The Cluster of Excellence
Merge Technologies for Multifunctional Lightweight Structures aims towards the fusion of several fundamental production technologies for the resource-efficient production of of high-strength, high-stiffness multifunctional lightweight structures suitable for mass-production.
Each of these production technologies work with a set of different materials like metal (bulk, foam, tape), plastics or textile reinforcements.
They also face the problem of sensor integration during the production process for in-situ measurements as well as for actuating modules.
For different applications (i.e. automotive production), several of these production technologies have to be merged together to fulfill today’s demands of the industry.
However, the properties of such compounds depend to a great extent on the respective manufacturing processes, meaning that the manufacturing and design conditions cannot be examined separately.
In order to guarantee of the quality and safety of the produced components, simulation and prediction of residual stresses induced by different manufacturing processes is necessary.
This very demanding task and the necessary development of adaptive FEM-code is considered within the sub-project IRD F1 of the interdisciplinary cross-sectional research area, IRD F.
The simulations are also utilized for an optimization of the manufacturing process, regarding different process parameters.
This enormous computational task will be supported by efficient data management techniques and the use of distributed computing environments.
The complexity of the optimization task requires multi-criteria optimization strategies that are tailored to the coupled problem at hand.
Commercial software, used for injection-molding simulations, usually do not provide derivative information, therefore derivative-free optimization approaches will be employed in conjunction with reduced-order model functions.
On the other hand, exact derivatives will be used in the case of the FE-analysis of the produced components.
Thus, the overall bivalent optimization problem will be solved in a hybrid manner, using as much derivative information as possible.
The optimization tool will be developed for parallel and distributed computing environments.
Moreover, specific technologies for data management, including data organisation, data conversion and support for fast data access, will be provided.
The efficiency of the developed optimization codes will be shown for some of the demonstrators (CCC, CCX, WERB) within MERGE.
@ARTICLE{OspaldBergermannHerzog:2021:1,
AUTHOR = {Ospald, Felix and Bergermann, Kai and Herzog, Roland},
PUBLISHER = {Springer Science and Business Media LLC},
DATE = {2021-03},
DOI = {10.1007/s00466-021-01997-4},
EPRINT = {2010.05857},
EPRINTTYPE = {arXiv},
JOURNALTITLE = {Computational Mechanics},
NUMBER = {5},
PAGES = {1453--1463},
TITLE = {An extension of the strain transfer principle for fiber reinforced materials},
VOLUME = {67},
}
Johannes Görthofer, Matti Schneider,
Felix Ospald, Andrew Hrymak and Thomas Böhlke
Computational homogenization of sheet molding compound composites based on high fidelity representative volume elements
@ARTICLE{GoerthoferSchneiderOspaldHrymakBoehlke:2020:1,
AUTHOR = {Görthofer, Johannes and Schneider, Matti and Ospald, Felix and Hrymak, Andrew and Böhlke, Thomas},
PUBLISHER = {Elsevier BV},
DATE = {2020-03},
DOI = {10.1016/j.commatsci.2019.109456},
JOURNALTITLE = {Computational Materials Science},
PAGES = {109456},
TITLE = {Computational homogenization of sheet molding compound composites based on high fidelity representative volume elements},
VOLUME = {174},
}
@ONLINE{OspaldHerzog:2020:1,
AUTHOR = {Ospald, Felix and Herzog, Roland},
DATE = {2020-01},
EPRINT = {2001.02203},
EPRINTTYPE = {arXiv},
TITLE = {Short note on a relation between the inverse of the cosine and Carlson's elliptic integral $R_D$},
}
@ARTICLE{Ospald:2019:1,
AUTHOR = {Ospald, Felix},
PUBLISHER = {The Open Journal},
DATE = {2019-02},
DOI = {10.21105/joss.01027},
JOURNALTITLE = {Journal of Open Source Software},
NUMBER = {34},
PAGES = {1027},
TITLE = {fibergen: An introductory tool for FFT-based material homogenization},
VOLUME = {4},
}
Robert Dietze, Niels Goldberg,
