Fatigue behavior and life prediction of self-piercing riveted joint

Published on Jul 1, 2016in International Journal of Fatigue4.369
· DOI :10.1016/J.IJFATIGUE.2016.03.015
Li Huang4
Estimated H-index: 4
(NUAA: Nanjing University of Aeronautics and Astronautics),
Li Huang4
Estimated H-index: 4
(NUAA: Nanjing University of Aeronautics and Astronautics)
+ 1 AuthorsXuming Su18
Estimated H-index: 18
(Ford Motor Company)
Sources
Abstract
Abstract The fatigue behavior of self-piercing riveted joints of aluminum alloy AA6111-T4 and steel HSLA340 sheets has been experimentally and numerically investigated in present paper. Fatigue results reveal that the mating sheet stiffness and load ratio have significant impact on the fatigue strength, and the dominant failure mode under tensile–shear loading is eyebrow crack with an approximately semi-elliptical crack front. New stress intensity factor equations are derived for a semi-elliptical surface crack in a finite plate near a rigid cylindrical inclusion with axial shear force and bending moment, including the ratio of crack depth to crack length ranged from 0.2 to 1 and the ratio of crack depth to sheet thickness ranged from 0.2 to 0.8. A new structural load fatigue crack growth model is proposed, and predictions of fatigue lives and final crack aspect ratios show good agreement with experimental results.
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