Abstract
Residual stress in self-piercing riveting (SPR) joints: industrial application
13th Annual AINSE-ANBUG Neutron Scattering Symposium (AANSS) Abstract Handbook, p.17
Annual AINSE-ANBUG Neutron Scattering Symposium (AANSS), 13th (Sydney, Australia, 29-Nov-2016–30-Nov-2016)
2016
Abstract
Self-Piercing Riveting (SPR) is a high-speed mechanical fastening technique used to join sheet materials which does not require pre-drilling. This technique is increasingly adopted by the automotive industry because of the growing use of light weight or dissimilar metals (galvanized steel, aluminium and magnesium alloys) that are difficult to spot weld. During SPR, a mechanical interlock is created by the rivet through piercing the top sheet and flaring in the bottom sheet under the guidance of the rivet internal geometry and a die. However, the rivet material should have enough hardness to pierce the sheets, and necessary ductility to deform plastically in the bottom sheet without cracking. As now-a-days more and more high strength lightweight alloy materials are introduced, the ability of a rivet to pierce and deform in a ductile manner becomes more limited. Also, residual stress is developed inside the joint due to the plastic deformation. During service, this residual stress may lead to premature failure of the joint. Hence, it is important to know the residual stress distribution arising from the riveting process. Residual stress distribution in SPR joints of high strength materials was investigated by neutron strain scanner KOWARI at ANSTO. It is evident that neutron diffraction technique can successfully predict the position of the rivet legs after flaring inside the joint without having to cross-section. Moreover, this technique can also help to predict any cracks in top and bottom sheets. The study also shows that neutron diffraction technique enabled a crack in the rivet tip to be detected which was not apparent from a cross-section. This information can provide guidance for the optimum design of SPR joining conditions in industrial application, especially for high strength low ductility materials also can be used to push the operating window of the process.
Details
- Title
- Residual stress in self-piercing riveting (SPR) joints: industrial application
- Authors
- Rezwanul Haque (Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and Engineering
- Publication details
- 13th Annual AINSE-ANBUG Neutron Scattering Symposium (AANSS) Abstract Handbook, p.17
- Conference details
- Annual AINSE-ANBUG Neutron Scattering Symposium (AANSS), 13th (Sydney, Australia, 29-Nov-2016–30-Nov-2016)
- Date published
- 2016
- Organisation Unit
- School of Science and Engineering - Legacy; University of the Sunshine Coast, Queensland; School of Science, Technology and Engineering
- Language
- English
- Record Identifier
- 99451494002621
- Output Type
- Abstract
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