[{"publisher":"Elsevier BV","date_created":"2022-10-17T13:42:12Z","status":"public","publication_identifier":{"issn":["0045-7825"]},"year":"2022","language":[{"iso":"eng"}],"_id":"33801","date_updated":"2023-04-27T10:05:16Z","author":[{"first_name":"Rolf","full_name":"Mahnken, Rolf","last_name":"Mahnken","id":"335"}],"intvolume":" 401","publication_status":"published","citation":{"chicago":"Mahnken, Rolf. “New Low Order Runge–Kutta Schemes for Asymptotically Exact Global Error Estimation of Embedded Methods without Order Reduction.” Computer Methods in Applied Mechanics and Engineering 401 (2022). https://doi.org/10.1016/j.cma.2022.115553.","ieee":"R. Mahnken, “New low order Runge–Kutta schemes for asymptotically exact global error estimation of embedded methods without order reduction,” Computer Methods in Applied Mechanics and Engineering, vol. 401, Art. no. 115553, 2022, doi: 10.1016/j.cma.2022.115553.","apa":"Mahnken, R. (2022). New low order Runge–Kutta schemes for asymptotically exact global error estimation of embedded methods without order reduction. Computer Methods in Applied Mechanics and Engineering, 401, Article 115553. https://doi.org/10.1016/j.cma.2022.115553","ama":"Mahnken R. New low order Runge–Kutta schemes for asymptotically exact global error estimation of embedded methods without order reduction. Computer Methods in Applied Mechanics and Engineering. 2022;401. doi:10.1016/j.cma.2022.115553","short":"R. Mahnken, Computer Methods in Applied Mechanics and Engineering 401 (2022).","mla":"Mahnken, Rolf. “New Low Order Runge–Kutta Schemes for Asymptotically Exact Global Error Estimation of Embedded Methods without Order Reduction.” Computer Methods in Applied Mechanics and Engineering, vol. 401, 115553, Elsevier BV, 2022, doi:10.1016/j.cma.2022.115553.","bibtex":"@article{Mahnken_2022, title={New low order Runge–Kutta schemes for asymptotically exact global error estimation of embedded methods without order reduction}, volume={401}, DOI={10.1016/j.cma.2022.115553}, number={115553}, journal={Computer Methods in Applied Mechanics and Engineering}, publisher={Elsevier BV}, author={Mahnken, Rolf}, year={2022} }"},"department":[{"_id":"9"},{"_id":"154"},{"_id":"321"}],"quality_controlled":"1","publication":"Computer Methods in Applied Mechanics and Engineering","type":"journal_article","volume":401,"article_number":"115553","title":"New low order Runge–Kutta schemes for asymptotically exact global error estimation of embedded methods without order reduction","doi":"10.1016/j.cma.2022.115553","user_id":"335","keyword":["Computer Science Applications","General Physics and Astronomy","Mechanical Engineering","Mechanics of Materials","Computational Mechanics"]},{"department":[{"_id":"156"}],"publication_status":"published","citation":{"ama":"Dahms F, Homberg W. Manufacture of Defined Residual Stress Distributions in the Friction-Spinning Process: Driven Tool and Subsequent Flow-Forming. Key Engineering Materials. 2022;926:683-689. doi:10.4028/p-3rk19y","apa":"Dahms, F., & Homberg, W. (2022). Manufacture of Defined Residual Stress Distributions in the Friction-Spinning Process: Driven Tool and Subsequent Flow-Forming. Key Engineering Materials, 926, 683–689. https://doi.org/10.4028/p-3rk19y","ieee":"F. Dahms and W. Homberg, “Manufacture of Defined Residual Stress Distributions in the Friction-Spinning Process: Driven Tool and Subsequent Flow-Forming,” Key Engineering Materials, vol. 926, pp. 683–689, 2022, doi: 10.4028/p-3rk19y.","chicago":"Dahms, Frederik, and Werner Homberg. “Manufacture of Defined Residual Stress Distributions in the Friction-Spinning Process: Driven Tool and Subsequent Flow-Forming.” Key Engineering Materials 926 (2022): 683–89. https://doi.org/10.4028/p-3rk19y.","bibtex":"@article{Dahms_Homberg_2022, title={Manufacture of Defined Residual Stress Distributions in the Friction-Spinning Process: Driven Tool and Subsequent Flow-Forming}, volume={926}, DOI={10.4028/p-3rk19y}, journal={Key Engineering Materials}, publisher={Trans Tech Publications, Ltd.}, author={Dahms, Frederik and Homberg, Werner}, year={2022}, pages={683–689} }","mla":"Dahms, Frederik, and Werner Homberg. “Manufacture of Defined Residual Stress Distributions in the Friction-Spinning Process: Driven Tool and Subsequent Flow-Forming.” Key Engineering Materials, vol. 926, Trans Tech Publications, Ltd., 2022, pp. 683–89, doi:10.4028/p-3rk19y.","short":"F. Dahms, W. Homberg, Key Engineering Materials 926 (2022) 683–689."},"intvolume":" 926","author":[{"last_name":"Dahms","id":"64977","full_name":"Dahms, Frederik","first_name":"Frederik"},{"last_name":"Homberg","id":"233","full_name":"Homberg, Werner","first_name":"Werner"}],"conference":{"end_date":"29 April 2022","name":"25th International Conference on Material Forming (ESAFORM 2022)","location":"Braga, Portugal","start_date":"27 April 2022"},"date_updated":"2023-04-27T10:30:38Z","_id":"32412","status":"public","year":"2022","publication_identifier":{"issn":["1662-9795"]},"language":[{"iso":"eng"}],"publisher":"Trans Tech Publications, Ltd.","date_created":"2022-07-25T08:32:43Z","user_id":"64977","keyword":["Mechanical Engineering","Mechanics of Materials","General Materials Science"],"doi":"10.4028/p-3rk19y","abstract":[{"lang":"eng","text":"Friction-spinning as an innovative incremental forming process enables large degrees of deformation in the field of tube and sheet metal forming due to a self-induced heat generation in the forming zone. This paper presents a new tool and process design with a driven tool for the targeted adjustment of residual stress distributions in the friction-spinning process. Locally adapted residual stress depth distributions are intended to improve the functionality of the friction-spinning workpieces, e.g. by delaying failure or triggering it in a defined way. The new process designs with the driven tool and a subsequent flow-forming operation are investigated regarding the influence on the residual stress depth distributions compared to those of standard friction-spinning process. Residual stress depth distributions are measured with the incremental hole-drilling method. The workpieces (tubular part with a flange) are manufactured using heat-treatable 3.3206 (EN-AW 6060 T6) tubular profiles. It is shown that the residual stress depth distributions change significantly due to the new process designs, which offers new potentials for the targeted adjustment of residual stresses that serve to improve the workpiece properties."}],"title":"Manufacture of Defined Residual Stress Distributions in the Friction-Spinning Process: Driven Tool and Subsequent Flow-Forming","volume":926,"page":"683-689","type":"journal_article","quality_controlled":"1","publication":"Key Engineering Materials"},{"citation":{"ama":"Schramm B, Weiß D. Fracture mechanical evaluation of the material HCT590X. Materials Testing. 