Contact elasto-plasticity of inhomogeneous materials and a numerical method for estimating matrix yield strength of composites

Mengqi Zhang, Zhao Ning*, Qian Wang, Nagaraj Arakere, Qinghua Zhou, Zhanjiang Wang, Xiaoqing Jin, Leon M. Keer

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

For inhomogeneous materials such as case carburized steels, the localized micro-plasticity is induced at the scale of the inhomogeneity even if the stress field is elastic at the global scale. The matrix yield strength is a critical measure of integrity of such materials but is largely unknown and difficult to be directly measured due to the disturbances from distributed inhomogeneities. A numerical method is proposed to estimate the matrix yield strength of an inhomogeneous material. This allows for extracting matrix yield strength of the carburized bearing steel M50-NiL. The results show that, the difference between the macroscopic yield strength and matrix yield strength is small, suggesting that the direct strengthening from carbides as particle reinforcement is limited.

Original languageEnglish (US)
Pages (from-to)84-95
Number of pages12
JournalTribology International
Volume127
DOIs
StatePublished - Nov 2018

Keywords

  • Case carburized bearing steel
  • Elastoplastic contact
  • Inhomogeneous material
  • Numerical equivalent inclusion method

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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