Photoelastic Determination of Stress Intensity Factor of an Interfacial Crack in a Bi-material

Author:

Lu Hua1,Chiang F. P.1

Affiliation:

1. Laboratory for Experimental Mechanics Research, Department of Mechanical Engineering, State University of New York, Stony Brook, NY 11790-2300

Abstract

The stress intensity factor of an interfacial crack in a bi-material can be represented by a complex vector whose phase changes as a function of r, the radial distance from a crack tip. Two photoelasticity approaches are proposed for the determination of both the magnitude and the phase angle of this complex vector. It is shown that within the K-dominated zone the complex stress intensity factor can be determined at any r and then converted to any other r. The case of an interfacial crack under remote tension is used as an example for the illustration of the proposed techniques.

Publisher

ASME International

Subject

Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics

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