An adaptive multiscale quasicontinuum approach for mechanical simulations of elastoplastic periodic lattices

[en] The quasicontinuum method is a multiscale method that combines locally supported coarse-grained domains, with small regions in which the microstructural model is fully resolved. This contribution proposes the first adaptive formulation of the method for microstructural elastoplasticity. The microstructural model uses an elastoplastic beam description. The indicator for refinement is the occurrence of plastic deformation, such that plasticity can only occur in fully resolved regions. An illustrative numerical example of a scratch test of an elastoplastic Kelvin lattice demonstrates the capabilities of the resulting framework.

Disciplines :

Civil engineering
Aerospace & aeronautics engineering
Materials science & engineering
Mechanical engineering
Engineering, computing & technology: Multidisciplinary, general & others

Author, co-author :

CHEN, Li ; University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Engineering (DoE)

Berke, Peter; Université Libre de Bruxelles - ULB > Building, Architecture and Town Planning (BATir) department > Prof

Massart, Thierry; Université Libre de Bruxelles - ULB > Building, Architecture and Town Planning (BATir) department > Prof

BORDAS, Stéphane ; University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Engineering (DoE)

BEEX, Lars ; University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Engineering (DoE)

External co-authors :

yes

Language :

English

Title :

An adaptive multiscale quasicontinuum approach for mechanical simulations of elastoplastic periodic lattices

Publication date :

2022

Journal title :

Mechanics Research Communications

ISSN :

0093-6413

Publisher :

Elsevier, United Kingdom

Volume :

126

Pages :

104019

Peer reviewed :

Peer Reviewed verified by ORBi

Focus Area :

Computational Sciences

Additional URL :

https://www.sciencedirect.com/science/article/abs/pii/S0093641322001513

FnR Project :

FNR14310624 - Towards Efficient Simulations Of Aggregates Of Slender Bodies., 2019 (01/04/2020-31/03/2023) - Lars Beex

Name of the research project :

ROPETEST

Funders :

FNR - Fonds National de la Recherche
F.R.S.-FNRS - Fonds de la Recherche Scientifique

Available on ORBilu :

since 30 December 2022

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Bibliography

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