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RESEARCH PAPERS

Interfacial Fracture Mechanics for Anisotropic Bimaterials

[+] Author and Article Information
J. Qu

School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA

J. L. Bassani

Department of Mechanical Engineering and Applied Mechanics, University of Pennsylvania, Philadelphia, PA 19104-6315

J. Appl. Mech 60(2), 422-431 (Jun 01, 1993) (10 pages) doi:10.1115/1.2900810 History: Received August 23, 1990; Revised July 23, 1991; Online March 31, 2008

Abstract

This paper focuses on aspects of fracture mechanics of interface cracks in anisotropic bimaterials. In this case there is a coupling of all three crack-tip fracture modes in the natural interface-crack coordinate system, whereas in the isotropic case, mode 3 is decoupled from modes 1 and 2. This paper intends to shed light on how to interpret the crack-tip fields which are given explicitly along the interface in terms of two (real 3x3) bimaterial matrices W and D . A matric function Y is defined in terms of W and D which determines the coupling and oscillations in the cracktip fields. Explicit expressions for the crack-tip fields and the associated stress intensity factors are given as well as for the energy release rate. The finite (Griffith) interface crack is considered in detail.

Copyright © 1993 by The American Society of Mechanical Engineers
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