Roland Herzog, Susann Hannusch, Michael Hofmann, Jörn Ihlemann, Lothar Kroll, Arnd Meyer,
Felix Ospald, Edgar Peretzki, Gudula Rünger, Hansjörg Schmidt, Norbert Schramm, Rolf Springer, Martin Stockmann and Lars Ulke-Winter
Modellierung, integrative Simulation und Optimierung
Technologiefusion für multifunktionale Leichtbaustrukturen: Ressourceneffizienz durch die Schlüsseltechnologie ``Leichtbau'', p.577-645, 2019
@INBOOK{DietzeGoldbergHerzogHannuschHofmannIhlemannKrollMeyerOspaldPeretzkiRuengerSchmidtSchrammSpringerStockmannUlkeWinter:2019:1,
AUTHOR = {Dietze, Robert and Goldberg, Niels and Herzog, Roland and Hannusch, Susann and Hofmann, Michael and Ihlemann, Jörn and Kroll, Lothar and Meyer, Arnd and Ospald, Felix and Peretzki, Edgar and Rünger, Gudula and Schmidt, Hansjörg and Schramm, Norbert and Springer, Rolf and Stockmann, Martin and Ulke-Winter, Lars},
EDITOR = {Kroll, Lothar},
PUBLISHER = {Springer Berlin Heidelberg},
BOOKTITLE = {Technologiefusion für multifunktionale Leichtbaustrukturen: Ressourceneffizienz durch die Schlüsseltechnologie ``Leichtbau''},
DATE = {2019},
DOI = {10.1007/978-3-662-54734-2_8},
PAGES = {577--645},
TITLE = {Modellierung, integrative Simulation und Optimierung},
}
@THESIS{Ospald:2019:2,
AUTHOR = {Ospald, Felix},
INSTITUTION = {Technische Universität Chemnitz, Germany},
DATE = {2019},
EPRINT = {urn:nbn:de:bsz:ch1-qucosa2-365224},
EPRINTTYPE = {urn},
TITLE = {Contributions to the Simulation and Optimization of the Manufacturing Process and the Mechanical Properties of Short Fiber-Reinforced Plastic Parts},
TYPE = {phdthesis},
}
Jonathan Köbler, Matti Schneider,
Felix Ospald, Heiko Andrä and Ralf Müller
Fiber orientation interpolation for the multiscale analysis of short fiber reinforced composite parts
@ARTICLE{KoeblerSchneiderOspaldAndraeMueller:2018:1,
AUTHOR = {Köbler, Jonathan and Schneider, Matti and Ospald, Felix and Andrä, Heiko and Müller, Ralf},
PUBLISHER = {Springer Science and Business Media LLC},
DATE = {2018-04},
DOI = {10.1007/s00466-017-1478-0},
JOURNALTITLE = {Computational Mechanics},
NUMBER = {6},
PAGES = {729--750},
TITLE = {Fiber orientation interpolation for the multiscale analysis of short fiber reinforced composite parts},
VOLUME = {61},
}
@INPROCEEDINGS{OspaldHerzog:2017:1,
AUTHOR = {Ospald, Felix and Herzog, Roland},
PUBLISHER = {Springer International Publishing},
BOOKTITLE = {Advances in Structural and Multidisciplinary Optimization},
DATE = {2017-12},
DOI = {10.1007/978-3-319-67988-4_65},
NOTE = {Proceedings of the 12th World Congress on Structural and Multidisciplinary Optimization},
PAGES = {850--861},
TITLE = {SIMP based topology optimization for injection molding of SFRPs},
}
@ARTICLE{OspaldHerzog:2017:2,
AUTHOR = {Ospald, Felix and Herzog, Roland},
PUBLISHER = {Wiley-Blackwell},
DATE = {2017-12},
DOI = {10.1002/pamm.201710138},
JOURNALTITLE = {Proceedings in Applied Mathematics and Mechanics},
NUMBER = {1},
PAGES = {337--338},
TITLE = {Topology optimization for injection molding of short fiber-reinforced plastics},
VOLUME = {17},
}
@ARTICLE{GoldbergOspaldSchneider:2017:1,
AUTHOR = {Goldberg, Niels and Ospald, Felix and Schneider, Matti},
PUBLISHER = {Springer Science and Business Media LLC},
DATE = {2017-06},
DOI = {10.1007/s00466-017-1425-0},
JOURNALTITLE = {Computational Mechanics},
NUMBER = {4},
PAGES = {595--611},
TITLE = {A fiber orientation-adapted integration scheme for computing the hyperelastic Tucker average for short fiber reinforced composites},
VOLUME = {60},
}
@ARTICLE{HerzogOspald:2017:1,
AUTHOR = {Herzog, Roland and Ospald, Felix},
PUBLISHER = {John Wiley \& Sons, Ltd},
DATE = {2017},
DOI = {10.1002/nme.5371},
JOURNALTITLE = {International Journal for Numerical Methods in Engineering},
NUMBER = {8},
PAGES = {703--725},
TITLE = {Parameter identification for short fiber-reinforced plastics using optimal experimental design},
VOLUME = {110},
}
Matthias Kabel, Andreas Fink,
Felix Ospald and Matti Schneider
Nonlinear composite voxels and FFT-based homogenization
@INPROCEEDINGS{KabelFinkOspaldSchneider:2016:1,
AUTHOR = {Kabel, Matthias and Fink, Andreas and Ospald, Felix and Schneider, Matti},
BOOKTITLE = {ECCOMAS},
DATE = {2016},
DOI = {10.7712/100016.1944.5977},
