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Abstract: Some criteria of metal ductile fracture are introduced,
including empirical criteria derived from experiments and criteria based
on continuum damage mechanics. In finite element simulation for large
deformation, crack generation and propagation can be modeled by element
deletion, element split and element separation, which are investigated.
Applied some criteria and element deletion method, fracture occurred is
simulated in sheet blanking, orthogonal metal cutting and cold forward
extrusion processing.
Key words: Ductile fracture Metal forming FEM
CLC No: TG111.91
TG301
国家自然科学基金资助项目(50205013,
59825117). Received 20020830, received in revised form 20021130
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