MODELLING OF DUCTILE ANISOTROPIC CONTINUUM DAMAGE: EXPERIMENTS AND NUMERICAL ANALYSES

摘要

The paper deals with the continuum modelling of the large strain elastic-plastic deformation behavior of anisotropically damaged ductile metals. Damaged and undamaged configurations are introduced and the model is based on a kinematic description of damage. Different elastic potential functions allow to take into account the effect of damage on the elastic material properties. A generalized yield condition is employed to describe the plastic flow characteristics of the matrix material whereas the damage criterion provides a realistic representation of material degradation. Identification of material parameters is discussed in some detail. The applicability of the proposed continuum damage theory is demonstrated by numerical simulation of the inelastic deformation process of tension specimens of ductile materials.