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RESEARCH PAPERS

An Examination of a Proposed Method for Evaluating Nonlinear Effects in Fracture Assessment

[+] Author and Article Information
N. J. I. Adams, H. G. Munro

Department of Mechanical Engineering, Royal Military College of Science, Wilts, England

J. Pressure Vessel Technol 98(1), 40-45 (Feb 01, 1976) (6 pages) doi:10.1115/1.3454322 History: Received March 28, 1975; Online October 25, 2010

Abstract

A proposal put forward by Liebowitz and Eftis suggests a method of accounting for nonlinear behavior observed in fracture. A simple model analysis of a center crack sheet and supporting experimental results, indicate that the corrected toughness based on load point displacement will not be single valued for a specific material. It is established that both the correction factor and deviation from linearity due to cracktip yielding vary with specimen length. Additionally, tests on compact tension specimens indicate that difficulties exist when trying to correlate corrected toughness values from one specimen configuration to another.

Copyright © 1976 by ASME
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