ISSN: 1945-7553
CODEN: JTEVAB
Page Count: 7

A Simple Method for Studying Slow Crack Growth

Williams, DP
Ames Research Center, NASA, Moffett Field, Calif.

Evans, AG
University of California, Los Angeles, Calif.

Abstract

A simple, inexpensive method for studying slow crack growth is described. The method entails measurements of load relaxation at constant displacement using a double torsion specimen. It is demonstrated that the data generated using this technique are in excellent agreement with data obtained using the more complex conventional techniques, for a range of materials—steel, titanium, glass, aluminum oxide, PMMA. These encouraging initial results suggest that additional and more detailed studies using this test procedure are merited.

Keywords:
test method, fracture, fracture mechanics, double torsion, crack propagation, stress corrosion, hydrogen embrittlement, load relaxation

Paper ID: JTE10015J
DOI: 10.1520/JTE10015J
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