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A CRITICAL REVIEW OF CRACK TIP STRESS INTENSITY FACTORS FOR SEMI‐ELLIPTIC CRACKS *

A CRITICAL REVIEW OF CRACK TIP STRESS INTENSITY FACTORS FOR SEMI‐ELLIPTIC CRACKS * Several crack tip stress intensity factor solutions have been published for semi‐elliptic, surface breaking cracks in plates subjected to tension or bending forces. These solutions do not agree with each other particularly well and the basis for choosing which one is the best has not been established. In this paper, the development of fatigue crack shape is used as a diagnostic tool to test the accuracy of these theoretical stress intensity solutions in predictive fatigue crack growth calculations. Those solutions giving the best engineering estimate of crack tip stress intensity factors are identified. Single equations are also given for each loading case at the deepest point or surface intersection point of semi‐elliptic cracks in order to facilitate calculations on programmable calculators. A rational basis for calculating the progress of a crack which snaps through the thickness and continues to propagate in a stable way by fatigue is suggested. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Fatigue & Fracture of Engineering Materials and Structures Wiley

A CRITICAL REVIEW OF CRACK TIP STRESS INTENSITY FACTORS FOR SEMI‐ELLIPTIC CRACKS *

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References (28)

Publisher
Wiley
Copyright
Copyright © 1981 Wiley Subscription Services, Inc., A Wiley Company
ISSN
8756-758X
eISSN
1460-2695
DOI
10.1111/j.1460-2695.1981.tb01127.x
Publisher site
See Article on Publisher Site

Abstract

Several crack tip stress intensity factor solutions have been published for semi‐elliptic, surface breaking cracks in plates subjected to tension or bending forces. These solutions do not agree with each other particularly well and the basis for choosing which one is the best has not been established. In this paper, the development of fatigue crack shape is used as a diagnostic tool to test the accuracy of these theoretical stress intensity solutions in predictive fatigue crack growth calculations. Those solutions giving the best engineering estimate of crack tip stress intensity factors are identified. Single equations are also given for each loading case at the deepest point or surface intersection point of semi‐elliptic cracks in order to facilitate calculations on programmable calculators. A rational basis for calculating the progress of a crack which snaps through the thickness and continues to propagate in a stable way by fatigue is suggested.

Journal

Fatigue & Fracture of Engineering Materials and StructuresWiley

Published: Oct 1, 1981

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