Comparison of SIF solutions for cracks under rotating bending and their impact upon propagation lifetime of railway axles

Amir Pourheidar, Stefano Beretta*, Daniele Ragazzi, Cemal Baykara

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

5 Citations (Scopus)

Abstract

The stress intensity factor (SIF) is a crucial input parameter for the definition of the inspection intervals based on the damage tolerance approach. In the present work the applicability and precision of existing analytical stress intensity factor solutions for the cracks in railway axle geometries, subjected to rotary bending and residual stresses is discussed, by comparison with a reference set of solutions obtained from finite element (FE) analyses. Both the SIFs and the crack shape evolution are considered, comparing the predicted crack shape growth, from FE and analytical solutions, with a series of experimental data from the literature. Finally, the effect of the different approximations for the propagation lifetime and non-destructive tests (NDT) reliability of railway axles is discussed.

Original languageEnglish
Pages (from-to)610-617
Number of pages8
JournalProcedia Structural Integrity
Volume8
DOIs
Publication statusPublished - 2018
Event46th Conference on Stress Analysis and Mechanical Engineering Design, AIAS 2017 - Pisa, Italy
Duration: 6 Sept 20179 Sept 2017

Bibliographical note

Publisher Copyright:
© 2018 Procedia Structural Integrity. All rights reserved.

Keywords

  • railway axles
  • residual lifetime
  • residual stresses
  • stress intensity factor comparison

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