2022;64(10):1437-1449. doi:10.1515/mt-2022-0191","apa":"Schramm, B., & Weiß, D. (2022). Fracture mechanical evaluation of the material HCT590X. Materials Testing, 64(10), 1437–1449. https://doi.org/10.1515/mt-2022-0191","chicago":"Schramm, Britta, and Deborah Weiß. “Fracture Mechanical Evaluation of the Material HCT590X.” Materials Testing 64, no. 10 (2022): 1437–49. https://doi.org/10.1515/mt-2022-0191.","ieee":"B. Schramm and D. Weiß, “Fracture mechanical evaluation of the material HCT590X,” Materials Testing, vol. 64, no. 10, pp. 1437–1449, 2022, doi: 10.1515/mt-2022-0191.","mla":"Schramm, Britta, and Deborah Weiß. “Fracture Mechanical Evaluation of the Material HCT590X.” Materials Testing, vol. 64, no. 10, Walter de Gruyter GmbH, 2022, pp. 1437–49, doi:10.1515/mt-2022-0191.","bibtex":"@article{Schramm_Weiß_2022, title={Fracture mechanical evaluation of the material HCT590X}, volume={64}, DOI={10.1515/mt-2022-0191}, number={10}, journal={Materials Testing}, publisher={Walter de Gruyter GmbH}, author={Schramm, Britta and Weiß, Deborah}, year={2022}, pages={1437–1449} }","short":"B. Schramm, D. Weiß, Materials Testing 64 (2022) 1437–1449."},"publication_status":"published","department":[{"_id":"143"},{"_id":"630"}],"author":[{"last_name":"Schramm","id":"4668","first_name":"Britta","full_name":"Schramm, Britta"},{"last_name":"Weiß","id":"45673","full_name":"Weiß, Deborah","first_name":"Deborah"}],"intvolume":" 64","_id":"34403","date_updated":"2023-04-27T10:20:38Z","date_created":"2022-12-13T15:19:58Z","publisher":"Walter de Gruyter GmbH","language":[{"iso":"eng"}],"publication_identifier":{"issn":["0025-5300","2195-8572"]},"year":"2022","status":"public","keyword":["Mechanical Engineering","Mechanics of Materials","General Materials Science"],"user_id":"45673","title":"Fracture mechanical evaluation of the material HCT590X","project":[{"grant_number":"418701707","_id":"130","name":"TRR 285: TRR 285"},{"_id":"132","name":"TRR 285 - B: TRR 285 - Project Area B"},{"_id":"143","name":"TRR 285 – B04: TRR 285 - Subproject B04"}],"doi":"10.1515/mt-2022-0191","abstract":[{"text":"For a reliable, strength-compliant and fracture-resistant design of components and technical structures and for the prevention of damage cases, both the criteria of strength calculation and fracture mechanics are essential. In contrast to strength calculation the fracture mechanics assumes the existence of cracks which might further propagate due to the operational load. First, the present paper illustrates the general procedure of a fracture mechanical evaluation of fatigue cracks in order to assess practical damage cases. Fracture mechanical fundamentals which are essential for the calculation of the stress intensity factors K\r\n I and the experimental determination of fracture mechanical material parameters (e.g. threshold ΔK\r\n I,th against fatigue crack growth, crack growth rate curve) are explained in detail. The subsequent fracture mechanical evaluation on the basis of the local stress situation at the crack tip and the fracture mechanical material data is executed for different materials and selected crack problems. Hereby, the main focus is on the material HCT590X as it is the essential material being investigated by TRR285.","lang":"eng"}],"page":"1437-1449","volume":64,"issue":"10","quality_controlled":"1","publication":"Materials Testing","type":"journal_article"},{"title":"Co-bonding of carbon fibre-reinforced epoxy and galvanised steel with laser structured interface for automotive applications","author":[{"last_name":"Voswinkel","id":"52634","full_name":"Voswinkel, Dietrich","first_name":"Dietrich"},{"full_name":"Striewe, Jan Andre","first_name":"Jan Andre","last_name":"Striewe","id":"29413"},{"last_name":"Grydin","id":"43822","first_name":"Olexandr","full_name":"Grydin, Olexandr"},{"id":"32378","last_name":"Meinderink","first_name":"Dennis","full_name":"Meinderink, Dennis","orcid":"0000-0002-2755-6514"},{"full_name":"Grundmeier, Guido","first_name":"Guido","id":"194","last_name":"Grundmeier"},{"full_name":"Schaper, Mirko","first_name":"Mirko","last_name":"Schaper","id":"43720"},{"full_name":"Tröster, Thomas","first_name":"Thomas","last_name":"Tröster","id":"553"}],"doi":"10.1080/09243046.2022.2143746","citation":{"apa":"Voswinkel, D., Striewe, J. A., Grydin, O., Meinderink, D., Grundmeier, G., Schaper, M., & Tröster, T. (2022). Co-bonding of carbon fibre-reinforced epoxy and galvanised steel with laser structured interface for automotive applications. Advanced Composite Materials, 1–16. https://doi.org/10.1080/09243046.2022.2143746","ama":"Voswinkel D, Striewe JA, Grydin O, et al. Co-bonding of carbon fibre-reinforced epoxy and galvanised steel with laser structured interface for automotive applications. Advanced Composite Materials. Published online 2022:1-16. doi:10.1080/09243046.2022.2143746","chicago":"Voswinkel, Dietrich, Jan Andre Striewe, Olexandr Grydin, Dennis Meinderink, Guido Grundmeier, Mirko Schaper, and Thomas Tröster. “Co-Bonding of Carbon Fibre-Reinforced Epoxy and Galvanised Steel with Laser Structured Interface for Automotive Applications.” Advanced Composite Materials, 2022, 1–16. https://doi.org/10.1080/09243046.2022.2143746.","ieee":"D. Voswinkel et al., “Co-bonding of carbon fibre-reinforced epoxy and galvanised steel with laser structured interface for automotive applications,” Advanced Composite Materials, pp. 1–16, 2022, doi: 10.1080/09243046.2022.2143746.","mla":"Voswinkel, Dietrich, et al. “Co-Bonding of Carbon Fibre-Reinforced Epoxy and Galvanised Steel with Laser Structured Interface for Automotive Applications.” Advanced Composite Materials, Informa UK Limited, 2022, pp. 1–16, doi:10.1080/09243046.2022.2143746.","bibtex":"@article{Voswinkel_Striewe_Grydin_Meinderink_Grundmeier_Schaper_Tröster_2022, title={Co-bonding of carbon fibre-reinforced epoxy and galvanised steel with laser structured interface for automotive applications}, DOI={10.1080/09243046.2022.2143746}, journal={Advanced Composite Materials}, publisher={Informa UK Limited}, author={Voswinkel, Dietrich and Striewe, Jan Andre and Grydin, Olexandr and Meinderink, Dennis and Grundmeier, Guido and Schaper, Mirko and Tröster, Thomas}, year={2022}, pages={1–16} }","short":"D. Voswinkel, J.A. Striewe, O. Grydin, D. Meinderink, G. Grundmeier, M. Schaper, T. Tröster, Advanced Composite Materials (2022) 1–16."