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

par Chen, Li ;Berke, Peter ;Massart, Thierry,Jacques ;Bordas, Stéphane P.A.;Beex, Lars A.A.
Référence Mechanics research communications, 126, 104019
Publication Publié, 2022-11-09

Article révisé par les pairs

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Résumé :

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. Themicrostructural 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.