This chapter presents a gradient-enhanced coupled damage-plasticity framework, which is used to model damage development and growth in metal forming operations. The constitutive model is based on a hyperelasto-plasticity formulation in which the yield stress is degraded by a ductile damage variable. The evolution of damage depends on the effective plastic strain through an additional partial differential equation, which precludes pathological localization. To allow for realistic simulations of forming processes, the finite element implementation of the model is extended with an adaptive remeshing scheme. Particular attention is given to the robustness of the remeshing and accompanying transfer of state variables. To be able to perform fully, coupled finite element analyzes crack growth in a robust way. The chapter develops the remeshing-transfer algorithm and shows the final finite element discretization obtained with the algorithm for more or less academic problem geometry.
|Titel||Computational fluid and solid mechanics 2003 : proceedings 2nd MIT conference on computational fluid and solid mechanics, June 17-20, 2003, [Cambridge, Mass.] / Ed. K.J. Bathe|
|Plaats van productie||Amsterdam|
|ISBN van geprinte versie||0-08-044046-0|
|Status||Gepubliceerd - 2003|