},"user_id":"43720","publication_status":"published","keyword":["Mechanical Engineering","Mechanics of Materials","Ceramics and Composites"],"department":[{"_id":"9"},{"_id":"149"},{"_id":"321"},{"_id":"158"}],"publication":"Advanced Composite Materials","quality_controlled":"1","date_created":"2022-11-17T08:05:26Z","publisher":"Informa UK Limited","year":"2022","type":"journal_article","publication_identifier":{"issn":["0924-3046","1568-5519"]},"language":[{"iso":"eng"}],"status":"public","page":"1-16","_id":"34097","date_updated":"2023-04-27T16:36:14Z"},{"date_updated":"2023-04-27T16:39:55Z","_id":"36327","status":"public","publication_identifier":{"issn":["1073-5623","1543-1940"]},"year":"2022","language":[{"iso":"eng"}],"publisher":"Springer Science and Business Media LLC","date_created":"2023-01-12T09:30:12Z","department":[{"_id":"158"},{"_id":"321"}],"publication_status":"published","citation":{"chicago":"Reitz, Alexander, Olexandr Grydin, and Mirko Schaper. “Optical Detection of Phase Transformations in Steels: An Innovative Method for Time-Efficient Material Characterization During Tailored Thermo-Mechanical Processing of a Press Hardening Steel.” Metallurgical and Materials Transactions A 53, no. 8 (2022): 3125–42. https://doi.org/10.1007/s11661-022-06732-z.","ieee":"A. Reitz, O. Grydin, and M. Schaper, “Optical Detection of Phase Transformations in Steels: An Innovative Method for Time-Efficient Material Characterization During Tailored Thermo-mechanical Processing of a Press Hardening Steel,” Metallurgical and Materials Transactions A, vol. 53, no. 8, pp. 3125–3142, 2022, doi: 10.1007/s11661-022-06732-z.","apa":"Reitz, A., Grydin, O., & Schaper, M. (2022). Optical Detection of Phase Transformations in Steels: An Innovative Method for Time-Efficient Material Characterization During Tailored Thermo-mechanical Processing of a Press Hardening Steel. Metallurgical and Materials Transactions A, 53(8), 3125–3142. https://doi.org/10.1007/s11661-022-06732-z","ama":"Reitz A, Grydin O, Schaper M. Optical Detection of Phase Transformations in Steels: An Innovative Method for Time-Efficient Material Characterization During Tailored Thermo-mechanical Processing of a Press Hardening Steel. Metallurgical and Materials Transactions A. 2022;53(8):3125-3142. doi:10.1007/s11661-022-06732-z","short":"A. Reitz, O. Grydin, M. Schaper, Metallurgical and Materials Transactions A 53 (2022) 3125–3142.","mla":"Reitz, Alexander, et al. “Optical Detection of Phase Transformations in Steels: An Innovative Method for Time-Efficient Material Characterization During Tailored Thermo-Mechanical Processing of a Press Hardening Steel.” Metallurgical and Materials Transactions A, vol. 53, no. 8, Springer Science and Business Media LLC, 2022, pp. 3125–42, doi:10.1007/s11661-022-06732-z.","bibtex":"@article{Reitz_Grydin_Schaper_2022, title={Optical Detection of Phase Transformations in Steels: An Innovative Method for Time-Efficient Material Characterization During Tailored Thermo-mechanical Processing of a Press Hardening Steel}, volume={53}, DOI={10.1007/s11661-022-06732-z}, number={8}, journal={Metallurgical and Materials Transactions A}, publisher={Springer Science and Business Media LLC}, author={Reitz, Alexander and Grydin, Olexandr and Schaper, Mirko}, year={2022}, pages={3125–3142} }"},"intvolume":" 53","author":[{"orcid":"0000-0001-9047-467X","full_name":"Reitz, Alexander","first_name":"Alexander","last_name":"Reitz","id":"24803"},{"full_name":"Grydin, Olexandr","first_name":"Olexandr","id":"43822","last_name":"Grydin"},{"full_name":"Schaper, Mirko","first_name":"Mirko","id":"43720","last_name":"Schaper"}],"issue":"8","volume":53,"page":"3125-3142","type":"journal_article","publication":"Metallurgical and Materials Transactions A","quality_controlled":"1","user_id":"43720","oa":"1","main_file_link":[{"url":"https://link.springer.com/article/10.1007/s11661-022-06732-z","open_access":"1"}],"keyword":["Metals and Alloys","Mechanics of Materials","Condensed Matter Physics"],"abstract":[{"lang":"eng","text":"AbstractWith an innovative optical characterization method, using high-temperature digital image correlation in combination with thermal imaging, the local change in strain and change in temperature could be determined during thermo-mechanical treatment of flat steel specimens. With data obtained by this optical method, the transformation kinetics for every area of interest along the whole measuring length of a flat specimen could be analyzed by the generation of dilatation curves. The benefit of this innovative optical characterization method compared to a dilatometer test is that the experimental effort for the design of a tailored component could be strongly reduced to the investigation of only a few tailored thermo-mechanical processed specimens. Due to the implementation of a strain and/or temperature gradient within the flat specimen, less metallographic samples are prepared for hardness analysis and analysis of the microstructural composition by scanning electron microscopy to investigate the influence of different process parameters. Compared to performed dilatometer tests in this study, the optical method obtained comparable results for the transformation start and end temperatures. For the final design of a part with tailored properties, the optical method is suitable for a time-efficient material characterization.\r\n Graphical Abstract"}],"doi":"10.1007/s11661-022-06732-z","title":"Optical Detection of Phase Transformations in Steels: An Innovative Method for Time-Efficient Material Characterization During Tailored Thermo-mechanical Processing of a Press Hardening Steel"},{"department":[{"_id":"158"},{"_id":"321"}],"publication_status":"published","citation":{"bibtex":"@article{Šlapáková_Křivská_Fekete_Králík_Grydin_Stolbchenko_Schaper_2022, title={The influence of surface on direction of diffusion in Al-Fe clad material}, volume={190}, DOI={10.1016/j.matchar.2022.112005}, number={112005}, journal={Materials Characterization}, publisher={Elsevier BV}, author={Šlapáková, Michaela and Křivská, Barbora and Fekete, Klaudia and Králík, Rostislav and Grydin, Olexandr and Stolbchenko, Mykhailo and Schaper, Mirko}, year={2022} }","mla":"Šlapáková, Michaela, et al. “The Influence of Surface on Direction of Diffusion in Al-Fe Clad Material.” Materials Characterization, vol. 190, 112005, Elsevier BV, 2022, doi:10.1016/j.matchar.2022.112005.","short":"M. Šlapáková, B. Křivská, K. Fekete, R. Králík, O. Grydin, M. Stolbchenko, M. Schaper, Materials Characterization 190 (2022).","apa":"Šlapáková, M., Křivská, B., Fekete, K., Králík, R., Grydin, O., Stolbchenko, M., & Schaper, M. (2022). The influence of surface on direction of diffusion in Al-Fe clad material. Materials Characterization, 190, Article 112005. https://doi.org/10.1016/j.matchar.2022.112005","ama":"Šlapáková M, Křivská B, Fekete K, et al. The influence of surface on direction of diffusion in Al-Fe clad material. Materials Characterization. 2022;190. doi:10.1016/j.matchar.2022.112005","ieee":"M. Šlapáková et al., “The influence of surface on direction of diffusion in Al-Fe clad material,” Materials Characterization, vol. 190, Art. no. 112005, 2022, doi: 10.1016/j.matchar.2022.112005.","chicago":"Šlapáková, Michaela, Barbora Křivská, Klaudia Fekete, Rostislav Králík, Olexandr Grydin, Mykhailo Stolbchenko, and Mirko Schaper. “The Influence of Surface on Direction of Diffusion in Al-Fe Clad Material.” Materials Characterization 190 (2022). https://doi.org/10.1016/j.matchar.2022.112005."