Journal of Zhejiang University SCIENCE A

, Volume 7, Issue 3, pp 391-397

First online:

Reliability analysis of diesel engine crankshaft based on 2D stress strength interference model

  • Zhou Xun 周迅Affiliated withSchool of Mechanical and Energy Engineering, Zhejiang University
  • , Yu Xiao-li 俞小莉Affiliated withSchool of Mechanical and Energy Engineering, Zhejiang University

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A 2D stress strength interference model (2D-SSIM) considering that the fatigue reliability of engineering structural components has close relationship to load asymmetric ratio and its variability to some extent is put forward. The principle, geometric schematic and limit state equation of this model are presented. Reliability evaluation for a kind of diesel engine crankshaft was made based on this theory, in which multi-axial loading fatigue criteria was employed. Because more important factors, i.e. stress asymmetric ratio and its variability, are considered, it theoretically can make more accurate evaluation for structural component reliability than the traditional interference model. Correspondingly, a Monte-Carlo Method simulation solution is also given. The computation suggests that this model can yield satisfactory reliability evaluation.

Key words

Fatigue reliability 2-dimensional interference model (2D-SSIM) Monte-Carlo Method Load asymmetric ratio Multi-axial fatigue criteria