Stable Crack Growth in Rate-Dependent Materials With Damage

[+] Author and Article Information
Leif-Olof Fager

Ericsson Network Engineering AB, S-175 26 Järfälla, Sweden

J. L. Bassani

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

J. Eng. Mater. Technol 115(3), 252-261 (Jul 01, 1993) (10 pages) doi:10.1115/1.2904215 History: Received November 16, 1992; Revised December 22, 1992; Online April 29, 2008


A cohesive zone model of the Dugdale-Barenblatt type is used to investigate crack growth under small-scale-creep/damage conditions. The material inside the cohesive zone is described by a power-law viscous overstress relation modified by a one-parameter damage function of the Kachanov type. The stress and displacement profiles in the cohesive zone and the velocity dependence of the fracture toughness are investigated. It is seen that the fracture toughness increases rapidly with the velocity and asymptotically approaches the case that neglects damage.

Copyright © 1993 by The American Society of Mechanical Engineers
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