},"intvolume":" 190","author":[{"first_name":"Michaela","full_name":"Šlapáková, Michaela","last_name":"Šlapáková"},{"last_name":"Křivská","full_name":"Křivská, Barbora","first_name":"Barbora"},{"full_name":"Fekete, Klaudia","first_name":"Klaudia","last_name":"Fekete"},{"full_name":"Králík, Rostislav","first_name":"Rostislav","last_name":"Králík"},{"id":"43822","last_name":"Grydin","first_name":"Olexandr","full_name":"Grydin, Olexandr"},{"full_name":"Stolbchenko, Mykhailo","first_name":"Mykhailo","last_name":"Stolbchenko"},{"last_name":"Schaper","id":"43720","full_name":"Schaper, Mirko","first_name":"Mirko"}],"article_type":"original","date_updated":"2023-04-27T16:40:10Z","_id":"36328","status":"public","publication_identifier":{"issn":["1044-5803"]},"year":"2022","language":[{"iso":"eng"}],"publisher":"Elsevier BV","date_created":"2023-01-12T09:32:05Z","user_id":"43720","keyword":["Mechanical Engineering","Mechanics of Materials","Condensed Matter Physics","General Materials Science"],"main_file_link":[{"url":"https://www.sciencedirect.com/science/article/abs/pii/S104458032200287X"}],"abstract":[{"text":"Aluminium-steel clad composite was manufactured by twin-roll casting. An intermetallic layer of Al5Fe2 and Al13Fe4 formed at the interface upon annealing above 500 °C. During in-situ annealing in transmission electron microscope, the layer grew towards the steel side of the interface in tongue-like protrusions. A study of furnace-annealed samples revealed, that the bulk growth of the interface phase proceeds towards the aluminium side. The growth towards steel is a surface effect that takes place simultaneously with the bulk growth towards aluminium. At the beginning of the intermetallic layer formation diffusion of Fe into aluminium prevails, afterwards Al atoms diffuse throught the newly formed intermetallic layer towards steel and the whole interface shifts towards aluminium. The kinetics of growth of the intermetallic layer follows parabolic law in both cases, indicating that the growth is governed by diffusion.","lang":"eng"}],"doi":"10.1016/j.matchar.2022.112005","title":"The influence of surface on direction of diffusion in Al-Fe clad material","article_number":"112005","volume":190,"type":"journal_article","quality_controlled":"1","publication":"Materials Characterization"},{"article_number":"142780","volume":838,"type":"journal_article","publication":"Materials Science and Engineering: A","quality_controlled":"1","keyword":["Mechanical Engineering","Mechanics of Materials","Condensed Matter Physics","General Materials Science"],"main_file_link":[{"url":"https://www.sciencedirect.com/science/article/abs/pii/S0921509322001885"}],"user_id":"43720","abstract":[{"text":"In order to reduce CO2 emissions in the transport sector, the approach of load-adapted components is increasingly being pursued. For the design of such components, it is crucial to determine their resulting microstructure and mechanical properties. For this purpose, continuous cooling transformation diagrams and deformation continuous cooling transformation diagrams are utilized, however, their curves are strongly influenced by the chemical composition, the initial state and especially the process parameters.\r\n\r\nIn this study, the influence of the process parameters on the transformation kinetics is systematically investigated using an innovative characterization method. The experimental setup allowed a near-process analysis of the transformation kinetics, resulting microstructure and mechanical properties for a specific process route with a reduced number of specimens. A systematic investigation of the effects of different process parameters on the microstructural and mechanical properties made it possible to reveal interactions and independencies between the process parameters in order to design a partial heating or differential cooling process. Furthermore, the implementation of two different cooling conditions, representative of differential cooling in the die relief method with tool-contact and non-contact areas, showed that the soaking duration has a significant influence on the microstructure in the non-contact tool area.","lang":"eng"}],"doi":"10.1016/j.msea.2022.142780","title":"Influence of thermomechanical processing on the microstructural and mechanical properties of steel 22MnB5","date_updated":"2023-04-27T16:42:08Z","_id":"29811","language":[{"iso":"eng"}],"year":"2022","publication_identifier":{"issn":["0921-5093"]},"status":"public","date_created":"2022-02-11T17:19:11Z","funded_apc":"1","publisher":"Elsevier BV","department":[{"_id":"158"},{"_id":"321"}],"citation":{"ama":"Reitz A, Grydin O, Schaper M. Influence of thermomechanical processing on the microstructural and mechanical properties of steel 22MnB5. Materials Science and Engineering: A. 2022;838. doi:10.1016/j.msea.2022.142780","apa":"Reitz, A., Grydin, O., & Schaper, M. (2022). Influence of thermomechanical processing on the microstructural and mechanical properties of steel 22MnB5. Materials Science and Engineering: A, 838, Article 142780. https://doi.org/10.1016/j.msea.2022.142780","chicago":"Reitz, Alexander, Olexandr Grydin, and Mirko Schaper. “Influence of Thermomechanical Processing on the Microstructural and Mechanical Properties of Steel 22MnB5.” Materials Science and Engineering: A 838 (2022). https://doi.org/10.1016/j.msea.2022.142780.","ieee":"A. Reitz, O. Grydin, and M. Schaper, “Influence of thermomechanical processing on the microstructural and mechanical properties of steel 22MnB5,” Materials Science and Engineering: A, vol. 838, Art. no. 142780, 2022, doi: 10.1016/j.msea.2022.142780.","mla":"Reitz, Alexander, et al. “Influence of Thermomechanical Processing on the Microstructural and Mechanical Properties of Steel 22MnB5.” Materials Science and Engineering: A, vol. 838, 142780, Elsevier BV, 2022, doi:10.1016/j.msea.2022.142780.","bibtex":"@article{Reitz_Grydin_Schaper_2022, title={Influence of thermomechanical processing on the microstructural and mechanical properties of steel 22MnB5}, volume={838}, DOI={10.1016/j.msea.2022.142780}, number={142780}, journal={Materials Science and Engineering: A}, publisher={Elsevier BV}, author={Reitz, Alexander and Grydin, Olexandr and Schaper, Mirko}, year={2022} }","short":"A. Reitz, O. Grydin, M. 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Journal of Advanced Joining Processes. 