Consistent Mode Mixity for the Interface Crack of the Bimaterial Disc under Diametric Compression Loading

Abstract:

The bimaterial disc specimen with central interface crack under diametric compression loading was simulated using the finite element method (FEM). The mode mixity for the interface crack was controlled by varying the compression angle. The consistent mode mixity independent of the assumed crack-extension size was obtained using the virtual crack closure technique (VCCT) by introducing an arbitrary normalizing length l_G. The relations of the compression angle and the oscillation index ε to the consistent mode mixity were discussed with the simulation results. It found that the critical compression angles corresponding to pure mode ΙΙ got closed to 25⁰ as the absolute value of ε was very small and a fitted formula of the critical compression angle and the absolute value of ε was also obtained.

• Periodical: Applied Mechanics and Materials (Volume 345)
• Pages: 268-271
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.345.268
• Online since: August 2013
• Authors: Zhi Jia Sun, You Tang Li, Hong Yan Duan
• Keywords: Bimaterial Disc, Consistent Mode Mixity, Finite Element Method (FEM), Interface Crack, VCCT

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