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Fatigue Crack Growth on Heterogeneous Stress Fields: Best Analytical Approach

Published online by Cambridge University Press:  15 May 2014

Antonio Martin-Meizoso ,
Jose M. Martinez-Esnaola ,
Asier Bergara  and
Shaun Falconer
Antonio Martin-Meizoso
Affiliation:
CEIT and Tecnun (University of Navarra), Manuel Lardizábal, 15, 20018 San Sebastián, Spain.
Jose M. Martinez-Esnaola
Affiliation:
CEIT and Tecnun (University of Navarra), Manuel Lardizábal, 15, 20018 San Sebastián, Spain.
Asier Bergara
Affiliation:
CEIT and Tecnun (University of Navarra), Manuel Lardizábal, 15, 20018 San Sebastián, Spain.
Shaun Falconer
Affiliation:
University of Glasgow, Department of Mechanical Engineering, James Watt (South) Building, Glasgow, G12 GQQ, United Kingdom.
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Abstract

A way of estimating Stress Intensity Factors is proposed by extending available solutions (solid and crack configurations) to stress fields not considered in available formulations. The accuracy of the proposed estimation is considered with respect to fatigue life assessment and crack shape tracing. It is aimed as very fast initial estimation, in comparison with the use of Finite Elements, in those cases were a high stress gradient is observed: stress concentrations (holes, notches, grooves) or due to surface residual stresses produced by machining techniques or induced –on purpose- to improve fatigue life (for example, by shot-peening), where no SIF solutions are available.

Keywords

fatiguefracturestructural
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1650: Symposium JJ – Materials Fundamentals of Fatigue and Fracture , 2014 , mrsf13-1650-jj05-01
Copyright
Copyright © Materials Research Society 2014 

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References

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