2022;6. doi:10.1016/j.jajp.2022.100133"},"department":[{"_id":"143"},{"_id":"157"}],"author":[{"last_name":"Schramm","id":"4668","first_name":"Britta","full_name":"Schramm, Britta"},{"first_name":"Sven","full_name":"Martin, Sven","id":"38177","last_name":"Martin"},{"full_name":"Steinfelder, Christian","first_name":"Christian","last_name":"Steinfelder"},{"first_name":"Christian Roman","full_name":"Bielak, Christian Roman","last_name":"Bielak","id":"34782"},{"full_name":"Brosius, Alexander","first_name":"Alexander","last_name":"Brosius"},{"first_name":"Gerson","full_name":"Meschut, Gerson","last_name":"Meschut","id":"32056","orcid":"0000-0002-2763-1246"},{"id":"553","last_name":"Tröster","full_name":"Tröster, Thomas","first_name":"Thomas"},{"last_name":"Wallmersperger","full_name":"Wallmersperger, Thomas","first_name":"Thomas"},{"last_name":"Mergheim","full_name":"Mergheim, Julia","first_name":"Julia"}],"title":"A Review on the Modeling of the Clinching Process Chain - Part I: Design Phase","doi":"10.1016/j.jajp.2022.100133","intvolume":" 6","project":[{"name":"TRR 285: TRR 285","_id":"130","grant_number":"418701707"},{"_id":"143","name":"TRR 285 – B04: TRR 285 - Subproject B04"},{"_id":"140","name":"TRR 285 – B01: TRR 285 - Subproject B01"},{"name":"TRR 285 – A01: TRR 285 - Subproject A01","_id":"135"},{"name":"TRR 285 – B03: TRR 285 - Subproject B03","_id":"142"},{"name":"TRR 285 – A05: TRR 285 - Subproject A05","_id":"139"}],"volume":6,"_id":"34069","date_updated":"2023-04-28T11:30:38Z","article_number":"100133","publisher":"Elsevier BV","publication":"Journal of Advanced Joining Processes","quality_controlled":"1","date_created":"2022-11-14T08:53:49Z","status":"public","year":"2022","type":"journal_article","publication_identifier":{"issn":["2666-3309"]},"language":[{"iso":"eng"}]},{"keyword":["Mechanical Engineering","Mechanics of Materials","Engineering (miscellaneous)","Chemical Engineering (miscellaneous)"],"publication_status":"published","user_id":"34782","citation":{"ieee":"B. Schramm et al., “A Review on the Modeling of the Clinching Process Chain - Part II: Joining Process,” Journal of Advanced Joining Processes, Art. no. 100134, 2022, doi: 10.1016/j.jajp.2022.100134.","chicago":"Schramm, Britta, Johannes Friedlein, Benjamin Gröger, Christian Roman Bielak, Mathias Bobbert, Maik Gude, Gerson Meschut, Thomas Wallmersperger, and Julia Mergheim. “A Review on the Modeling of the Clinching Process Chain - Part II: Joining Process.” Journal of Advanced Joining Processes, 2022. https://doi.org/10.1016/j.jajp.2022.100134.","apa":"Schramm, B., Friedlein, J., Gröger, B., Bielak, C. R., Bobbert, M., Gude, M., Meschut, G., Wallmersperger, T., & Mergheim, J. (2022). A Review on the Modeling of the Clinching Process Chain - Part II: Joining Process. Journal of Advanced Joining Processes, Article 100134. https://doi.org/10.1016/j.jajp.2022.100134","ama":"Schramm B, Friedlein J, Gröger B, et al. A Review on the Modeling of the Clinching Process Chain - Part II: Joining Process. Journal of Advanced Joining Processes. Published online 2022. doi:10.1016/j.jajp.2022.100134","short":"B. Schramm, J. Friedlein, B. Gröger, C.R. Bielak, M. Bobbert, M. Gude, G. Meschut, T. Wallmersperger, J. Mergheim, Journal of Advanced Joining Processes (2022).","bibtex":"@article{Schramm_Friedlein_Gröger_Bielak_Bobbert_Gude_Meschut_Wallmersperger_Mergheim_2022, title={A Review on the Modeling of the Clinching Process Chain - Part II: Joining Process}, DOI={10.1016/j.jajp.2022.100134}, number={100134}, journal={Journal of Advanced Joining Processes}, publisher={Elsevier BV}, author={Schramm, Britta and Friedlein, Johannes and Gröger, Benjamin and Bielak, Christian Roman and Bobbert, Mathias and Gude, Maik and Meschut, Gerson and Wallmersperger, Thomas and Mergheim, Julia}, year={2022} }","mla":"Schramm, Britta, et al. “A Review on the Modeling of the Clinching Process Chain - Part II: Joining Process.” Journal of Advanced Joining Processes, 100134, Elsevier BV, 2022, doi:10.1016/j.jajp.2022.100134."},"department":[{"_id":"143"},{"_id":"157"}],"author":[{"id":"4668","last_name":"Schramm","full_name":"Schramm, Britta","first_name":"Britta"},{"last_name":"Friedlein","first_name":"Johannes","full_name":"Friedlein, Johannes"},{"last_name":"Gröger","first_name":"Benjamin","full_name":"Gröger, Benjamin"},{"first_name":"Christian Roman","full_name":"Bielak, Christian Roman","last_name":"Bielak","id":"34782"},{"id":"7850","last_name":"Bobbert","full_name":"Bobbert, Mathias","first_name":"Mathias"},{"full_name":"Gude, Maik","first_name":"Maik","last_name":"Gude"},{"first_name":"Gerson","full_name":"Meschut, Gerson","last_name":"Meschut","id":"32056","orcid":"0000-0002-2763-1246"},{"last_name":"Wallmersperger","full_name":"Wallmersperger, Thomas","first_name":"Thomas"},{"last_name":"Mergheim","first_name":"Julia","full_name":"Mergheim, Julia"}],"title":"A Review on the Modeling of the Clinching Process Chain - Part II: Joining Process","doi":"10.1016/j.jajp.2022.100134","project":[{"grant_number":"418701707","name":"TRR 285: TRR 285","_id":"130"},{"_id":"143","name":"TRR 285 – B04: TRR 285 - Subproject B04"},{"_id":"139","name":"TRR 285 – A05: TRR 285 - Subproject A05"},{"name":"TRR 285 – A03: TRR 285 - Subproject A03","_id":"137"},{"_id":"135","name":"TRR 285 – A01: TRR 285 - Subproject A01"},{"name":"TRR 285 – B03: TRR 285 - Subproject B03","_id":"142"}],"_id":"34068","date_updated":"2023-04-28T11:31:03Z","article_number":"100134","publisher":"Elsevier BV","date_created":"2022-11-14T08:53:07Z","quality_controlled":"1","publication":"Journal of Advanced Joining Processes","status":"public","language":[{"iso":"eng"}],"publication_identifier":{"issn":["2666-3309"]},"year":"2022","type":"journal_article"},{"intvolume":" 59","author":[{"last_name":"Rozo Vasquez","full_name":"Rozo Vasquez, Julian","first_name":"Julian"},{"last_name":"Kanagarajah","first_name":"Hanigah","full_name":"Kanagarajah, Hanigah"},{"id":"36287","last_name":"Arian","first_name":"Bahman","full_name":"Arian, Bahman"},{"last_name":"Kersting","first_name":"Lukas","full_name":"Kersting, Lukas"},{"id":"233","last_name":"Homberg","full_name":"Homberg, Werner","first_name":"Werner"},{"id":"552","last_name":"Trächtler","first_name":"Ansgar","full_name":"Trächtler, Ansgar"},{"first_name":"Frank","full_name":"Walther, Frank","last_name":"Walther"}],"department":[{"_id":"156"},{"_id":"153"},{"_id":"241"}],"citation":{"apa":"Rozo Vasquez, J., Kanagarajah, H., Arian, B., Kersting, L., Homberg, W., Trächtler, A., & Walther, F. (2022). Coupled microscopic and micromagnetic depth-specific analysis of plastic deformation and phase transformation of metastable austenitic steel AISI 304L by flow forming. Practical Metallography, 59(11), 660–675. https://doi.org/10.1515/pm-2022-0064","ama":"Rozo Vasquez J, Kanagarajah H, Arian B, et al. Coupled microscopic and micromagnetic depth-specific analysis of plastic deformation and phase transformation of metastable austenitic steel AISI 304L by flow forming. Practical Metallography. 