Strain gradient plasticityInfluence of dissipative lengthscale on stability
Classic rate-independent associative plastic material becomes unstable within the softening regime, the deformation localizes in a zero-thickness region and any numerical analysis produces results dependent on the meshing procedure.
Considering strain gradient effects in plastic materials, we have shown that:
Higher is the dissipative lengthscale introduced, larger is the delay in occuring of instability and wider is the zone where the non-uniform deformation spreads.
- Dal Corso, F. and Willis, J.R. (2011).
Stability of strain gradient plastic materials.
Journal of the Mechanics and Physics of Solids, 59, 1251-1267.
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