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RESEARCH PAPERS

A Statistical Theory for the Fracture of Brittle Structures Subjected to Nonuniform Polyaxial Stresses

[+] Author and Article Information
S. B. Batdorf

Laboratory Operations, The Aerospace Corporation, El Segundo, Calif.

J. G. Crose

Prototype Development Associates, Costa Mesa, Calif.

J. Appl. Mech 41(2), 459-464 (Jun 01, 1974) (6 pages) doi:10.1115/1.3423310 History: Received February 01, 1973; Revised September 01, 1973; Online July 12, 2010

Abstract

A weakest link theory for macroscopically homogeneous isotropic materials containing randomly oriented microcracks uniformly distributed in location is developed under the assumption that fracture depends only on the macroscopic stress normal to a crack plane. The function representing the number of cracks per unit volume failing at each value of normal stress is expanded as a Taylor series with coefficients determined from tensile test data. This function is used without additional assumptions to determine the probability of fracture under arbitrary (but not predominantly compressive) stress conditions. The results can be readily incorporated into a finite-element code to predict the failure probability of any structure to which the code applies.

Copyright © 1974 by ASME
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