2022;59(11):660-675. doi:10.1515/pm-2022-0064","chicago":"Rozo Vasquez, Julian, Hanigah Kanagarajah, Bahman Arian, Lukas Kersting, Werner Homberg, Ansgar Trächtler, and Frank Walther. “Coupled Microscopic and Micromagnetic Depth-Specific Analysis of Plastic Deformation and Phase Transformation of Metastable Austenitic Steel AISI 304L by Flow Forming.” Practical Metallography 59, no. 11 (2022): 660–75. https://doi.org/10.1515/pm-2022-0064.","ieee":"J. Rozo Vasquez et al., “Coupled microscopic and micromagnetic depth-specific analysis of plastic deformation and phase transformation of metastable austenitic steel AISI 304L by flow forming,” Practical Metallography, vol. 59, no. 11, pp. 660–675, 2022, doi: 10.1515/pm-2022-0064.","mla":"Rozo Vasquez, Julian, et al. “Coupled Microscopic and Micromagnetic Depth-Specific Analysis of Plastic Deformation and Phase Transformation of Metastable Austenitic Steel AISI 304L by Flow Forming.” Practical Metallography, vol. 59, no. 11, Walter de Gruyter GmbH, 2022, pp. 660–75, doi:10.1515/pm-2022-0064.","bibtex":"@article{Rozo Vasquez_Kanagarajah_Arian_Kersting_Homberg_Trächtler_Walther_2022, title={Coupled microscopic and micromagnetic depth-specific analysis of plastic deformation and phase transformation of metastable austenitic steel AISI 304L by flow forming}, volume={59}, DOI={10.1515/pm-2022-0064}, number={11}, journal={Practical Metallography}, publisher={Walter de Gruyter GmbH}, author={Rozo Vasquez, Julian and Kanagarajah, Hanigah and Arian, Bahman and Kersting, Lukas and Homberg, Werner and Trächtler, Ansgar and Walther, Frank}, year={2022}, pages={660–675} }","short":"J. Rozo Vasquez, H. Kanagarajah, B. Arian, L. Kersting, W. Homberg, A. Trächtler, F. Walther, Practical Metallography 59 (2022) 660–675."},"publication_status":"published","language":[{"iso":"eng"}],"year":"2022","publication_identifier":{"issn":["2195-8599","0032-678X"]},"status":"public","date_created":"2022-11-04T08:29:21Z","publisher":"Walter de Gruyter GmbH","date_updated":"2023-05-02T08:19:27Z","_id":"34000","doi":"10.1515/pm-2022-0064","abstract":[{"lang":"eng","text":"Abstract\r\n This paper presents the characterization of the microstructure evolution during flow forming of austenitic stainless steel AISI 304L. Due to plastic deformation of metastable austenitic steel, phase transformation from γ-austenite into α’-martensite occurs. This is initiated by the formation of shear bands as product of the external stresses. By means of coupled microscopic and micromagnetic investigations, a characterization of the microstructure was carried out. In particular, this study shows the distribution of the strain-induced α’-martensite and its influence on material properties like hardness at different depths. The microstructural analyses by means of electron backscattered diffraction (EBSD) technique, evidence a higher amount of α’-martensite (ca. 23 %) close to the outer specimen surface, where the plastic deformation and the direct contact with the forming tool take place. In the middle area (ca. 1.5 mm depth from the outer surface), the portion of transformed α’-martensite drops to 7 % and in the inner surface to 2 %. These results are well correlated with microhardness and micromagnetic measurements at different depths. EBSD and atomic force microscopy (AFM) were used to make a detailed characterization of the topography and degree of deformation of the shear bands. Likewise, the mechanisms of nucleation of α’-martensite were discussed. This research contributes to the development of micromagnetic sensors to monitor the evolution of properties during flow forming. This makes them more suitable for closed-loop property control, which offers possibilities for an application-oriented and more efficient production."}],"title":"Coupled microscopic and micromagnetic depth-specific analysis of plastic deformation and phase transformation of metastable austenitic steel AISI 304L by flow forming","keyword":["Metals and Alloys","Mechanics of Materials","Condensed Matter Physics","Electronic","Optical and Magnetic Materials"],"user_id":"36287","type":"journal_article","publication":"Practical Metallography","quality_controlled":"1","issue":"11","page":"660-675","volume":59},{"publication":"Key Engineering Materials","quality_controlled":"1","type":"journal_article","volume":926,"page":"862-874","title":"Innovative Online Measurement and Modelling Approach for Property-Controlled Flow Forming Processes","abstract":[{"text":"The production of complex multi-functional, high-strength parts is becoming increasingly important in the industry. Especially with small batch size, the incremental flow forming processes can be advantageous. The production of parts with complex geometry and locally graded material properties currently depicts a great challenge in the flow forming process. At this point, the usage of closed-loop control for the shape and properties could be a feasible new solution. The overall aim in this project is to establish an intelligent closed-loop control system for the wall thickness as well as the α’-martensite content of AISI 304L-workpieces in a flow forming process. To reach this goal, a novel sensor concept for online measurements of the wall thickness reduction and the martensite content during forming process is proposed. It includes the setup of a modified flow forming machine and the integration of the sensor system in the machine control. Additionally, a simulation model for the flow forming process is presented which describes the forming process with regard to the plastic workpiece deformation, the induced α’-martensite fraction, and the sensor behavior. This model was used for designing a closed-loop process control of the wall thickness reduction that was subsequently realized at the real plant including online measured feedback from the sensor system.","lang":"eng"}],"doi":"10.4028/p-yp2hj3","user_id":"36287","keyword":["Mechanical Engineering","Mechanics of Materials","General Materials Science"],"publisher":"Trans Tech Publications, Ltd.","date_created":"2022-11-04T08:27:33Z","status":"public","publication_identifier":{"issn":["1662-9795"]},"year":"2022","language":[{"iso":"eng"}],"_id":"33999","date_updated":"2023-05-02T08:19:13Z","author":[{"last_name":"Kersting","full_name":"Kersting, Lukas","first_name":"Lukas"},{"last_name":"Arian","id":"36287","full_name":"Arian, Bahman","first_name":"Bahman"},{"full_name":"Vasquez, Julian Rozo","first_name":"Julian Rozo","last_name":"Vasquez"},{"last_name":"Trächtler","id":"552","full_name":"Trächtler, Ansgar","first_name":"Ansgar"},{"id":"233","last_name":"Homberg","full_name":"Homberg, Werner","first_name":"Werner"},{"last_name":"Walther","first_name":"Frank","full_name":"Walther, Frank"}],"intvolume":" 926","publication_status":"published","citation":{"short":"L. Kersting, B. Arian, J.R. Vasquez, A. Trächtler, W. Homberg, F. Walther, Key Engineering Materials 926 (2022) 862–874.","bibtex":"@article{Kersting_Arian_Vasquez_Trächtler_Homberg_Walther_2022, title={Innovative Online Measurement and Modelling Approach for Property-Controlled Flow Forming Processes}, volume={926}, DOI={10.4028/p-yp2hj3}, journal={Key Engineering Materials}, publisher={Trans Tech Publications, Ltd.