This study demonstrates the impact of fretting on fatigue and corrosive deterioration in riveted lap joints, suggesting implications for joint design.
This paper examines the contributions of fretting to the fatigue and corrosive deterioration of a riveted lap joint. The paper draws on previous analyses of a 2-dimensional model of a pinned connection and presents 3-dimensional finite element analyses of a riveted lap joint which evaluate the distortion of the joint and the local contact pressure and the in-plane and out-of-plane cyclic slip amplitude at the rivet-panel and panel-panel interfaces. Five rivet geometries and the effects of the coefficient of friction and interference are examined. A piezoelectric fretting wear machine is used to reproduce the relevant contact pressures and slip amplitudes and to measure fretting wear rates for uncoated and coated - 2024-T3 and 7075-T6 aluminum sheeting in contact with hardened steel and aluminum in relatively dry, laboratory air and in 3.5% saline solution. The effects of slip amplitudes in the range 25μm to 40μm on the specific wear rate, and coefficient of friction, are evaluated. In addition, results of tests of simple, riveted connections under severe fretting and anodic dissolution corrosion conditions are reported.
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Iyer et al. (1995) studied this question.
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