Free-Edge Stress Intensity Factor for a Bonded Ductile Layer Subjected to Shear

[+] Author and Article Information
E. D. Reedy

Sandia National Laboratories, Albuquerque, NM 87185

J. Appl. Mech 60(3), 715-720 (Sep 01, 1993) (6 pages) doi:10.1115/1.2900863 History: Received November 15, 1990; Revised March 25, 1992; Online March 31, 2008


The stress state found in a thin, power-law hardening ductile layer bonded between a pair of rigid adherends and subjected to a shear loading is investigated. Within the context of a work-hardening plasticity theory, a stress singularity of type Krδ (δ < 0) exists at the point where the interface between one of the rigid adherends and the ductile layer intersects the stress-free edge. The intensity of this singularity (i.e., K ) has been calculated for a plane strain condition using a technique that combines results of an asymptotic analysis of the stress singularity with those of a detailed finite element analysis. A dead-soft aluminum layer is considered first with emphasis placed on an assessment of the region dominated by the plastic stress singularity. Results for a fully plastic layer with negligible elastic strains are presented next. The relation defining the fully plastic, free-edge stress intensity factor for a shear loading depends only on a characteristic shear stress, layer thickness, and the layer’s hardening exponent.

Copyright © 1993 by The American Society of Mechanical Engineers
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