Numerical Simulations of Localization of Deformation in Quasi-Brittle Materials Within Non-Local Softening Plasticity
J. Bobinski J. Tejchman
Numerical Simulations of Localization of Deformation in Quasi-Brittle Materials Within Non-Local Softening Plasticity - 433-455 p.
The paper presents results of FE-calculations on shear localizations in quasi-brittle materials during both an uniaxial plane strain compression and uniaxial plane strain extension. An elasto-plastic model with a linear Drucker-Prager type criterion using isotropic hardening and softening and non-associated flow rule was used. A non-local extension was applied in a softening regime to capture realistically shear localization and to obtain a well-posed boundary value problem. A characteristic length was incorporated via a weighting function. Attention was focused on the effect of mesh size, mesh alignment, non-local parameter and imperfections on the thickness and inclination of shear localization. Different methods to calculate plastic strain rates were carefully discussed.
1598-8198
Brittle Material
Compression
Extension
Material Softening
Non-Locality
Plasticity
Shear Localization.
Numerical Simulations of Localization of Deformation in Quasi-Brittle Materials Within Non-Local Softening Plasticity - 433-455 p.
The paper presents results of FE-calculations on shear localizations in quasi-brittle materials during both an uniaxial plane strain compression and uniaxial plane strain extension. An elasto-plastic model with a linear Drucker-Prager type criterion using isotropic hardening and softening and non-associated flow rule was used. A non-local extension was applied in a softening regime to capture realistically shear localization and to obtain a well-posed boundary value problem. A characteristic length was incorporated via a weighting function. Attention was focused on the effect of mesh size, mesh alignment, non-local parameter and imperfections on the thickness and inclination of shear localization. Different methods to calculate plastic strain rates were carefully discussed.
1598-8198
Brittle Material
Compression
Extension
Material Softening
Non-Locality
Plasticity
Shear Localization.