430. doi:10.1007/s11837-017-2658-2 apa: Kummert, C., Josupeit, S., & Schmid, H.-J. (2018). Thermoplastic Elastomer Part Color as Function of Temperature Histories and Oxygen Atmosphere During Selective Laser Sinterung. Journal of Minerals, Metals and Materials Society, 70(3), 425–430. https://doi.org/10.1007/s11837-017-2658-2 bibtex: '@article{Kummert_Josupeit_Schmid_2018, title={Thermoplastic Elastomer Part Color as Function of Temperature Histories and Oxygen Atmosphere During Selective Laser Sinterung}, volume={70}, DOI={10.1007/s11837-017-2658-2}, number={3}, journal={Journal of Minerals, Metals and Materials Society}, publisher={Springer}, author={Kummert, Christina and Josupeit, Stefan and Schmid, Hans-Joachim}, year={2018}, pages={425–430} }' chicago: 'Kummert, Christina, Stefan Josupeit, and Hans-Joachim Schmid. “Thermoplastic Elastomer Part Color as Function of Temperature Histories and Oxygen Atmosphere During Selective Laser Sinterung.” Journal of Minerals, Metals and Materials Society 70, no. 3 (2018): 425–30. https://doi.org/10.1007/s11837-017-2658-2.' ieee: C. Kummert, S. Josupeit, and H.-J. Schmid, “Thermoplastic Elastomer Part Color as Function of Temperature Histories and Oxygen Atmosphere During Selective Laser Sinterung,” Journal of Minerals, Metals and Materials Society, vol. 70, no. 3, pp. 425–430, 2018. mla: Kummert, Christina, et al. “Thermoplastic Elastomer Part Color as Function of Temperature Histories and Oxygen Atmosphere During Selective Laser Sinterung.” Journal of Minerals, Metals and Materials Society, vol. 70, no. 3, Springer, 2018, pp. 425–30, doi:10.1007/s11837-017-2658-2. short: C. Kummert, S. Josupeit, H.-J. Schmid, Journal of Minerals, Metals and Materials Society 70 (2018) 425–430. date_created: 2021-05-14T07:46:28Z date_updated: 2022-01-06T06:55:28Z department: - _id: '150' - _id: '624' - _id: '219' doi: 10.1007/s11837-017-2658-2 intvolume: ' 70' issue: '3' language: - iso: eng page: 425-430 publication: Journal of Minerals, Metals and Materials Society publisher: Springer status: public title: Thermoplastic Elastomer Part Color as Function of Temperature Histories and Oxygen Atmosphere During Selective Laser Sinterung type: journal_article user_id: '71545' volume: 70 year: '2018' ... --- _id: '29824' abstract: - lang: eng text: " Zusammenfassung: Bei einem Verfahren und einer Vor-\r\nrichtung zur Bestimmung von Nanopartikeleigenschaften ei-\r\nnes nanopartikelbeladenen Aerosols (17), mit einer Test-\r\nkammer (1) zur Bestimmung der Nanopartikeleigenschaften\r\ndes Aerosols (17), wobei die Testkammer (1) einen Aero-\r\nsoleinlass (9) zum Einleiten des Aerosols (17) und ein Hül-\r\nlenluftstromeinlass (10) zur Einleitung eines Hüllenluftstroms\r\n(16) aufweist, die Oberseite (2) und die Unterseite (3) der\r\nTestkammer (1) jeweils eine flächige Elektrode (4, 5) auf-\r\nweist, so dass zwei im Abstand zueinander angeordnete\r\nElektroden (4, 5) bereitstehen, zwischen denen ein elektri-\r\nsches Feld (6) erzeugbar ist, soll ein kompaktes Messgerät\r\nfür die Vermessung der Eigenschaften von Aerosolnanopar-\r\ntikeln zur Verfügung gestellt werden, bei dem es ermöglicht\r\nwird, im selben Gerät die zweidimensionale Verteilung be-\r\nzüglich des aerodynamischen und des volumenäquivalen-\r\nten Durchmessers zu bestimmen, wodurch eine Lösung ge-\r\nschaffen wird, die es ermöglicht Aussagen über die Größe,\r\ndie Masse, die Form und die geometrische Struktur einer\r\nPartikel zu treffen. Dies wird dadurch erreicht, dass der Inhalt\r\nder Testkammer (1) in Rotation versetzt wird, wobei die Ro-\r\ntationsachse (18) parallel zum elektrischen Feld (6) verläuft." application_date: 30.01.2017 author: - first_name: Hans-Joachim full_name: Schmid, Hans-Joachim id: '464' last_name: Schmid - first_name: David full_name: Rasche, David last_name: Rasche citation: ama: Schmid H-J, Rasche D. Bestimmung von Nanopartikeleigenschaften eines Aerosols. Published online 2018. apa: Schmid, H.