A Comprehensive Plasticity and Fracture Model for Metal Sheets under Multi-axial Stress and Non-linear Strain Path

Paper #:
  • 2017-01-0315

Published:
  • 2017-03-28
Abstract:
A comprehensive plasticity and fracture model was built for metal sheets with application to sheet forming and vehicle crash simulations. The Bai-Wierzbicki (BW) plasticity model was extended consider material anisotropy, strain rate and high temperature effects in additional to the effect of multiaxial stress states. A fully modularized framework was established to combine isotropic, kinematic, and cross hardening behaviors under non-monotonic loading conditions. The modified Mohr-Coulomb (MMC) fracture model was extended to consider material anisotropy, high temperature effects and nonlinear strain path. The model has been implemented into Abaqus/Explicit as a user material subroutine (VUMAT). Test results on advanced high strength steels, aluminum alloy sheets and magnesium alloy sheets are used to validate the modeling and testing methodologies. Very good correlation was observed between experimental and simulation results.
Also in:
  • SAE International Journal of Engines - V126-3EJ
  • SAE International Journal of Engines - V126-3
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