TITLE = {Nonlinear composite voxels and FFT-based homogenization},
}
@ARTICLE{OspaldHerzog:2016:1,
AUTHOR = {Ospald, Felix and Herzog, Roland},
DATE = {2016},
DOI = {10.1002/pamm.201610325},
JOURNALTITLE = {Proceedings in Applied Mathematics and Mechanics},
NUMBER = {1},
PAGES = {673--674},
TITLE = {Optimal experimental design to identify the average stress-strain response in short fiber-reinforced plastics},
VOLUME = {16},
}
@ARTICLE{SchneiderOspaldKabel:2016:1,
AUTHOR = {Schneider, Matti and Ospald, Felix and Kabel, Matthias},
DATE = {2016},
DOI = {10.1002/nme.5008},
JOURNALTITLE = {International Journal for Numerical Methods in Engineering},
NUMBER = {9},
PAGES = {693--720},
TITLE = {Computational homogenization of elasticity on a staggered grid},
VOLUME = {105},
}
A model order reduction method for computational homogenization at finite strains on regular grids using hyperelastic laminates to approximate interfaces
Computer Methods in Applied Mechanics and Engineering 309, p.476-496, 2016
@ARTICLE{SchneiderOspaldKabel:2016:2,
AUTHOR = {Schneider, Matti and Ospald, Felix and Kabel, Matthias},
DATE = {2016},
DOI = {10.1016/j.cma.2016.06.021},
JOURNALTITLE = {Computer Methods in Applied Mechanics and Engineering},
PAGES = {476--496},
TITLE = {A model order reduction method for computational homogenization at finite strains on regular grids using hyperelastic laminates to approximate interfaces},
VOLUME = {309},
}
Susann Hannusch, Michael Herzog, Jörn Ihlemann, Lothar Kroll, Arnd Meyer,
Felix Ospald, Gudula Rünger, Rolf Springer, Martin Stockmann and Lars Ulke-Winter
Efficient simulation, optimization, and validation of lightweight structures
Proceedings of the 2nd International MERGE Technologies Conference for Lightweight Structures (IMTC 2015), p.219-227, 2015
@INPROCEEDINGS{HannuschHerzogHofmannIhlemannKrollMeyerOspaldRuengerSpringerStockmannUlkeWinter:2015:1,
AUTHOR = {Hannusch, Susann and Herzog, Roland Hofmann, Michael and Ihlemann, Jörn and Kroll, Lothar and Meyer, Arnd and Ospald, Felix and Rünger, Gudula and Springer, Rolf and Stockmann, Martin and Ulke-Winter, Lars},
BOOKTITLE = {Proceedings of the 2nd International MERGE Technologies Conference for Lightweight Structures (IMTC 2015)},
DATE = {2015},
DOI = {10.1364/ofs.2018.tub6},
PAGES = {219--227},
TITLE = {Efficient simulation, optimization, and validation of lightweight structures},
}
@INPROCEEDINGS{SchneiderOspaldKabel:2015:1,
AUTHOR = {Schneider, Matti and Ospald, Felix and Kabel, Matthias},
BOOKTITLE = {Conference Proceedings of the YIC GACM 2015},
DATE = {2015},
DOI = {10.18154/RWTH-2015-03980},
PAGES = {178--181},
TITLE = {Computational homogenization of elasticity at large deformations on a staggered grid},
}
Michael Hofmann,
Felix Ospald, Hansjorg Schmidt and Rolf Springer
Programming support for the flexible coupling of distributed software components for scientific simulations
Software Engineering and Applications (ICSOFT-EA), 2014 9th International Conference on, p.506-511, 2014
@INPROCEEDINGS{HofmannOspaldSchmidtSpringer:2014:1,
AUTHOR = {Hofmann, Michael and Ospald, Felix and Schmidt, Hansjorg and Springer, Rolf},
BOOKTITLE = {Software Engineering and Applications (ICSOFT-EA), 2014 9th International Conference on},
DATE = {2014-08},
DOI = {10.5220/0005105405060511},
PAGES = {506--511},
TITLE = {Programming support for the flexible coupling of distributed software components for scientific simulations},
}
@ARTICLE{Ospald:2014:1,
AUTHOR = {Ospald, Felix},
DATE = {2014},
DOI = {10.1002/pamm.201410320},
JOURNALTITLE = {Proceedings in Applied Mathematics and Mechanics},
NUMBER = {1},
PAGES = {673--674},
TITLE = {Numerical simulation of injection molding using OpenFOAM},
VOLUME = {14},
}
@MISC{Ospald:2019:3,
AUTHOR = {Ospald, Felix},
URL = {https://github.com/fospald/fibergen},
TITLE = {fibergen: An introductory tool for FFT-based material homogenization},
}
@MISC{Ospald:2018:1,
AUTHOR = {Ospald, Felix},
URL = {https://github.com/fospald/injectionMoldingFoam},
TITLE = {A solver in OpenFOAM for the simulation of injection molding},
}
@MISC{Ospald:2018:2,
AUTHOR = {Ospald, Felix},
URL = {https://github.com/fospald/SFRP_Topology_Optimization},
TITLE = {A Python tool for the topology optimization of short fiber reinforced plastics},
}
