Reference : Generalized quasicontinuum modeling of metallic lattices with geometrical and materia...
Scientific journals : Article
Engineering, computing & technology : Civil engineering
Computational Sciences
http://hdl.handle.net/10993/44155
Generalized quasicontinuum modeling of metallic lattices with geometrical and material nonlinearity and variability
English
Chen, Li mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit >]
Beex, Lars mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit >]
Berke, Peter mailto [Université Libre de Bruxelles - ULB > Ecole polytechnique de Bruxelles > BATir]
Massart, Thierry mailto []
Bordas, Stéphane mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit >]
1-Jul-2020
Computer Methods in Applied Mechanics and Engineering
Elsevier
366
112878
Yes (verified by ORBilu)
International
0045-7825
[en] Metallic lattice ; Body Centered Cubic (BCC) ; Generalized quasicontinuum ; 3D co-rotational beam ; Plastic hinge
[en] We propose a generalized quasicontinuum method to model the mechanical response of 3D lattice structures. The method relies on the spatial coupling of fully-resolved domains and coarse-grained domains. In the fully-resolved domain, the full micro-structure is taken into account. In the coarse-grained domain, the kinematics of the micro-structure are individually interpolated based on their connectivity. On top of that, the contributions of the microstructure to the governing equations
in the coarse-grained domain are sampled using only a few unit cells. In both domains, geometrical and material variability along the strut can be naturally taken into account using a 3D co-rotational beam finite element with embedded plastic hinges. We verify the approach for BCC lattices, demonstrating that the new method can capture both material and geometrical non-linearities of single struts at a fraction of the cost of a direct numerical simulation.
Researchers ; Professionals ; Students
http://hdl.handle.net/10993/44155
10.1016/j.cma.2020.112878
https://www.sciencedirect.com/science/article/pii/S0045782520300608
FnR ; FNR11019432 > Stéphane Bordas > EnLightenIt > Multiscale modelling of lightweight metallic materials accounting for variability of geometrical and material properties > 01/10/2016 > 30/09/2020 > 2015

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