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Design of step-stress accelerated life tests for estimating the fatigue reliability of structural components based on a finite-element approach
  • Jernej Klemenc,
  • Marko Nagode
Jernej Klemenc
University of Ljubljana
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Marko Nagode
University of Ljubljana
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Abstract

This article describes how a step-stress accelerated life test (SSALT) can be designed for testing the fatigue life and reliability of structural components with a single failure mode. With simple numerical simulations of the crack’s propagation in the notched area of the structural part for different loading levels, the slope of the S-N curve for a structural component is initially estimated. Then, a very few fatigue-life experiments are carried out in the high-cycle domain to determine the intercept of the structure’s S-N curve. By considering the scatter from the material’s P-S-N curve, different SSALT designs for the structural component can be composed and checked for their expected acceleration factor. The procedure is experimentally validated for the case of a notched specimen and two different SSALT designs. From the results it can be concluded that the predicted durations of the SSALT experiments correlate well with the real experiments.

Peer review status:Published

06 Nov 2020Submitted to Fatigue & Fracture of Engineering Materials & Structures
07 Nov 2020Submission Checks Completed
07 Nov 2020Assigned to Editor
13 Nov 2020Reviewer(s) Assigned
22 Dec 2020Review(s) Completed, Editorial Evaluation Pending
27 Dec 2020Editorial Decision: Revise Major
03 Feb 20211st Revision Received
04 Feb 2021Assigned to Editor
04 Feb 2021Submission Checks Completed
05 Feb 2021Reviewer(s) Assigned
01 Mar 2021Review(s) Completed, Editorial Evaluation Pending
03 Mar 2021Editorial Decision: Revise Minor
04 Mar 20212nd Revision Received
04 Mar 2021Assigned to Editor
04 Mar 2021Submission Checks Completed
07 Mar 2021Review(s) Completed, Editorial Evaluation Pending
07 Mar 2021Editorial Decision: Accept
22 Mar 2021Published in Fatigue & Fracture of Engineering Materials & Structures. 10.1111/ffe.13452