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Prediction of Accurate Mixed Mode Fatigue Crack Growth Curves using the Paris’ Law

  • S. Sajith
  • K. S. R. Krishna MurthyEmail author
  • P. S. Robi
Original Contribution

Abstract

Accurate information regarding crack growth times and structural strength as a function of the crack size is mandatory in damage tolerance analysis. Various equivalent stress intensity factor (SIF) models are available for prediction of mixed mode fatigue life using the Paris’ law. In the present investigation these models have been compared to assess their efficacy in prediction of the life close to the experimental findings as there are no guidelines/suggestions available on selection of these models for accurate and/or conservative predictions of fatigue life. Within the limitations of availability of experimental data and currently available numerical simulation techniques, the results of present study attempts to outline models that would provide accurate and conservative life predictions.

Keywords

Mixed mode Fatigue Crack growth Paris’ law Stress intensity factor 

Notes

Acknowledgements

The authors are thankful to Cornell Fracture Group, Cornell University, New York for allowing authors to use the FRANC2D software.

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Copyright information

© The Institution of Engineers (India) 2017

Authors and Affiliations

  • S. Sajith
    • 1
  • K. S. R. Krishna Murthy
    • 1
    Email author
  • P. S. Robi
    • 1
  1. 1.Department of Mechanical EngineeringIndian Institute of Technology GuwahatiGuwahatiIndia

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