Elastic-Viscoplastic Field at the Mixed-Mode Crack-Tip under Compression and Shear

Abstract:

In the present paper, the mechanical model of dynamic propagation interface crack of the compression-shear mixed mode is proposed by using the elastic-viscoplastic constitutive model. Then the governing equations of propagation crack interface at crack tip are given. The numerical analysis is accomplished for the interface crack of compression-shear mixed mode by introducing a displacement potential function and some boundary conditions at interface crack tip. The distributed regularities of stress-strain fields of interface crack tip are discussed with several special parameters. The numerical results show that the viscosity effect is a main factor of interface propagating at crack-tip field, and the interface crack-tip is a viscoplastic field that is governed by viscosity coefficient、Mach number and singularity exponent.

• Periodical: Key Engineering Materials (Volumes 488-489)
• Pages: 452-455
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.488-489.452
• Online since: September 2011
• Authors: Wen Yan Liang, Zhen Qing Wang, Fang Liu
• Keywords: Dynamic Propagation, Interface Crack, Mixed-Load Parameter, Viscosity

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