MODEL FOR PLASTIC-DEFORMATION AND FRACTURE IN PLANAR DISORDERED MATERIALS

The elastic-plastic behavior and fracture of disordered material under tensile elongation are studied by a computer simulation model. A finite size analysis of the maximum stress shows very significant residue values even for large system sizes and for the maximum disorder in the local density. In the case of ideal plasticity we study various asymptotic behaviors and demonstrate that increasing density disorder and weakening shear stiffness do not contribute to the effective disorder in the same way as in the case of pure elasticity. © 1995 The American Physical Society.