Coarsely Random Cracking in One-Crack Fatigue Models.

Abstract

The continuity equation has been applied to fatigue crack models in which all cracks begin together to form a family of smooth trajectories proceeding at different rates. When the rates at a particular crack length are log-Normally distributed, it is possible to estimate the effect of the mean and variance of crack life in a reliability situation. For a logarithmic variance 0.1 of crack rates, the standard deviation of life is reduced by 14% approximately. This crack model has been applied to a previous one-crack analysis to allow randomness in both initiation and cracking. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1980
Accession Number
ADA097194

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