Experimental Plan for the Development of Equivalent Crack Size Distributions and a Monte Carlo Model of Fatigue in Low and High-kt Specimens of Corroded AA7050-T7451
Abstract
Fatigue life data from low and high-kt specimen are difficult to compare due to the smaller sampling volume of high-kt specimens. As a result, equivalent crack size (ECS) distributions developed using low-kt specimens cannot be used in high-kt conditions such as near fastener holes. This experimental plan addresses this issue for corroded AA7050-T7451. Fatigue crack growth (FCG) and fatigue life tests will be conducted on low and high-kt specimens which have been designed to minimise the differences between the specimens other than the different stress field. FCG data and ECS distributions will be developed for both specimens types. A Monte Carlo model will then be used to test if the low-kt ECS distribution can accurately predict the fatigue lives of the high-kt specimens. If successful, this will allow low-kt ECS distributions, which are easier to derive, to be used under high-kt conditions.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 2012
- Accession Number
- ADA563803
Entities
People
- Bruce R. Crawford
- Chris Loader
- P. K. Sharp
- Timothy J. Harrison
Organizations
- Defence Science and Technology Group