CDM Model and its Application to Numerical Simulation on Rotating Band’s Engraving Process

Abstract:

A coupled constitutive model of viscoplasticity and ductile damage for penetration problems has been deduced. The model proposed by Lemaitre was based on the continuum damage mechanics. In the model, large strain, high strain-rate, thermal softening and damage evolution were taken into account. At the meanwhile, Von Mises yield criterion, Johnson-Cook hardening model and Johnson-Cook fracture strain model were adopted. The model was implemented in the explicit finite element code Abaqus\Explicit through the Vumat subroutine by using an efficient explicit time integration algorithm. Based on the model, the rotating band’s engraving process was simulated, at the same time the influence of the stress state on damage evolution and the thermal softening effect was discussed. An effective way to simulate the fire process of gun was afforded.

• Periodical: Applied Mechanics and Materials (Volumes 117-119)
• Pages: 1672-1676
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.117-119.1672
• Online since: October 2011
• Authors: He Yang Sun, Ji Sheng Ma, Long Bo Sheng, Wei Li, Da Lin Wu
• Keywords: Constitutive Model, Nonlinear, Penetration, Progressive Damage and Failure, Stress Updating Algorithm, VUMAT

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