We analyze in two dimensions the mechanical behavior of materials with granular microstructures modeled by means of a variationally formulated strain-gradient continuum approach based on micromechanics and show that it can capture microstructural-size-dependent effects. Tension-compression asymmetry of grain-assembly interactions, as well as microscale damage, is taken into account and the continuum scale is linked to the grain-scale mechanisms. Numerical results are provided for finite deformations and substantiate previous research. As expected, results show interesting size-dependent effects that are typical of strain-gradient modeling.
Two-dimensional analysis of size effects in strain-gradient granular solids with damage-induced anisotropy evolution / Maksimov, V.; Barchiesi, E.; Misra, A.; Placidi, L.; Timofeev, D.. - In: JOURNAL OF ENGINEERING MECHANICS. - ISSN 0733-9399. - 147:11(2021), p. 04021098. [10.1061/(ASCE)EM.1943-7889.0002010]
Two-dimensional analysis of size effects in strain-gradient granular solids with damage-induced anisotropy evolution
Barchiesi E.;
2021-01-01
Abstract
We analyze in two dimensions the mechanical behavior of materials with granular microstructures modeled by means of a variationally formulated strain-gradient continuum approach based on micromechanics and show that it can capture microstructural-size-dependent effects. Tension-compression asymmetry of grain-assembly interactions, as well as microscale damage, is taken into account and the continuum scale is linked to the grain-scale mechanisms. Numerical results are provided for finite deformations and substantiate previous research. As expected, results show interesting size-dependent effects that are typical of strain-gradient modeling.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.