Sarris J, Lechner M (2026)
Publication Type: Journal article
Publication year: 2026
Original Authors: Jessica Sarris, Michael Lechner
Book Volume: 1185
Pages Range: 19-28
DOI: 10.4028/p-aok1H1
Conventional self-piercing riveting (SPR) produces rotationally symmetric joints with largely uniform mechanical behavior. While this provides robust performance in many applications, increasing demands for material-efficient lightweight design, complex load paths and hybrid material systems require more versatile joining strategies. Recent experiments have demonstrated that an adapted tumbling SPR (T-SPR) process can intentionally induce non-rotationally symmetric joint geometries and thereby extend process limits beyond those of conventional SPR. Such asymmetric joints offer the potential to tailor load-bearing capacity and energy absorption to specific load directions, which could be particularly advantageous in crash-relevant or multi-material applications. Building on these findings, the present study shifts the focus from geometry control to the systematic evaluation of the mechanical performance of asymmetric T-SPR joints. Specimens were produced using T-SPR with tailored combinations of tumbling angle and velocity. The joints are manufactured with a versatile tumbling self-piercing riveting tool. To assess the resulting mechanical properties, cross tensile and tensile shear tests are conducted. From the resulting force-displacement curves, typical mechanical properties such as ultimate load, load-bearing capacity, displacement at failure and absorbed energy are derived. The mechanical performance of asymmetric joints is evaluated in comparison with symmetric reference joints produced by tumbling self-piercing riveting. This enables both the demonstration of direction-dependent mechanical behavior of asymmetric joints compared to symmetric references and a systematic evaluation of how geometric anisotropy affects load-bearing capacity, absorbed energy and failure characteristics.
APA:
Sarris, J., & Lechner, M. (2026). Influence of Tumbling-Induced Geometric Anisotropy on the Mechanical Performance of Self-Piercing Rivet Joints. Materials Science Forum, 1185, 19-28. https://doi.org/10.4028/p-aok1H1
MLA:
Sarris, Jessica, and Michael Lechner. "Influence of Tumbling-Induced Geometric Anisotropy on the Mechanical Performance of Self-Piercing Rivet Joints." Materials Science Forum 1185 (2026): 19-28.
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