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Micromorphic Homogenisation of a Porous Medium: Application to Size Effects and Quasi‐Brittle Damage
Author(s) -
Hütter Geralf,
Skrypnyk Rostyslav
Publication year - 2016
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201610162
Subject(s) - brittleness , softening , porous medium , mechanics , continuum mechanics , finite element method , damage mechanics , materials science , deformation (meteorology) , brittle fracture , porosity , classical mechanics , physics , composite material , thermodynamics , fracture (geology)
The classical theory of continuum mechanics requires that distances over which gradients occur are much larger than the length scales of the microstructure. This requirement is violated if deformation localizes due to material softening which is why the predictions of classical damage models feature certain unrealistic aspects. In the present contribution, a micromorphic model for quasi‐brittle damage, derived through homogenisation, is employed in FEM simulations to overcome this problem. (© 2016 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)