J. Phys. IV France 04 (1994) C8-465-C8-470
A macro- and microscopic study of adiabatic shearing extension of mode-II crack at dynamic loadingL. Wang, X. Dong, S. Hu and J. Yu
Mechanics and Materials Science Research Centre, Ningbo University, Ningbo, Zhejiang 315211, China
The in-plane-shear failure of a dynamic Mode-II crack is studied macro- and microscopically for a titanium alloy Ti-6Al-4V. The experimental results show that such a failure essentially results from an interaction between the precursor adiabatic shear band and the crack extended along the shear band. A two-variable (KII and KII) thermo-viscoplastic instability criterion for the adiabatic in-plane-shear initiation of a Mode-II crack under dynamic loading is proposed. The theoretical predictions are in good agreement with the experimental results.
© EDP Sciences 1994