@inproceedings{27551,
  author       = {{Ludwig, Janis and Kykal, Carsten and Schmid, Hans-Joachim}},
  booktitle    = {{Book of abstracts for the 2021 European Aerosol Conference}},
  keywords     = {{aerosol spreading, SARS-CoV-2, indoor air filtration}},
  title        = {{{Assessing spreading and removal of virus laden aerosols in different settings using an aerosol method (oral presentation)}}},
  year         = {{2021}},
}

@techreport{24943,
  author       = {{Menge, Dennis and Klippstein, Sven Helge and Schmid, Hans-Joachim}},
  pages        = {{130}},
  title        = {{{Additive Leichtbaustrukturen für die Flugzeugkabine}}},
  year         = {{2020}},
}

@article{24182,
  abstract     = {{<jats:title>Abstract</jats:title><jats:p>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.</jats:p>}},
  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 Gehlen, Christoph and Hauschildt, Inga and Ivanova, Irina and Jesinghausen, Steffen and Klein, Christopher and Krauss, Hans-W. and Lohaus, Ludger and Lowke, Dirk and Mazanec, Oliver and Pawelczyk, Sebastian and Pott, Ursula and Radebe, Nonkululeko W. and Riedmiller, Joachim Jürgen and Schmid, Hans-Joachim and Schmidt, Wolfram and Secrieru, Egor and Stephan, Dietmar and Thiedeitz, Mareike and Wilhelm, Manfred and Mechtcherine, Viktor}},
  issn         = {{1359-5997}},
  journal      = {{Materials and Structures}},
  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}},
  year         = {{2020}},
}

@inproceedings{22182,
  author       = {{Kummert, Christina and Diekmann, Wolfgang and Tews, Katrin and Schmid, Hans-Joachim}},
  booktitle    = {{29th Annual International Solid Freeform Fabrication Symposium}},
  pages        = {{735--744}},
  title        = {{{Influence of Part Microstructure on Mechanicl Properties of PA6X Laser Sintered Specimens}}},
  doi          = {{http://utw10945.utweb.utexas.edu/sites/default/files/2019/063%20Influence%20of%20Part%20Microstructure%20on%20Mechanical%20Pro.pdf}},
  volume       = {{29}},
  year         = {{2020}},
}

@misc{51660,
  author       = {{Tissen, Anton and Ponusamy, SathishKumar}},
  title        = {{{Untersuchung eines neuen thermischen Partikelverrundungsprozesses}}},
  year         = {{2020}},
}

@misc{54382,
  author       = {{Walker, Patrick Simon}},
  title        = {{{Bewertung der Fließeigenschaften von Lasersinterpulver (Sinterpulver)}}},
  year         = {{2020}},
}

@article{21949,
  abstract     = {{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.}},
  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 Gehlen, Christoph and Hauschildt, Inga and Ivanova, Irina and Jesinghausen, Steffen and Klein, Christopher and Krauss, Hans-W. and Lohaus, Ludger and Lowke, Dirk and Mazanec, Oliver and Pawelczyk, Sebastian and Pott, Ursula and Radebe, Nonkululeko W. and Riedmiller, Joachim Jürgen and Schmid, Hans-Joachim and Schmidt, Wolfram and Secrieru, Egor and Stephan, Dietmar and Thiedeitz, Mareike and Wilhelm, Manfred and Mechtcherine, Viktor}},
  issn         = {{1359-5997}},
  journal      = {{Materials and Structures}},
  keywords     = {{Rheology, Wall Slip, Slip, apparent slip, suspension, cement, concrete}},
  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}},
  year         = {{2020}},
}

@article{21948,
  abstract     = {{<jats:p>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.</jats:p>}},
  author       = {{Pawelczyk, Sebastian and Kniepkamp, Marieluise and Jesinghausen, Steffen and Schmid, Hans-Joachim}},
  issn         = {{1996-1944}},
  journal      = {{Materials}},
  keywords     = {{wall slip prevention, effective gap height, parallel-plate system, structured surfaces, model suspensions, cement paste, fresh concrete}},
  title        = {{{Absolute Rheological Measurements of Model Suspensions: Influence and Correction of Wall Slip Prevention Measures}}},
  doi          = {{10.3390/ma13020467}},
  year         = {{2020}},
}