-J., & Rasche, D. (2018). Bestimmung von Nanopartikeleigenschaften eines Aerosols. bibtex: '@article{Schmid_Rasche_2018, title={Bestimmung von Nanopartikeleigenschaften eines Aerosols}, author={Schmid, Hans-Joachim and Rasche, David}, year={2018} }' chicago: Schmid, Hans-Joachim, and David Rasche. “Bestimmung von Nanopartikeleigenschaften Eines Aerosols,” 2018. ieee: H.-J. Schmid and D. Rasche, “Bestimmung von Nanopartikeleigenschaften eines Aerosols.” 2018. mla: Schmid, Hans-Joachim, and David Rasche. Bestimmung von Nanopartikeleigenschaften Eines Aerosols. 2018. short: H.-J. Schmid, D. Rasche, (2018). date_created: 2022-02-14T11:16:04Z date_updated: 2022-02-14T11:24:01Z department: - _id: '150' ipc: G01N 15/10 ipn: 10 2017 101 766.6 publication_date: 23.08.2018 related_material: link: - relation: confirmation url: https://register.dpma.de/DPMAregister/pat/register?AKZ=1020171017666 status: public title: Bestimmung von Nanopartikeleigenschaften eines Aerosols type: patent user_id: '3959' year: '2018' ... --- _id: '26104' abstract: - lang: eng text: Selective Laser Sintering (SLS) is an Additive Manufacturing technology, which allows the production of functional polymer parts. Conventionally mainly Nylon 12 (PA 12), Polyamide 11 (PA 11), glass- or aluminum filled materials enable rapid prototyping during the product development process. Those materials do not always meet the requirements for direct production of functional parts by laser sintering. For Direct Manufacturing of functional parts out of required materials and in high quality, the laser sintering process and the material palette needs to be further developed. During this research a laser sintering test equipment for material qualification has been built up. The forthcomings are an optimized software solution, an innovative optical system, an alternative powder coating system and an improved temperature control. The functionality of the test equipment is proved with the standard material PA2200 and two new laser-sintering-materials, Nylon 6 (PA 6) and Polyamide 613 (PA 613), are investigated. The process parameters are derived and mechanical properties are determined by tensile tests. author: - first_name: Johannes full_name: Lohn, Johannes last_name: Lohn - first_name: Hans-Joachim full_name: Schmid, Hans-Joachim id: '464' last_name: Schmid citation: ama: 'Lohn J, Schmid H-J. Aufbau einer Lasersinter-Versuchsanlage und Verarbeitung neuer Materialien am Beispiel von Polyamid 6 und Polyamid 613. In: Rapid.Tech – International Trade Show & Conference for Additive Manufacturing. ; 2017. doi:10.3139/9783446454606.023' apa: Lohn, J., & Schmid, H.-J. (2017). Aufbau einer Lasersinter-Versuchsanlage und Verarbeitung neuer Materialien am Beispiel von Polyamid 6 und Polyamid 613. In Rapid.Tech – International Trade Show & Conference for Additive Manufacturing. https://doi.org/10.3139/9783446454606.023 bibtex: '@inbook{Lohn_Schmid_2017, place={München}, title={Aufbau einer Lasersinter-Versuchsanlage und Verarbeitung neuer Materialien am Beispiel von Polyamid 6 und Polyamid 613}, DOI={10.3139/9783446454606.023}, booktitle={Rapid.Tech – International Trade Show & Conference for Additive Manufacturing}, author={Lohn, Johannes and Schmid, Hans-Joachim}, year={2017} }' chicago: Lohn, Johannes, and Hans-Joachim Schmid. “Aufbau Einer Lasersinter-Versuchsanlage Und Verarbeitung Neuer Materialien Am Beispiel von Polyamid 6 Und Polyamid 613.” In Rapid.Tech – International Trade Show & Conference for Additive Manufacturing. München, 2017. https://doi.org/10.3139/9783446454606.023. ieee: J. Lohn and H.