Incorporating Finite Element Analysis into Component Life and Reliability

[+] Author and Article Information
R. August

Sverdrup Technology, Inc., Lewis Research Center Group, Brook Park, OH 44142

E. V. Zaretsky

National Aeronautics and Space Administration, Lewis Research Center, Cleveland, OH 44135

J. Mech. Des 115(4), 706-710 (Dec 01, 1993) (5 pages) doi:10.1115/1.2919258 History: Received March 01, 1992; Online June 02, 2008


A method for estimating a component’s design survivability by incorporating finite element analysis and probabilistic material properties was developed. The method evaluates design parameters through direct comparisons of component survivability expressed in terms of Weibull parameters. The analysis was applied to a rotating disk with mounting bolt holes. The highest probability of failure occurred at, or near, the maximum shear stress region of the bolt holes. Distribution of material failure as a function of Weibull slope affects the probability of survival. Where Weibull parameters are unknown for a rotating disk, it may be permissible to assume Weibull parameters, as well as the stress-life exponent, in order to determine the qualitative effect of disk speed on the probability of survival.

Copyright © 1993 by The American Society of Mechanical Engineers
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