@article{21514,
  abstract     = {{The influence of latent heat storage elements on the cooling performance and the temperature rise time of household refrigerating appliances is studied experimentally in the context of the “new global refriger- ator standard”IEC 62552:2015. In addition to the daily energy consumption, this international standard- ization introduced performance tests for cooling capacity and temperature rise time. While the cooling capacity has long been anchored in various test procedures of consumer organizations, the temperature rise time, which has only been tested on freezers so far, will be a decisive factor in the future. Moreover, the need for so-called "smart appliances" that may balance power consumption is increasing since such devices may compensate the volatility of renewable energies and thus stabilize the power grid. Against this background, eight commercial household refrigerators and refrigerator-freezers are equipped with polymer-bound phase change materials (PCM) and their performance is determined under the new stan- dard test conditions. The results show that the introduction of PCM increases the cooling capacity by up to 33 % and also increases the temperature rise time by up to 145 %, without affecting power consump- tion, as compared to the unmodified refrigeration appliances.}},
  author       = {{Sonnenrein, Gerrit and Baumhögger, Elmar and Elsner, Andreas and Morbach, A. and Neukötter, Moritz and Paul, Andreas and Vrabec, J.}},
  issn         = {{0140-7007}},
  journal      = {{International Journal of Refrigeration}},
  pages        = {{448--456}},
  publisher    = {{Elsevier}},
  title        = {{{Improving the performance of household refrigerating appliances through the integration of phase change materials in the context of the new global refrigerator standard IEC 62552:2015}}},
  doi          = {{10.1016/j.ijrefrig.2020.07.025}},
  volume       = {{119}},
  year         = {{2020}},
}

@phdthesis{24753,
  abstract     = {{Polymer Laser Sintering (LS) is one of the most used Additive Manufacturing (AM) technologies for the tool-less production of polymer parts. The raw material is a polymer powder which is melted layerwise by the use of laser energy. Especially for the production of single parts, small series, individualized and complex structures, the technology is yet established in few branches. However, inhomogeneous and hardly controllable thermal effects during manufacturing limit the build reproducibility. The present work focuses on temperatures within so-called part cakes, their time dependency and their influence on process quality. Therefore, a temperature measurement system is implemented into a commercial laser sintering machine. Based on the experimental data a model to simulate heat transfer within part cakes is set up. Individual thermal histories during processing are successfully correlated with position dependent powder ageing effects. Another focus is on the analysis of a recycling optimized material. First results of correlations between thermal histories and part properties are shown in order to provide an outlook to further research. The data and knowledge gained through this work can be used to understand thermal effects in greater depth and to increase the process quality via optimizations.}},
  author       = {{Josupeit, Stefan}},
  isbn         = {{978-3-8440-6720-0}},
  keywords     = {{Additive Manufacturing, Polymer Laser Sintering, Polymer Science}},
  pages        = {{178}},
  publisher    = {{Shaker Verlag GmbH}},
  title        = {{{On the Influence of Thermal Histories within Part Cakes on the Polymer Laser Sintering Process}}},
  volume       = {{11}},
  year         = {{2019}},
}

@phdthesis{24758,
  abstract     = {{Stand der Technik beim Lasersintern von Kunststoffen (SLS) ist die Fertigung von Prototypen aus z.B. Polyamid 12. Die industrielle Serienproduktion mittels SLS erfordert die Qualifizierung von produktspezifischen Materialien. Kernthema dieser Arbeit ist die Verarbeitung von neuen Kunststoffen.
Hierzu wird eine optimierte Anlagentechnik entwickelt. Die Verarbeitung von schlecht rieselfähigen Pulvern wird durch ein innovatives Beschichtungssystem ermöglicht. Durch eine zwölf Zonen Heizungsregelung erfolgt die Pulvervorwärmung in der erforderlichen Präzision. Zudem ermöglicht ein variabler Laserspot eine Belichtung mit hoher Detailauflösung bei gleichzeitig hoher Aufbaurate.
Der Energieeintrag im SLS Prozess und die Belichtung mit variablem Laserspotdurchmesser werden theoretisch betrachtet und mittels Computertomographie experimentell untersucht.
Abschließend wird eine Systematik zur Identifizierung von Prozessparameter für die Verarbeitung neuer Materialien erarbeitet und exemplarisch wird das neue Material Polyamid 613 prozessiert.}},
  author       = {{Lohn, Johannes}},
  isbn         = {{978-3-8440-7078-1}},
  keywords     = {{Additive Fertigung, Selektives Lasersintern, Kunststoff, Energieeintrag}},
  pages        = {{154}},
  publisher    = {{Shaker Verlag GmbH}},
  title        = {{{Zum Laserstrahlschmelzen neuer Kunststoffmaterialien}}},
  volume       = {{15}},
  year         = {{2019}},
}

@techreport{24628,
  author       = {{Menge, Dennis and Walter, Rolf and Schmid, Hans-Joachim and Breuer, Ulf Paul}},
  pages        = {{77}},
  title        = {{{FVA-Nr. 813 I - Generative Verfahren zur Herstellung von Polymerbauteilen}}},
  volume       = {{1338}},
  year         = {{2019}},
}