-J. Schmid, “Aufbau einer Lasersinter-Versuchsanlage und Verarbeitung neuer Materialien am Beispiel von Polyamid 6 und Polyamid 613,” in Rapid.Tech – International Trade Show & Conference for Additive Manufacturing, München, 2017. mla: Lohn, Johannes, and Hans-Joachim Schmid. “Aufbau Einer Lasersinter-Versuchsanlage Und Verarbeitung Neuer Materialien Am Beispiel von Polyamid 6 Und Polyamid 613.” Rapid.Tech – International Trade Show & Conference for Additive Manufacturing, 2017, doi:10.3139/9783446454606.023. short: 'J. Lohn, H.-J. Schmid, in: Rapid.Tech – International Trade Show & Conference for Additive Manufacturing, München, 2017.' date_created: 2021-10-13T13:23:57Z date_updated: 2022-01-06T06:57:16Z doi: 10.3139/9783446454606.023 language: - iso: eng place: München publication: Rapid.Tech – International Trade Show & Conference for Additive Manufacturing publication_status: published status: public title: Aufbau einer Lasersinter-Versuchsanlage und Verarbeitung neuer Materialien am Beispiel von Polyamid 6 und Polyamid 613 type: book_chapter user_id: '70093' year: '2017' ... --- _id: '26106' abstract: - lang: eng text: We study the variation of the adhesion forces between wet TiO2 nanoparticles as a function of their size and the ambient relative humidity. Combining all-atom molecular dynamics and capillary simulations we demonstrate that the linear scaling of the interparticle forces with the particle diameter, well established for microscopic and macroscopic particles, can be extended down to diameters of a few nm. At this size scale, however, the molecular nature of the water adsorbates dictates the adhesion forces both via solvation effects and influencing parameters of analytical capillary models such as the equilibrium particle–particle separation distance and the water/particle contact angle. Moreover, the water surface tension becomes considerably larger than the macroscopic bulk value due to combined effects of thin-film confinement and tight curvature, in a way that strongly depends on humidity and particle size. Taking these effects into proper account, classical capillary equations can be used to predict the interparticle forces even of the smallest particles considered here (4 nm), although the circular approximation fails to reproduce the distance at which the water meniscus breaks. Finally, the transition between the dominating effects at the nanoscopic scale and conventional capillary theory valid at microscopic size scales can be only rationalized if the presence of roughness asperities on the surface of the large particles is explicitly taken into account. author: - first_name: Jens full_name: Laube, Jens last_name: Laube - first_name: Michael full_name: Dörmann, Michael last_name: Dörmann - first_name: Hans-Joachim full_name: Schmid, Hans-Joachim id: '464' last_name: Schmid - first_name: Lutz full_name: Mädler, Lutz last_name: Mädler - first_name: Lucio full_name: Colombi Ciacchi, Lucio last_name: Colombi Ciacchi citation: ama: Laube J, Dörmann M, Schmid H-J, Mädler L, Colombi Ciacchi L. Dependencies of the Adhesion Forces between TiO2 Nanoparticles on Size and Ambient Humidity. The Journal of Physical Chemistry C. Published online 2017:15294-15303. doi:10.1021/acs.jpcc.7b05655 apa: Laube, J., Dörmann, M., Schmid, H.