Abstract
This paper is focused on double-sided self-pierce riveting (DSSPR) of overlapped sheets made from dissimilar materials with very different mechanical strengths. The methodology draws from previous work on sheets made from similar or identical materials and the extension to dissimilar materials is built-upon a combined experimental and numerical investigation that makes use of AA5754-H111 aluminum and polyvinylchloride sheets. Results show that reengineering of conventional DSSPR by modification of the chamfered rivet angles to account for the different resistances to penetration of the two materials is not effective, because it cannot solve the formation of asymmetric mechanical interlockings with very small undercuts in the harder sheet material. The proposal of an innovative two-stroke DSSPR process in which the tubular rivet is first forced through the harder sheet with the help of a dedicated compression tool, and only subsequently pressed through the softer sheet, proves to be effective in obtaining symmetric joints with good undercuts in both sheets. Destructive shear tests confirm the good performance of the joints produced by means of the new proposed two-stroke DSSPR.
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Acknowledgments
The authors would like to thank the support provided by Fundação para a Ciência e a Tecnologia of Portugal and IDMEC under LAETA-UIDB/50022/2020.
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This work was supported by Fundação para a Ciência e a Tecnologia of Portugal and IDMEC under LAETA-UIDB/50022/2020.
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Experimentation, Luis M. Alves, Rafael M. Afonso, Patric T. Pereira; numerical modeling, Luis M. Alves, Rafael M. Afonso, Patric T. Pereira, Paulo A.F. Martins; writing-original draft preparation, Paulo A.F. Martins; writing-review and editing, Luis M. Alves, Rafael M. Afonso, Paulo A.F. Martins; coordination, Paulo A.F. Martins.
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Alves, L.M., Afonso, R.M., Pereira, P.T. et al. Double-sided self-pierce riveting of dissimilar materials. Int J Adv Manuf Technol 115, 3679–3687 (2021). https://doi.org/10.1007/s00170-021-07426-3
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DOI: https://doi.org/10.1007/s00170-021-07426-3