@inproceedings{22198,
  abstract     = {{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       = {{Klippstein, Sven Helge and Schmid, Hans-Joachim}},
  booktitle    = {{Proceedings of the 16th Rapid.Tech Conference}},
  title        = {{{Methodik zur Qualifizierung des Lasersinter Prozesses für die Serienfertigung}}},
  doi          = {{10.3139/9783446462441.025}},
  year         = {{2019}},
}

@misc{54381,
  author       = {{Sander, Janina Isabella}},
  title        = {{{Aufbau einer Wirbelschicht zur Untersuchung von SLS-Polymerpulver (Studienarbeit)}}},
  year         = {{2019}},
}

@phdthesis{42129,
  author       = {{Zhen, Xinz}},
  pages        = {{203}},
  title        = {{{Numerische und experimentelle Untersuchungen zur Aerosolbildung aus binären Dampfgemischen von Wasser und Glycerin}}},
  year         = {{2019}},
}

@inproceedings{22202,
  abstract     = {{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       = {{Klippstein, Sven Helge and Duchting, Anne and Reiher, Thomas and Hengsbach, F. and Menge, Dennis and Schmid, Hans-Joachim}},
  booktitle    = {{30th Annual International Solid Freeform Fabrication Symposium}},
  pages        = {{1932--1945}},
  title        = {{{Devolopment, Production and post-processing of a topology optimized aircraft bracket }}},
  volume       = {{30}},
  year         = {{2019}},
}

@inproceedings{22183,
  abstract     = {{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       = {{Menge, Dennis and Delfs, Patrick and Töws, Marcel and Schmid, Hans-Joachim}},
  booktitle    = {{29th Annual International Solid Freeform Fabrication Symposium}},
  pages        = {{687--697}},
  title        = {{{Topology Optimized Heat Transfer Using the Example of an Electronic Housing}}},
  volume       = {{29}},
  year         = {{2018}},
}

@article{22196,
  abstract     = {{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       = {{Kummert, Christina and Josupeit, Stefan and Schmid, Hans-Joachim}},
  journal      = {{Journal of Minerals, Metals and Materials Society}},
  number       = {{3}},
  pages        = {{425--430}},
  publisher    = {{Springer}},
  title        = {{{Thermoplastic Elastomer Part Color as Function of Temperature Histories and Oxygen Atmosphere During Selective Laser Sinterung}}},
  doi          = {{10.1007/s11837-017-2658-2}},
  volume       = {{70}},
  year         = {{2018}},
}

@misc{29824,
  abstract     = {{ Zusammenfassung: Bei einem Verfahren und einer Vor-
richtung zur Bestimmung von Nanopartikeleigenschaften ei-
nes nanopartikelbeladenen Aerosols (17), mit einer Test-
kammer (1) zur Bestimmung der Nanopartikeleigenschaften
des Aerosols (17), wobei die Testkammer (1) einen Aero-
soleinlass (9) zum Einleiten des Aerosols (17) und ein Hül-
lenluftstromeinlass (10) zur Einleitung eines Hüllenluftstroms
(16) aufweist, die Oberseite (2) und die Unterseite (3) der
Testkammer (1) jeweils eine flächige Elektrode (4, 5) auf-
weist, so dass zwei im Abstand zueinander angeordnete
Elektroden (4, 5) bereitstehen, zwischen denen ein elektri-
sches Feld (6) erzeugbar ist, soll ein kompaktes Messgerät
für die Vermessung der Eigenschaften von Aerosolnanopar-
tikeln zur Verfügung gestellt werden, bei dem es ermöglicht
wird, im selben Gerät die zweidimensionale Verteilung be-
züglich des aerodynamischen und des volumenäquivalen-
ten Durchmessers zu bestimmen, wodurch eine Lösung ge-
schaffen wird, die es ermöglicht Aussagen über die Größe,
die Masse, die Form und die geometrische Struktur einer
Partikel zu treffen. Dies wird dadurch erreicht, dass der Inhalt
der Testkammer (1) in Rotation versetzt wird, wobei die Ro-
tationsachse (18) parallel zum elektrischen Feld (6) verläuft.}},
  author       = {{Schmid, Hans-Joachim and Rasche, David}},
  title        = {{{Bestimmung von Nanopartikeleigenschaften eines Aerosols}}},
  year         = {{2018}},
}

@phdthesis{42128,
  author       = {{Pieper, Sven}},
  isbn         = {{978-3-8440-5879-6}},
  pages        = {{135}},
  publisher    = {{Shaker Verlag}},
  title        = {{{Confinement Induced Segregation Effects in Suspension Rheology}}},
  volume       = {{5}},
  year         = {{2018}},
}