A study of structural stress technique for fracture prediction of an auto-mobile clutch snap-ring

Ju Hee Kim, Man Sik Myeong, Chang Sik Oh, Yun-Jae Kim

Research output: Contribution to journalArticle

Abstract

The endurance reliability assessment of a highly complex mechanism is generally predicted by the fatigue life based on simple stress analysis. This study discusses various fatigue life assessment techniques for an automobile clutch snap ring. Finite element analyses were conducted to determine the structural stress on the snap ring. Structural stress that is insensitive in regards to the mesh size and type definition is presented in this study. The structural stress definition is consistent with elementary structural mechanics theory and provides an effective measure of a stress state that pertains to fatigue behavior of welded joints in the form of both membrane and bending components. Numerical procedures for both solid models and shell or plate element models are presented to demonstrate the mesh-size insensitivity when extracting the structural stress parameters. Conventional finite element models can be used with the structural stress calculations as a post-processing procedure. The two major implications from this research were: (a) structural stresses pertaining to fatigue behavior can be consistently calculated in a mesh-insensitive manner regardless of the types of finite element models; and (b) by comparing with the clutch snap-ring fatigue test data, we should predict the fatigue fractures of an automobile clutch snap ring using this method.

Original languageEnglish
Pages (from-to)175-183
Number of pages9
JournalTransactions of the Korean Society of Mechanical Engineers, A
Volume40
Issue number2
DOIs
Publication statusPublished - 2016 Feb 1

Keywords

  • Clutch snap-ring
  • FE analysis
  • Structural stress

ASJC Scopus subject areas

  • Mechanical Engineering

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