Date of Award
Mechanical, Automotive, and Materials Engineering
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In predicting the fatigue lives of structural or mechanical components, there are several multiaxial fatigue theories that can be used to evaluate the fatigue crack initiation. However, there exists a lack of agreements on which theory models the fatigue crack initiation most appropriately. The purpose of this thesis is to evaluate the validity of most commonly used multiaxial fatigue criteria; specifically the maximum principal strain and the maximum shear strain criteria. Moreover, a new criterion based on strain energy density is proposed and evaluated for elastic and elastic-plastic damage scenarios. The best criterion, identified through comparative analyses, is used to evaluate the fatigue lives of two connecting rods supplied by an automotive company. Three-dimensional finite element analysis is performed on the SAE notch shaft, which is used as a test component to evaluate the validity of the existing and proposed multiaxial fatigue damage criteria. Elastic and elastic-plastic stress-strain responses are then used to obtain the required damage parameters that are eventually used to predict the fatigue lives. (Abstract shortened by UMI.)Dept. of Mechanical, Automotive, and Materials Engineering. Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis2000 .E45. Source: Masters Abstracts International, Volume: 40-03, page: 0771. Adviser: Sudip Bhattacharjee. Thesis (M.A.Sc.)--University of Windsor (Canada), 2001.
El-Hage, Hicham., "Multiaxial fatigue analyses and life predictions using finite element method." (2001). Electronic Theses and Dissertations. 2797.