Abstract
A finite-element method (FEM) system has been developed, which enables us to perform structural analyses by using measured data obtained by 3D measurement system such as X-ray or neutron beam computed tomography (CT). This system allows us to use more realistic model of industrial products than models generated by conventional method based on CAD. On the other hand, the FEM solver included in this system employs the elastoplastic material model and the updated Lagrangian rate formulation to describe finite deformation problems. With these features, the solver is applicable to a variety of manufacturing processes such as sheet metal forming. In this study, Cockcroft and Latham's ductile fracture criterion was introduced into this code to simulate shear-cutting processes. Several experiments with ductile fracture propagation were carried out and the results were compared with those obtained by FE simulations made by STAMP3D. The robustness and accuracy of the developed FE code for the simulations of metal forming processes with ductile fracture such as shearing process were proved in this study. The above mentioned FEM system is planned to be coupled with crystal plasticity analysis solver so that the results can be verified by comparing the crystal orientation distribution obtained by neutron sources.
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