Instability Analysis and Rate-Dependent Failure Criteria for Adiabatic Shear Band Propagation of Ti-6Al-4V

Abstract:

Adiabatic shearing is a typical response of materials under high strain rate loading. Based on the instability analysis for the thermo-viscoplastic constitutive model, a new rate-dependent failure criterion is proposed, where the failure strain decreases with the increment in strain rate. Using the finite element simulation of the Mode-II impact problem for the titanium alloy Ti-6Al-4V, we verified the damage mechanism induced by adiabatic shear band (ASB) under this rate-dependent failure criterion. Also the ASB propagation path and the width of localized shear band are predicted, which is in a good agreement with experimental observation.

• Periodical: Applied Mechanics and Materials (Volumes 66-68)
• Pages: 135-139
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.66-68.135
• Online since: July 2011
• Authors: Li Ma, Jian Xin, Li Ke Wang, Ping Xu
• Keywords: Adiabatic Shear Band (ASB), Rate-Dependent Failure Criteria, Titanium Alloy

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