Transition of Corner Cracks at Holes into Through-The-Thickness Cracks
Abstract
This study developed correction factors for currently used stress intensity factor equations to more accurately predict stress intensity factors for a corner crack emanating from a hole as it transitions to a uniform through- the-thickness crack. These correction factors resulted in an approximate 15 percent increase in total life prediction and a far better correlation between analytical stress intensity factor predictions and experimental results in the transition region. The material used for total life predictions was 7075-T651 Aluminum, and the initial crack eccentricity, a/c, was always greater than one.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1983
- Accession Number
- ADA136922
Entities
People
- Stephen W. Opel
Organizations
- Air Force Institute of Technology