-J., Mädler, L., & Colombi Ciacchi, L. (2017). Dependencies of the Adhesion Forces between TiO2 Nanoparticles on Size and Ambient Humidity. The Journal of Physical Chemistry C, 15294–15303. https://doi.org/10.1021/acs.jpcc.7b05655 bibtex: '@article{Laube_Dörmann_Schmid_Mädler_Colombi Ciacchi_2017, title={Dependencies of the Adhesion Forces between TiO2 Nanoparticles on Size and Ambient Humidity}, DOI={10.1021/acs.jpcc.7b05655}, journal={The Journal of Physical Chemistry C}, author={Laube, Jens and Dörmann, Michael and Schmid, Hans-Joachim and Mädler, Lutz and Colombi Ciacchi, Lucio}, year={2017}, pages={15294–15303} }' chicago: Laube, Jens, Michael Dörmann, Hans-Joachim Schmid, Lutz Mädler, and Lucio Colombi Ciacchi. “Dependencies of the Adhesion Forces between TiO2 Nanoparticles on Size and Ambient Humidity.” The Journal of Physical Chemistry C, 2017, 15294–303. https://doi.org/10.1021/acs.jpcc.7b05655. ieee: 'J. Laube, M. Dörmann, H.-J. Schmid, L. Mädler, and L. Colombi Ciacchi, “Dependencies of the Adhesion Forces between TiO2 Nanoparticles on Size and Ambient Humidity,” The Journal of Physical Chemistry C, pp. 15294–15303, 2017, doi: 10.1021/acs.jpcc.7b05655.' mla: Laube, Jens, et al. “Dependencies of the Adhesion Forces between TiO2 Nanoparticles on Size and Ambient Humidity.” The Journal of Physical Chemistry C, 2017, pp. 15294–303, doi:10.1021/acs.jpcc.7b05655. short: J. Laube, M. Dörmann, H.-J. Schmid, L. Mädler, L. Colombi Ciacchi, The Journal of Physical Chemistry C (2017) 15294–15303. date_created: 2021-10-13T13:31:20Z date_updated: 2022-01-06T06:57:16Z doi: 10.1021/acs.jpcc.7b05655 language: - iso: eng page: 15294-15303 publication: The Journal of Physical Chemistry C publication_identifier: issn: - 1932-7447 - 1932-7455 publication_status: published status: public title: Dependencies of the Adhesion Forces between TiO2 Nanoparticles on Size and Ambient Humidity type: journal_article user_id: '70093' year: '2017' ... --- _id: '26107' abstract: - lang: eng text: "Capillary forces are very important considering the handling of powders as they, in general, exceed other adhesion forces. These capillary forces are dependent on several different parameters. Especially the distance between the particles is an important parameter. For example, in moving bulk solids a large variety of distances between particles will occur. Therefore, the distance-dependence of capillary bridges was investigated with a numerical simulation method, assuming thermodynamic equilibrium which is attained very fast for small particles. This method uses the Kelvin equation and the Young-Laplace equation to calculate numerically the shape of the capillary bridge without any assumption regarding the shape. The force is eventually derived from the meniscus shape.\r\n\r\nThe distance becomes extremely important when the capillary liquid bridge between two surfaces is only determined by capillary condensation depending on relative humidity. Only a slight increase of the distance within the fraction of a nanometer changes the behaviour of the capillary force significantly. Furthermore, the influence of the force on the separation of particles will be presented. The force decreases almost linearly with increasing distance for a wide range of distances and consequently, a contact stiffness for capillary bridges could be derived. These results may e.g. be used in DEM models. Also, the maximum separation distance of capillary bridges in thermodynamic equilibrium and the correlation with the according bridge volume was investigated. As two limiting cases for capillary bridges at varying distances one can assume either a constant curvature, i.e. infinitely fast attainment of equilibrium, or a constant volume, i.e. infinitely slow attainment of equilibrium. Therefore, a comparison of these two possibilities will be presented and discussed as well." author: - first_name: Michael full_name: Dörmann, Michael last_name: Dörmann - first_name: Hans-Joachim full_name: Schmid, Hans-Joachim id: '464' last_name: Schmid citation: ama: Dörmann M, Schmid H-J. Distance-dependency of capillary bridges in thermodynamic equilibrium. Powder Technology. Published online 2017:175-183. doi:10.1016/j.powtec.2017.01.012 apa: Dörmann, M., & Schmid, H.