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

Abstract:

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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.

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Periodical:

Edited by:

Honghua Tan

Pages:

135-139

DOI:

10.4028/www.scientific.net/AMM.66-68.135

Citation:

L. Ma et al., "Instability Analysis and Rate-Dependent Failure Criteria for Adiabatic Shear Band Propagation of Ti-6Al-4V", Applied Mechanics and Materials, Vols. 66-68, pp. 135-139, 2011

Online since:

July 2011

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$35.00

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