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Rate of change of J-integral in creep-fatigue condition
  • Abhishek Tiwari
Abhishek Tiwari
Indian Institute of Technology Ropar

Corresponding Author:abhishek.tiwari@iitrpr.ac.in

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The operational conditions in next generation power plants and other high temperature applications such as turbine blades in jet engines demand the component to perform under extreme conditions where metallic materials show time dependent deformation under cyclic loading conditions. Under creep-fatigue loading condition, the crack tip is exposed to both time dependent and independent plastic deformation. Conventional crack characterizing parameters such as (C t ) , avg has shown good correlation with dominant damage based crack velocity, (d a/d t ) avg . However, the true definition or prediction of crack driving forces under such scenario are vague due to limited theoretical validity of the conventional crack tip characterizing parameters, such as J or C t. In this work, the concept of configurational forces are applied for the first time to understand the creep-fatigue crack growth behaviour. The crack growth is simulated using node-release technique and the configurational forces are calculated using post processing the finite element results for calculation of dJ/dt.
06 Oct 2022Submitted to Fatigue & Fracture of Engineering Materials & Structures
06 Oct 2022Submission Checks Completed
06 Oct 2022Assigned to Editor
09 Oct 2022Reviewer(s) Assigned
05 Nov 2022Review(s) Completed, Editorial Evaluation Pending
09 Nov 2022Editorial Decision: Revise Major
21 Nov 20221st Revision Received
21 Nov 2022Submission Checks Completed
21 Nov 2022Assigned to Editor
25 Nov 2022Reviewer(s) Assigned
15 Dec 2022Review(s) Completed, Editorial Evaluation Pending
15 Feb 2023Editorial Decision: Accept