-J. (2017). Distance-dependency of capillary bridges in thermodynamic equilibrium. Powder Technology, 175–183. https://doi.org/10.1016/j.powtec.2017.01.012 bibtex: '@article{Dörmann_Schmid_2017, title={Distance-dependency of capillary bridges in thermodynamic equilibrium}, DOI={10.1016/j.powtec.2017.01.012}, journal={Powder Technology}, author={Dörmann, Michael and Schmid, Hans-Joachim}, year={2017}, pages={175–183} }' chicago: Dörmann, Michael, and Hans-Joachim Schmid. “Distance-Dependency of Capillary Bridges in Thermodynamic Equilibrium.” Powder Technology, 2017, 175–83. https://doi.org/10.1016/j.powtec.2017.01.012. ieee: 'M. Dörmann and H.-J. Schmid, “Distance-dependency of capillary bridges in thermodynamic equilibrium,” Powder Technology, pp. 175–183, 2017, doi: 10.1016/j.powtec.2017.01.012.' mla: Dörmann, Michael, and Hans-Joachim Schmid. “Distance-Dependency of Capillary Bridges in Thermodynamic Equilibrium.” Powder Technology, 2017, pp. 175–83, doi:10.1016/j.powtec.2017.01.012. short: M. Dörmann, H.-J. Schmid, Powder Technology (2017) 175–183. date_created: 2021-10-13T13:33:31Z date_updated: 2022-01-06T06:57:16Z doi: 10.1016/j.powtec.2017.01.012 language: - iso: eng page: 175-183 publication: Powder Technology publication_identifier: issn: - 0032-5910 publication_status: published status: public title: Distance-dependency of capillary bridges in thermodynamic equilibrium type: journal_article user_id: '70093' year: '2017' ... --- _id: '23759' author: - first_name: Dennis full_name: Menge, Dennis id: '29240' last_name: Menge - first_name: Stefan full_name: Josupeit, Stefan last_name: Josupeit - first_name: 'Patrick ' full_name: 'Delfs, Patrick ' last_name: Delfs - first_name: Hans-Joachim full_name: Schmid, Hans-Joachim id: '464' last_name: Schmid citation: ama: 'Menge D, Josupeit S, Delfs P, Schmid H-J. Herstellbarkeit und mechanische Charakterisierung von lasergesinterten Gitterstrukturen. In: Richard HA, Schramm B, Zipsner T, eds. Additive Fertigung von Bauteilen und Strukturen. Wiesbaden: Springer Vieweg; 2017:105-120. doi:10.1007/978-3-658-17780-5' apa: 'Menge, D., Josupeit, S., Delfs, P., & Schmid, H.-J. (2017). Herstellbarkeit und mechanische Charakterisierung von lasergesinterten Gitterstrukturen. In H. A. Richard, B. Schramm, & T. Zipsner (Eds.), Additive Fertigung von Bauteilen und Strukturen (pp. 105–120). Wiesbaden: Springer Vieweg. https://doi.org/10.1007/978-3-658-17780-5' bibtex: '@inbook{Menge_Josupeit_Delfs_Schmid_2017, place={Wiesbaden}, title={Herstellbarkeit und mechanische Charakterisierung von lasergesinterten Gitterstrukturen}, DOI={10.1007/978-3-658-17780-5}, booktitle={Additive Fertigung von Bauteilen und Strukturen}, publisher={Springer Vieweg}, author={Menge, Dennis and Josupeit, Stefan and Delfs, Patrick and Schmid, Hans-Joachim}, editor={Richard, Hans Albert and Schramm, Britta and Zipsner, ThomasEditors}, year={2017}, pages={105–120} }' chicago: 'Menge, Dennis, Stefan Josupeit, Patrick Delfs, and Hans-Joachim Schmid. “Herstellbarkeit und mechanische Charakterisierung von lasergesinterten Gitterstrukturen.” In Additive Fertigung von Bauteilen und Strukturen, edited by Hans Albert Richard, Britta Schramm, and Thomas Zipsner, 105–20. Wiesbaden: Springer Vieweg, 2017. https://doi.org/10.1007/978-3-658-17780-5.' ieee: 'D. Menge, S. Josupeit, P. Delfs, and H.