}, author={Kersting, Lukas and Arian, Bahman and Vasquez, Julian Rozo and Trächtler, Ansgar and Homberg, Werner and Walther, Frank}, year={2022}, pages={862–874} }","mla":"Kersting, Lukas, et al. “Innovative Online Measurement and Modelling Approach for Property-Controlled Flow Forming Processes.” Key Engineering Materials, vol. 926, Trans Tech Publications, Ltd., 2022, pp. 862–74, doi:10.4028/p-yp2hj3.","ieee":"L. Kersting, B. Arian, J. R. Vasquez, A. Trächtler, W. Homberg, and F. Walther, “Innovative Online Measurement and Modelling Approach for Property-Controlled Flow Forming Processes,” Key Engineering Materials, vol. 926, pp. 862–874, 2022, doi: 10.4028/p-yp2hj3.","chicago":"Kersting, Lukas, Bahman Arian, Julian Rozo Vasquez, Ansgar Trächtler, Werner Homberg, and Frank Walther. “Innovative Online Measurement and Modelling Approach for Property-Controlled Flow Forming Processes.” Key Engineering Materials 926 (2022): 862–74. https://doi.org/10.4028/p-yp2hj3.","ama":"Kersting L, Arian B, Vasquez JR, Trächtler A, Homberg W, Walther F. Innovative Online Measurement and Modelling Approach for Property-Controlled Flow Forming Processes. Key Engineering Materials. 2022;926:862-874. doi:10.4028/p-yp2hj3","apa":"Kersting, L., Arian, B., Vasquez, J. R., Trächtler, A., Homberg, W., & Walther, F. (2022). Innovative Online Measurement and Modelling Approach for Property-Controlled Flow Forming Processes. Key Engineering Materials, 926, 862–874. https://doi.org/10.4028/p-yp2hj3"},"department":[{"_id":"156"},{"_id":"153"},{"_id":"241"}]},{"publication_status":"published","citation":{"bibtex":"@article{Stallmeister_Tröster_2022, title={In-Mold-Assembly of Hybrid Bending Structures by Compression Molding}, volume={926}, DOI={10.4028/p-5fxp53}, journal={Key Engineering Materials}, publisher={Trans Tech Publications, Ltd.}, author={Stallmeister, Tim and Tröster, Thomas}, year={2022}, pages={1457–1467} }","mla":"Stallmeister, Tim, and Thomas Tröster. “In-Mold-Assembly of Hybrid Bending Structures by Compression Molding.” Key Engineering Materials, vol. 926, Trans Tech Publications, Ltd., 2022, pp. 1457–67, doi:10.4028/p-5fxp53.","short":"T. Stallmeister, T. Tröster, Key Engineering Materials 926 (2022) 1457–1467.","apa":"Stallmeister, T., & Tröster, T. (2022). In-Mold-Assembly of Hybrid Bending Structures by Compression Molding. Key Engineering Materials, 926, 1457–1467. https://doi.org/10.4028/p-5fxp53","ama":"Stallmeister T, Tröster T. In-Mold-Assembly of Hybrid Bending Structures by Compression Molding. Key Engineering Materials. 2022;926:1457-1467. doi:10.4028/p-5fxp53","ieee":"T. Stallmeister and T. Tröster, “In-Mold-Assembly of Hybrid Bending Structures by Compression Molding,” Key Engineering Materials, vol. 926, pp. 1457–1467, 2022, doi: 10.4028/p-5fxp53.","chicago":"Stallmeister, Tim, and Thomas Tröster. “In-Mold-Assembly of Hybrid Bending Structures by Compression Molding.” Key Engineering Materials 926 (2022): 1457–67. https://doi.org/10.4028/p-5fxp53."},"department":[{"_id":"9"},{"_id":"149"},{"_id":"321"}],"author":[{"last_name":"Stallmeister","id":"45538","first_name":"Tim","full_name":"Stallmeister, Tim"},{"full_name":"Tröster, Thomas","first_name":"Thomas","last_name":"Tröster","id":"553"}],"intvolume":" 926","_id":"32869","date_updated":"2023-05-03T07:44:40Z","publisher":"Trans Tech Publications, Ltd.","date_created":"2022-08-17T07:28:31Z","status":"public","publication_identifier":{"issn":["1662-9795"]},"year":"2022","language":[{"iso":"eng"}],"user_id":"14931","keyword":["Mechanical Engineering","Mechanics of Materials","General Materials Science"],"title":"In-Mold-Assembly of Hybrid Bending Structures by Compression Molding","doi":"10.4028/p-5fxp53","abstract":[{"lang":"eng","text":"The further development of in-mold-assembly (IMA) technologies for structural hybrid components is of great importance for increasing the economic efficiency and thus the application potential. This paper presents an innovative IMA process concept for the manufacturing of bending loaded hybrid components consisting of two outer metal belts and an inner core structure made of glass mat reinforced thermoplastic (GMT). In this process, the core structure, which is provided with stiffening ribs and functional elements, is formed and joined to two metal belts in one single step. For experimental validation of the concept, the development of a prototypic molding tool and the manufacturing of hybrid beams including process parameters are described. Three-point bending tests and optical measurement technologies are used to characterize the failure behavior and mechanical properties of the produced hybrid beams. It was found that the innovative IMA process enables the manufacturing of hybrid components with high energy absorption and low weight in one step. The mass-specific energy absorption is increased by 693 % compared to pure GMT beams."}],"volume":926,"page":"1457-1467","quality_controlled":"1","publication":"Key Engineering Materials","type":"journal_article"},{"citation":{"short":"I. Gräßler, C. Oleff, D. Preuß, Applied Sciences 12 (2022).","mla":"Gräßler, Iris, et al. “Proactive Management of Requirement Changes in the Development of Complex Technical Systems.” Applied Sciences, vol. 12, no. 4, 1874, MDPI AG, 2022, doi:10.3390/app12041874.","bibtex":"@article{Gräßler_Oleff_Preuß_2022, title={Proactive Management of Requirement Changes in the Development of Complex Technical Systems}, volume={12}, DOI={10.3390/app12041874}, number={41874}, journal={Applied Sciences}, publisher={MDPI AG}, author={Gräßler, Iris and Oleff, Christian and Preuß, Daniel}, year={2022} }","chicago":"Gräßler, Iris, Christian Oleff, and Daniel Preuß. “Proactive Management of Requirement Changes in the Development of Complex Technical Systems.” Applied Sciences 12, no. 4 (2022). https://doi.org/10.3390/app12041874.","ieee":"I. Gräßler, C. Oleff, and D. Preuß, “Proactive Management of Requirement Changes in the Development of Complex Technical Systems,” Applied Sciences, vol. 12, no. 4, Art. no. 1874, 2022, doi: 10.3390/app12041874.","apa":"Gräßler, I., Oleff, C., & Preuß, D. (2022). Proactive Management of Requirement Changes in the Development of Complex Technical Systems. Applied Sciences, 12(4), Article 1874. https://doi.org/10.3390/app12041874","ama":"Gräßler I, Oleff C, Preuß D. Proactive Management of Requirement Changes in the Development of Complex Technical Systems. Applied Sciences. 