A microstructure sensitive modeling approach for fatigue life prediction considering the residual stress effect from heat treatment

Research output: Contribution to journalConference articleScientificpeer-review

Researchers

  • Chao Gu
  • Junhe Lian

  • Yanping Bao
  • Sebastian Münstermann

Research units

  • University of Science and Technology Beijing
  • RWTH Aachen University
  • Massachusetts Institute of Technology

Abstract

A multiscale numerical method to study the high cycle fatigue (HCF) and very high cycle fatigue (VHCF) properties of bearing steels is proposed in this study. The method is based on the microstructur sensitive modeling approach resulting from the integrated computational materials ensfgineming concept, and further consider the effect of residual stress generated from the prior heat treatment processes. The microstructure features, including the grain size and shape distribution and inclusion size and shape description, are represented by the representative volume element (RVE) models. The matrix mechanical response to the cyclic loading is described by the crystal plasticity (CP) model. The CP material parameter set is calibrated inversely based on the strain controlled low cycle fatigue tests. The results show that the residual stresses, especially those around the inclusion, have a great effect on the fatigue properties, which provides the key factor to give the correct prediction of the fatigue crack initiation site. (C) 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers.

Details

Original languageEnglish
Pages (from-to)2048-2052
Number of pages5
JournalProcedia Structural Integrity
Volume13
Publication statusPublished - 2018
MoE publication typeA4 Article in a conference publication
EventEuropean Conference on Fracture - Belgrade, Serbia
Duration: 26 Aug 201831 Aug 2018
Conference number: 22

    Research areas

  • fatigue life, modeling, residual stress, microstructure, CRACK INITIATION, INCLUSIONS, STEELS

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