Transition of Corner Cracks at Holes into Through-The-Thickness Cracks
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING
Pagination or Media Count:
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, ac, was always greater than one.
- Metallurgy and Metallography