Vol. 3, No. 4, 2008

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ISSN: 1559-3959
Interfacial crack kinking subjected to contact effects

Baoxiang X. Shan, Assimina A. Pelegri and Yi Pan

Vol. 3 (2008), No. 4, 591–605
Abstract

We investigate the problem of a kinking crack at a bimaterial interface when the two surfaces are in contact near the crack tip. Using a potential function and the dislocation technique, we relate, by a singular integral equation, the stress intensity factors (SIF) at the kinking crack tip to the SIF before crack kinking. We use Gauss–Chebyshev integration formulas to solve this integral equation numerically. We evaluate the kinking angles from a bimaterial interface under conditions of contact using the maximum energy release rate criterion and compare these angles with our experiments and those in the literature. The interfacial crack is demonstrated by simulation and experiments to kink into the more compliant material at an angle of about 80.

Keywords
complex variables, composites, contact effect, interfacial crack, kinking crack, singular integration
Milestones
Received: 26 March 2007
Accepted: 30 September 2007
Published: 1 June 2008
Authors
Baoxiang X. Shan
Mechanical and Aerospace Engineering
School of Engineering
Rutgers, The State University of New Jersey
98 Brett Road
Piscataway, NJ 08854-8058
United States
Assimina A. Pelegri
Mechanical and Aerospace Engineering
School of Engineering
Rutgers, The State University of New Jersey
98 Brett Road
Piscataway, NJ 08854-8058
United States
Yi Pan
Mechanical and Aerospace Engineering
School of Engineering
Rutgers, The State University of New Jersey
98 Brett Road
Piscataway, NJ 08854-8058
United States