DYMAT 2009
Volume 2, 2009
DYMAT 2009 - 9th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading
Page(s) 1465 - 1470
Section Constitutive Modeling
Published online 15 September 2009
DYMAT 2009 (2009) 1465-1470
DOI: 10.1051/dymat/2009207

Experimental and numerical analysis of high strain rate response of Ti-6Al-4V titanium alloy

A. Bragov1, A. Konstantinov1, A. Lomunov1, I. Sergeichev1 and B. Fedulov2

1  Research Institute of Mechanics, 603950 Nizhniy Novgorod, Russia
2  Moscow State University, 119234 Moscow, Russia

Published online: 15 September 2009

In the present work the combined experimental and theoretical approach has been applied to study high strain rate behavior and failure of titanium alloy Ti-6Al-4V. For modeling constitutive material response it has been suggested to use the modified Gurson's plasticity model which takes into account a dependence on the type of loading. Rate dependency effects have been added to the initial constitutive equations. Compressive and tensile tests were carried out by means of Split Hopkinson Pressure Bar for determination of dynamic stress-strain curves, strain rate histories, plasticity and failure properties for strain rate range 102–104 s−1. Parameters of the material model were determined using the obtained experimental results. High strain rate tensile tests of cylindrical V-cut specimens and three point bending (Charpy) experiments were carried out for validation of the model. The numerical simulation of dynamic material response was conducted with implementation of the developed material model for the last test schemes.

© EDP Sciences 2009