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Micromorphic two-scale modelling of periodic grid structures

Ralf Jänicke (Institutionen för tillämpad mekanik, Material- och beräkningsmekanik) ; H. Georg Sehlhorst ; Alexander Düster ; Stefan Diebels
International Journal for Multiscale Computational Engineering (1543-1649). Vol. 11 (2013), 2, p. 161-176.
[Artikel, refereegranskad vetenskaplig]

The present contribution focuses on the numerical homogenization of periodic grid structures. In order to investigate the micro-to-macroscale transition, a consistent numerical homogenization scheme will be presented, replacing a heterogeneous Cauchy microcontinuum by a homogeneous micromorphic substitute continuum on the macroscale. The extended degrees of freedom, namely, the microdeformation and its gradient, are to be interpreted in terms of geometrical deformation modes and the related loading conditions of the underlying unit cells. Assuming strain energy equivalence of the macro- and the microscale, the effective constitutive properties of a square and a honeycomb grid structure are identified and quantitatively validated in comparison to reference calculations with microscopic resolution.

Nyckelord: cellular materials, FE2 method, homogenization, micromorphic media, size effects

Denna post skapades 2017-11-23.
CPL Pubid: 253353


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Institutioner (Chalmers)

Institutionen för tillämpad mekanik, Material- och beräkningsmekanik (2005-2017)



Chalmers infrastruktur