In metal forming processes such as sheet blanking, severe plastic deformation localizes in a narrow
shear band near blanking clearance, and ductile fracture occurs at the final stage. Because the combinations of
large nonlinear strain localization, displacement discontinuity and ductile fracture brought obstacles to numerical
simulation, a ductile fracture initiation criterion model and an elasto-plastic finite element method (FEM) were
presented to simulate localized severe plastic deformation. Initiation and propagation of cracks were treated by
deletion-and-replacement approach. The distributions and developing trends of effective strain and damage were
predicted, the influence of blanking clearance on fracture was discussed, and an experiment was performed to
explore the forming mechanism.
YU Songa* (虞松), ZHAO Junb (赵军)
. Investigation on Blanking of Thick Sheet Metal Using the Ductile
Fracture Initiation and Propagation Criterion[J]. Journal of Shanghai Jiaotong University(Science), 2012
, 17(5)
: 531
-536
.
DOI: 10.1007/s12204-012-1320-y
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