Comparison of Continuum Damage Laws Under Uniaxial Creep for an AISI 316 Stainless Steel

  • Tejas Ranjekar
  • Sivasambu Mahesh
Technical Paper


Parameters of five popular continuum damage models are fit to match their creep rate and time to rupture predictions with that of a validated micro-mechanisms based model at a high nominal stress for an austenitic stainless steel. Their predictions are then compared with that of the micro-mechanisms based model at lower stress levels. The creep-strain rate and time to failure predictions of the model due to Wen et al. (Eng Fract Mech 98:169–184, 2013) best agrees with that of the micro-mechanisms based model in the regime of dominance of creep deformation processes. At still lower stress levels, where cavitation-rate is determined by diffusion processes, the Wen et al. model predictions of creep lifetimes become excessively non-conservative. A correction based on a formula due to Cocks and Ashby (Prog Mater Sci 27:189–244, 1982) has been proposed for this regime.


Creep Continuum damage mechanics Damage micro-mechanisms 316-Type austenitic stainless steels 



The authors thank the High Performance Computing Centre at IIT Madras, where the simulations reported here were performed. We also gratefully acknowledge helpful comments from the referee.


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Copyright information

© The Indian Institute of Metals - IIM 2017

Authors and Affiliations

  1. 1.Department of Aerospace EngineeringIndian Institute of Technology, MadrasChennaiIndia

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