-J. Schmid, “Herstellbarkeit und mechanische Charakterisierung von lasergesinterten Gitterstrukturen,” in Additive Fertigung von Bauteilen und Strukturen, H. A. Richard, B. Schramm, and T. Zipsner, Eds. Wiesbaden: Springer Vieweg, 2017, pp. 105–120.' mla: Menge, Dennis, et al. “Herstellbarkeit und mechanische Charakterisierung von lasergesinterten Gitterstrukturen.” Additive Fertigung von Bauteilen und Strukturen, edited by Hans Albert Richard et al., Springer Vieweg, 2017, pp. 105–20, doi:10.1007/978-3-658-17780-5. short: 'D. Menge, S. Josupeit, P. Delfs, H.-J. Schmid, in: H.A. Richard, B. Schramm, T. Zipsner (Eds.), Additive Fertigung von Bauteilen und Strukturen, Springer Vieweg, Wiesbaden, 2017, pp. 105–120.' date_created: 2021-09-03T13:06:00Z date_updated: 2022-01-06T06:55:59Z department: - _id: '150' - _id: '219' - _id: '624' doi: 10.1007/978-3-658-17780-5 editor: - first_name: Hans Albert full_name: Richard, Hans Albert last_name: Richard - first_name: Britta full_name: Schramm, Britta last_name: Schramm - first_name: Thomas full_name: Zipsner, Thomas last_name: Zipsner language: - iso: ger page: 105-120 place: Wiesbaden publication: Additive Fertigung von Bauteilen und Strukturen publication_identifier: isbn: - '9783658177799' - '9783658177805' publication_status: published publisher: Springer Vieweg status: public title: Herstellbarkeit und mechanische Charakterisierung von lasergesinterten Gitterstrukturen type: book_chapter user_id: '29240' year: '2017' ... --- _id: '22195' abstract: - lang: eng text: 'Polymer laser sintering (LS) is an important additive manufacturing (AM) technology. Individual and complex parts are directly produced from CAD data without the need of specific tools. The raw material is a polymer powder, which is deposited layerwise and melted selectively with a laser. Built parts are embedded in residual unmolten powder, the so-called part cake, which undergoes thermal ageing effects due to the exposure to high temperatures for long times during the manufacturing process. Hence, the recyclability of the unmolten powder is limited. This article focuses on a fundamental analysis of the ageing kinetics dependent on time, temperature, and oxygen content in the gas atmosphere. A model is developed and applied to measured, position-dependent process temperature histories to successfully predict the ageing distribution within a part cake. The results can be used to optimize the thermal process management in LS and to develop new efficient powder recycling methods. ' author: - first_name: Stefan full_name: Josupeit, Stefan last_name: Josupeit - first_name: Hans-Joachim full_name: Schmid, Hans-Joachim id: '464' last_name: Schmid citation: ama: Josupeit S, Schmid H-J. Experimental analysis and modeling of local ageing effects during laser sintering of polyamide 12 in regard to individual thermal histories. Journal of Applied Polymer Science. 2017;134(42). doi:10.1002/app.45435 apa: Josupeit, S., & Schmid, H.-J. (2017). Experimental analysis and modeling of local ageing effects during laser sintering of polyamide 12 in regard to individual thermal histories. Journal of Applied Polymer Science, 134(42). https://doi.org/10.1002/app.45435 bibtex: '@article{Josupeit_Schmid_2017, title={Experimental analysis and modeling of local ageing effects during laser sintering of polyamide 12 in regard to individual thermal histories}, volume={134}, DOI={10.1002/app.45435}, number={42}, journal={Journal of Applied Polymer Science}, publisher={Wiley}, author={Josupeit, Stefan and Schmid, Hans-Joachim}, year={2017} }' chicago: Josupeit, Stefan, and Hans-Joachim Schmid. “Experimental Analysis and Modeling of Local Ageing Effects during Laser Sintering of Polyamide 12 in Regard to Individual Thermal Histories.” Journal of Applied Polymer Science 134, no. 42 (2017). https://doi.org/10.1002/app.45435. ieee: S. Josupeit and H.