Journal of Failure Analysis and Prevention

, Volume 10, Issue 6, pp 531–539 | Cite as

Following Spur Gear Crack Propagation in the Tooth Foot by Finite Element Method

  • S. ZouariEmail author
  • M. Maatar
  • T. Fakhfakh
  • M. Haddar
Technical Article---Peer-Reviewed


The objective of this study was to follow the crack propagation in the tooth foot of a spur gear by using Linear Elastic Fracture Mechanics (LEFM) and the Finite Element Method (FEM). The tooth foot crack propagation is a function of Stress Intensity Factors (SIF) that play a very crucial role in the life span of the gear. A two-dimensional quasi-static analysis is carried out using a program that determines the gear geometry, coupled with the Finite Element Code (ANSYS). The study estimates the stress intensity factors and monitors their variations on the tooth foot according to crack depth, crack propagation angle, and the crack position. An appropriate methodology for predicting the crack propagation path is applied by considering gear tooth behavior in bending fatigue. The results are used to predict/prevent catastrophic rim fracture failure modes from occurring in critical components.


Spur gear Foot crack Crack propagation path Stress intensity factor Finite element method 


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Copyright information

© ASM International 2010

Authors and Affiliations

  1. 1.Dynamic of the Mechanical Systems Research Unit, Mechanical Design Department, School of Engineering (ENIS)Sfax UniversitySfaxTunisia

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