The Steady-State Growing Crack-Tip Field Characteristics of Mode I Elastic-Viscoplastic/Rigid Interface Cracks

Abstract:

The existence of viscosity effect at the interface of double dissimilar materials has an important impact to the distribution of interface crack-tip field and the properties variety of the interface itself. The singularity and viscosity are considered in crack-tip, and the elastic-viscoplastic governing equations of double dissimilar materials at interface crack-tip field are established. The displacement potential function and boundary condition of interface crack-tip are introduced, and the numerical analysis of elstic-viscoplastic/rigid interface for mode I are worked out. The stress-strain fields are obtained at the crack-tip and the variation rules of solutions are discussed according to each parameter. 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 452-453)
• Pages: 113-116
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.452-453.113
• Online since: November 2010
• Authors: Wen Yan Liang, Zhen Qing Wang, Hong Qing Lv
• Keywords: Dynamic Propagation, Elastic-Viscoplastic Material, Interface Crack, Viscosity

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