-J. Schmid, “Experimental analysis and modeling of local ageing effects during laser sintering of polyamide 12 in regard to individual thermal histories,” Journal of Applied Polymer Science, vol. 134, no. 42, 2017. mla: Josupeit, Stefan, and Hans-Joachim Schmid. “Experimental Analysis and Modeling of Local Ageing Effects during Laser Sintering of Polyamide 12 in Regard to Individual Thermal Histories.” Journal of Applied Polymer Science, vol. 134, no. 42, Wiley, 2017, doi:10.1002/app.45435. short: S. Josupeit, H.-J. Schmid, Journal of Applied Polymer Science 134 (2017). date_created: 2021-05-14T07:46:27Z date_updated: 2022-01-06T06:55:28Z department: - _id: '150' - _id: '624' - _id: '219' doi: 10.1002/app.45435 intvolume: ' 134' issue: '42' language: - iso: eng publication: Journal of Applied Polymer Science publisher: Wiley status: public title: Experimental analysis and modeling of local ageing effects during laser sintering of polyamide 12 in regard to individual thermal histories type: journal_article user_id: '71545' volume: 134 year: '2017' ... --- _id: '26109' abstract: - lang: eng text: Temperature effects in the polymer laser sintering process are an important aspect regarding the process reproducibility and part quality. Depending on the job layout and position within the part cake, individual temperature histories occur during the process. Temperature history dependent effects are for example part warpage, the crystallization rate and powder ageing effects. This work focuses on temperatures and heat flow within laser sintered part cakes. Therefore, a thermal Finite Element (FE) model of a part cake is developed based on experimental in-process temperature measurements. Thermal boundary conditions and properties of the used bulk polymer powder are analyzed and relevant parameters are identified. The model is validated and optimized considering different job heights and ambient conditions during the cooling phase. It is finally possible to predict position-dependent temperature histories as a function of significant job parameters. The model allows a transfer of the results for varied boundary conditions during cooling. In combination with an implementation of built parts, this model will be an important tool for the development of optimized process controls and cooling strategies. author: - first_name: Stefan full_name: Josupeit, Stefan last_name: Josupeit - first_name: Lavish full_name: Ordia, Lavish last_name: Ordia - first_name: Hans-Joachim full_name: Schmid, Hans-Joachim id: '464' last_name: Schmid citation: ama: Josupeit S, Ordia L, Schmid H-J. Modelling of temperatures and heat flow within laser sintered part cakes. Additive Manufacturing. Published online 2016:189-196. doi:10.1016/j.addma.2016.06.002 apa: Josupeit, S., Ordia, L., & Schmid, H.-J. (2016). Modelling of temperatures and heat flow within laser sintered part cakes. Additive Manufacturing, 189–196. https://doi.org/10.1016/j.addma.2016.06.002 bibtex: '@article{Josupeit_Ordia_Schmid_2016, title={Modelling of temperatures and heat flow within laser sintered part cakes}, DOI={10.1016/j.addma.2016.06.002}, journal={Additive Manufacturing}, author={Josupeit, Stefan and Ordia, Lavish and Schmid, Hans-Joachim}, year={2016}, pages={189–196} }' chicago: Josupeit, Stefan, Lavish Ordia, and Hans-Joachim Schmid. “Modelling of Temperatures and Heat Flow within Laser Sintered Part Cakes.” Additive Manufacturing, 2016, 189–96. https://doi.org/10.1016/j.addma.2016.06.002. ieee: 'S. Josupeit, L. Ordia, and H.-J. Schmid, “Modelling of temperatures and heat flow within laser sintered part cakes,” Additive Manufacturing, pp. 189–196, 2016, doi: 10.1016/j.addma.2016.06.002.' mla: Josupeit, Stefan, et al. “Modelling of Temperatures and Heat Flow within Laser Sintered Part Cakes.” Additive Manufacturing, 2016, pp. 189–96, doi:10.1016/j.addma.2016.06.002. short: S. Josupeit, L. Ordia, H.