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Fatigue Assessment of Notched Steel Including Residual Stresses Obtained by the Rolling Process

G. Nicoletto1, A. Saletti2
Dept. of Industrial Engineering, University of Parma, Parma, Italy
TP Engineering srl, Parma, Italy

Structural Durability & Health Monitoring 2012, 8(2), 131-148. https://doi.org/10.3970/sdhm.2012.008.131

Abstract

Fatigue strengthening of fillets by deep rolling is finding increased application for example in engine crankshaft production for functional and economical reasons. A fatigue design method aimed at exploiting the residual stresses that develop at a notched part following the rolling process is proposed. It is based on the superposition of residual stresses obtained by elastic-plastic FE simulation of the rolling process and the cyclic elastic stresses within a Haigh diagram framework. The fatigue design method is assessed using the experimental evidence obtained by testing notched specimens made of 30NiCrMo12 steel subjected to different rolling process parameters.

Keywords

Fatigue, residual stress, notch, Q&T steel, deep rolling, finite element.

Cite This Article

Nicoletto, G., Saletti, A. (2012). Fatigue Assessment of Notched Steel Including Residual Stresses Obtained by the Rolling Process. Structural Durability & Health Monitoring, 8(2), 131–148.



This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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