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http://dx.doi.org/10.5139/JKSAS.2003.31.1.008

A Study on Damage Tolerance Assessment for the Butt Lap Joint Structure with the Effects of Fretting Fatigue Cracks  

Kwon, Jung-Ho (울산대학교 수송시스템공학부)
Hwang, Kyung-Jung (울산대학교 항공우주공학과 대학원)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.31, no.1, 2003 , pp. 8-17 More about this Journal
Abstract
The butt lap joint structures which are usually designed by the concept of slow crack growth damage tolerance, show frequently the behaviors of multiple site fatigue crack growth around the fastener hole edges due to the fretting between the two jointed parts. In this paper, experimental tests of fatigue crack growth have been performed of a bolted butt lap joint structure having an initial corner crack at the fastener hole edge, with different fretting conditions under a flight load spectrum. The obtained test results were reviewed to investigate the effects of fretting fatigue cracks on the damage tolerance crack growth life. Computations of corner crack growth were also carried out using an existed model to compare with test results.
Keywords
Fretting Fatigue; Corner Crack Growth; Microfractography; Damage Tolerance; Butt Lap Joint; Aricraft Structure;
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