-J. Schmid, Additive Manufacturing (2016) 189–196. date_created: 2021-10-13T13:40:29Z date_updated: 2022-01-06T06:57:16Z doi: 10.1016/j.addma.2016.06.002 language: - iso: eng page: 189-196 publication: Additive Manufacturing publication_identifier: issn: - 2214-8604 publication_status: published status: public title: Modelling of temperatures and heat flow within laser sintered part cakes type: journal_article user_id: '70093' year: '2016' ... --- _id: '26111' abstract: - lang: eng text: The shape and fracture of the free surface frequently limits the measuring range and impedes the use of optical velocimetric techniques in parallel plate and cone plate setups. To prevent this, various kinds of edge guards are often employed. In the present study, we elucidate how an edge guard distorts the steady velocity profile in a parallel plate setup. To this end, we analyzed the velocity field of a strongly shear-thinning fluid, a Newtonian fluid and a set of suspensions via particle image velocimetry in a parallel plate device. Several guard ring sizes were studied. The distortion is described by a simple three parameter model. These parameters are mostly constant for different fluids and suspensions with particle volume fractions below 45%. With increasing radius, the guard ring.s influence approaches a limiting value that we attribute to the influence of the fluid surrounding the gap. Our results indicate a limiting ratio of the difference between plate radius and guard to gap size that should always be exceeded. In the presence of a guard ring, even Newtonian fluids do not exhibit a constant shear rate for most radial distances within the gap. This distortion of the velocity field challenges the simple superposition approach of unguarded device and guard influence that is prevalent in the literature. author: - first_name: Hans-Joachim full_name: Schmid, Hans-Joachim id: '464' last_name: Schmid - first_name: S. full_name: Pieper, S. last_name: Pieper citation: ama: Schmid H-J, Pieper S. Guard ring induced distortion of the steady velocity profile in a parallel plate rheometer. Applied Rheology. Published online 2016. doi:10.3933/APPLRHEOL-26-64533 apa: Schmid, H.-J., & Pieper, S. (2016). Guard ring induced distortion of the steady velocity profile in a parallel plate rheometer. Applied Rheology. https://doi.org/10.3933/APPLRHEOL-26-64533 bibtex: '@article{Schmid_Pieper_2016, title={Guard ring induced distortion of the steady velocity profile in a parallel plate rheometer}, DOI={10.3933/APPLRHEOL-26-64533}, journal={Applied Rheology}, author={Schmid, Hans-Joachim and Pieper, S.}, year={2016} }' chicago: Schmid, Hans-Joachim, and S. Pieper. “Guard Ring Induced Distortion of the Steady Velocity Profile in a Parallel Plate Rheometer.” Applied Rheology, 2016. https://doi.org/10.3933/APPLRHEOL-26-64533. ieee: 'H.-J. Schmid and S. Pieper, “Guard ring induced distortion of the steady velocity profile in a parallel plate rheometer,” Applied Rheology, 2016, doi: 10.3933/APPLRHEOL-26-64533.' mla: Schmid, Hans-Joachim, and S. Pieper. “Guard Ring Induced Distortion of the Steady Velocity Profile in a Parallel Plate Rheometer.” Applied Rheology, 2016, doi:10.3933/APPLRHEOL-26-64533. short: H.-J. Schmid, S. Pieper, Applied Rheology (2016). date_created: 2021-10-13T13:43:24Z date_updated: 2022-01-06T06:57:16Z doi: 10.3933/APPLRHEOL-26-64533 language: - iso: eng publication: Applied Rheology publication_identifier: unknown: - 1617-8106 (Applied Rheology - Online Edition) status: public title: Guard ring induced distortion of the steady velocity profile in a parallel plate rheometer type: journal_article user_id: '70093' year: '2016' ...