Title: Fatigue strength estimation of single self-piercing riveted joints of steel and aluminium plates under different loading modes

Authors: Young-In Lee; Ho-Kyung Kim

Addresses: Graduate School, Seoul National University of Science and Technology, Seoul, 01811, South Korea ' Department of Mechanical and Automotive Engineering, Seoul National University of Science and Technology, Seoul, 01811, South Korea Fax: 02-979-7032

Abstract: Self-piercing riveting (SPR) has recently been adopted to join automotive body components because this method can reduce manufacturing costs via product automation while also providing a simpler process. In this study, fatigue tests were conducted using cross-tension and coach-peel specimens with aluminium alloy (A5052) and cold-rolled steel (SPCC) plates to evaluate the fatigue strength of SPR joints. For the combination of a top steel plate and a bottom aluminium alloy plate, designated here as T.S-B.A, the applied load amplitudes corresponding to the fatigue limit in the cross-tension and the coach-peel specimens are approximately 13% and 15% of the monotonic strength, respectively. The fatigue strength of SPR joints of aluminium and steel plates under various types loading conditions can be adequately predicted by the equivalent stress intensity factor amplitude.

Keywords: fatigue lifetime; SPR joints; coach-peel; cross-tension; equivalent stress intensity factor; fatigue parameter; failure modes; FEM analysis; fatigue strength.

DOI: 10.1504/IJMPT.2022.126446

International Journal of Materials and Product Technology, 2022 Vol.65 No.4, pp.333 - 357

Accepted: 24 Nov 2021
Published online: 26 Oct 2022 *

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