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10-11-2021 | Production Process

Double-sided self-pierce riveting with flat-bottom holes: a feasibility study

Journal:
Production Engineering
Authors:
Luis M. Alves, Rafael M. Afonso, Patric T. Pereira, Paulo A. F. Martins
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Abstract

This paper is focused on solving the problems of positioning and alignment of rivets in double-sided self-pierce riveting by means of flat-bottom holes that are previously machined in the overlapped sheets with greater mechanical strength. The work combines experimentation in joints made from dissimilar materials (aluminium AA5754-H111 and polyvinylchloride) with finite element modelling to investigate the influence of the flat-bottom hole geometry in the overall joining mechanisms. It is shown that the use of flat hole-bottom holes with rivets having identical chamfered angles in both ends is unable to create undercuts and to produce form-closed mechanical interlockings. Undercuts are created if different chamfered angles in the rivet ends are introduced to compensate the greater or lesser difficulty of the rivets to pierce through sheets with different mechanical strengths. Destructive shear and peel tests performed with different types of joints confirm the good performance of the joints produced by double-sided self-pierce riveting with flat-bottom holes.

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