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http://dx.doi.org/10.3795/KSME-A.2011.35.10.1229

Comparison and Estimation of Fretting Fatigue Damage Parameters for Aluminum Alloy A7075-T6  

Hwang, Dong-Hyeon (Dept. of Mechanical Engineering, Hongik Univ.)
Cho, Sung-San (Dept. of Mechanical Engineering, Hongik Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.35, no.10, 2011 , pp. 1229-1235 More about this Journal
Abstract
Fatigue tests were conducted on the aluminum alloy, A7075-T6 to determine the most reliable fretting fatigue damage parameter. Specimens with grooves were used, so that either fretting fatigue crack at the pad/specimen interface or plain fatigue crack at the groove could be nucleated, depending on the pad pressure. Both the crack nucleation location and initial crack orientation were examined using optical microscopy, and the results were used to assess the reliability of the various fretting fatigue damage parameters that have been most commonly used in the literature. Finite element analysis was employed to obtain the stress and strain data of the specimen, which were needed to estimate the parameter values and the orientation of the critical plane. It was revealed that both the Fatemi.Socie and McDiarmid parameters, which assume shear-mode fatigue cracking, are the most reliable.
Keywords
Fretting fatigue; Damage parameter; Finite Element Analysis; Crack initiation;
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