Entropy-Based Approach for Fatigue Crack Growth Rate of Dual-Phase Steel

  • Roslinda Idris Universiti Kebangsaan Malaysia
  • Shahrum Abdullah Universiti Kebangsaan Malaysia
  • Prakash Thamburaja Universiti Kebangsaan Malaysia
  • Mohd. Zaidi Omar Universiti Kebangsaan Malaysia
Keywords: Degradation-entropy generation theorem, Dual-phase steel, Entropy generation, Fatigue crack growth rate.

Abstract

This paper presents an entropy-based approach for the fatigue crack growth of dual-phase steel under a constant amplitude loading. According to the degradation-entropy generation theorem, the degradation coefficient can be derived from the correlations of entropy and crack propagation.  The temperature evolutions induced for the duration of the fatigue crack growth tests on the as-received and dual-phase steel till it failed were measured to ensure their validity. The results of the present model and the calculated Paris-regime crack growth data were analysed to reach the conclusion that the temperature at the surface of a specimen during a fatigue crack growth test can be used for the assessment of fatigue crack growth by the intensity of the degradation coefficient. The predicted results showed that the present model could accurately predict the fatigue crack growth rate of dual-phase steel with a regression value (R2) of 0.9952.

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Published
19-11-2018
How to Cite
Idris, R., Abdullah, S., Thamburaja, P., & Omar, M. Z. (2018). Entropy-Based Approach for Fatigue Crack Growth Rate of Dual-Phase Steel. International Journal of Integrated Engineering, 10(5). Retrieved from https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/2536
Section
Special Issue 2018: Mechanical Engineering