Structural Designing With Ceramic Materials

[+] Author and Article Information
W. Duckworth, G. Bansal

Battelle Columbus Laboratories, Columbus, Ohio

J. Eng. Power 100(2), 260-266 (Apr 01, 1978) (7 pages) doi:10.1115/1.3446342 History: Received October 21, 1977; Online July 14, 2010


A central problem in attempting to use ceramic materials in demanding structural applications is uncertainty about the stresses to which they can be safely subjected. A ceramic rarely, if ever, exhibits a characteristic failure stress. This stress depends on the nature and distribution of microscopic flaws that intensify stress locally, and fracture initiates at a single “worst” flaw when Griffith’s criterion for crack instability is met. Within the basic framework, theories are available for treating effects of time, size, and stress distribution on failure stress. This paper reviews these theories, and discusses their use in specifying limiting stresses in designing structural members.

Copyright © 1978 by ASME
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