2022;12(4). doi:10.3390/app12041874"},"publication_status":"published","department":[{"_id":"152"}],"author":[{"orcid":"0000-0001-5765-971X","id":"47565","last_name":"Gräßler","full_name":"Gräßler, Iris","first_name":"Iris"},{"id":"41188","last_name":"Oleff","full_name":"Oleff, Christian","first_name":"Christian","orcid":"0000-0002-0983-1850"},{"id":"40253","last_name":"Preuß","full_name":"Preuß, Daniel","first_name":"Daniel"}],"intvolume":" 12","_id":"30213","date_updated":"2023-05-03T08:40:30Z","date_created":"2022-03-08T12:37:42Z","publisher":"MDPI AG","language":[{"iso":"eng"}],"year":"2022","publication_identifier":{"issn":["2076-3417"]},"status":"public","keyword":["Fluid Flow and Transfer Processes","Computer Science Applications","Process Chemistry and Technology","General Engineering","Instrumentation","General Materials Science"],"user_id":"5905","title":"Proactive Management of Requirement Changes in the Development of Complex Technical Systems","abstract":[{"text":"Requirement changes and cascading effects of change propagation are major sources of inefficiencies in product development and increase the risk of project failure. Proactive change management of requirement changes yields the potential to handle such changes efficiently. A systematic approach is required for proactive change management to assess and reduce the risk of a requirement change with appropriate effort in industrial application. Within the paper at hand, a novel method for Proactive Management of Requirement Changes (ProMaRC) is presented. It is developed in close collaboration with industry experts and evaluated based on workshops, pilot users’ feedback, three industrial case studies from the automotive industry and five development projects from research. To limit the application effort, an automated approach for dependency analysis based on the machine learning technique BERT and semi-automated assessment of change likelihood and impact using a modified PageRank algorithm is developed. Applying the method, the risks of requirement changes are assessed systematically and reduced by means of proactive change measures. Evaluation shows high performance of dependency analysis and confirms the applicability and usefulness of the method. This contribution opens up the research space of proactive risk management for requirement changes which is currently almost unexploited. It enables more efficient product development.","lang":"eng"}],"doi":"10.3390/app12041874","volume":12,"article_number":"1874","issue":"4","publication":"Applied Sciences","quality_controlled":"1","type":"journal_article"},{"author":[{"first_name":"Hammad","full_name":"Ahmed, Hammad","last_name":"Ahmed"},{"last_name":"Intaravanne","first_name":"Yuttana","full_name":"Intaravanne, Yuttana"},{"last_name":"Ming","first_name":"Yang","full_name":"Ming, Yang"},{"first_name":"Muhammad Afnan","full_name":"Ansari, Muhammad Afnan","last_name":"Ansari"},{"first_name":"Gerald S.","full_name":"Buller, Gerald S.","last_name":"Buller"},{"first_name":"Thomas","full_name":"Zentgraf, Thomas","id":"30525","last_name":"Zentgraf","orcid":"0000-0002-8662-1101"},{"last_name":"Chen","full_name":"Chen, Xianzhong","first_name":"Xianzhong"}],"article_type":"original","intvolume":" 34","publication_status":"published","citation":{"short":"H. Ahmed, Y. Intaravanne, Y. Ming, M.A. Ansari, G.S. Buller, T. Zentgraf, X. Chen, Advanced Materials 34 (2022).","mla":"Ahmed, Hammad, et al. “Multichannel Superposition of Grafted Perfect Vortex Beams.” Advanced Materials, vol. 34, no. 30, 2203044, Wiley, 2022, doi:10.1002/adma.202203044.","bibtex":"@article{Ahmed_Intaravanne_Ming_Ansari_Buller_Zentgraf_Chen_2022, title={Multichannel Superposition of Grafted Perfect Vortex Beams}, volume={34}, DOI={10.1002/adma.202203044}, number={302203044}, journal={Advanced Materials}, publisher={Wiley}, author={Ahmed, Hammad and Intaravanne, Yuttana and Ming, Yang and Ansari, Muhammad Afnan and Buller, Gerald S. and Zentgraf, Thomas and Chen, Xianzhong}, year={2022} }","chicago":"Ahmed, Hammad, Yuttana Intaravanne, Yang Ming, Muhammad Afnan Ansari, Gerald S. Buller, Thomas Zentgraf, and Xianzhong Chen. “Multichannel Superposition of Grafted Perfect Vortex Beams.” Advanced Materials 34, no. 30 (2022). https://doi.org/10.1002/adma.202203044.","ieee":"H. Ahmed et al., “Multichannel Superposition of Grafted Perfect Vortex Beams,” Advanced Materials, vol. 34, no. 30, Art. no. 2203044, 2022, doi: 10.1002/adma.202203044.","apa":"Ahmed, H., Intaravanne, Y., Ming, Y., Ansari, M. A., Buller, G. S., Zentgraf, T., & Chen, X. (2022). Multichannel Superposition of Grafted Perfect Vortex Beams. Advanced Materials, 34(30), Article 2203044. https://doi.org/10.1002/adma.202203044","ama":"Ahmed H, Intaravanne Y, Ming Y, et al. Multichannel Superposition of Grafted Perfect Vortex Beams. Advanced Materials. 2022;34(30). doi:10.1002/adma.202203044"},"department":[{"_id":"15"},{"_id":"230"},{"_id":"289"},{"_id":"623"}],"publisher":"Wiley","date_created":"2022-06-20T11:05:50Z","status":"public","year":"2022","publication_identifier":{"issn":["0935-9648","1521-4095"]},"language":[{"iso":"eng"}],"_id":"32068","date_updated":"2023-05-12T11:20:44Z","title":"Multichannel Superposition of Grafted Perfect Vortex Beams","abstract":[{"lang":"eng","text":"Inspired by plant grafting, grafted vortex beams can be formed through grafting two or more helical phase profiles of optical vortex beams. Recently, grafted perfect vortex beams (GPVBs) have attracted much attention due to their unique optical properties and potential applications. However, the current method to generate and manipulate GPVBs requires a complex and bulky optical system, hindering further investigation and limiting its practical applications. Here, a compact metasurface approach for generating and manipulating GPVBs in multiple channels is proposed and demonstrated, which eliminates the need for such a complex optical setup. A single metasurface is utilized to realize various superpositions of GPVBs with different combinations of topological charges in four channels, leading to asymmetric singularity distributions. The positions of singularities in the superimposed beam can be further modulated by introducing an initial phase difference in the metasurface design. The work demonstrates a compact metasurface platform that performs a sophisticated optical task that is very challenging with conventional optics, opening opportunities for the investigation and applications of GPVBs in a wide range of emerging application areas, such as singular optics and quantum science."}],"doi":"10.1002/adma.202203044","user_id":"30525","keyword":["Mechanical Engineering","Mechanics of Materials","General Materials Science"],"quality_controlled":"1","publication":"Advanced Materials","type":"journal_article","volume":34,"issue":"30","article_number":"2203044"}]