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Self-pierce riveting through 3 sheet metal combinations
RISE, Swerea, Swerea KIMAB AB.
2011 (engelsk)Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

One way to reduce the CO2 emissions in automotives is to reduce the weight of the Body-In-White. One easy to achieve the weight reduction is to replace steel sheet materials with Al alloys, which is 3 times lighter. One issue is the joining process, especially with combinations between steel grades and AL alloys. Example of combination of mixed material combinations (Al-steel) might be found in the door structure. The reason is because of the AL alloys worthier crash performance so the automotive manufacturer might want to use crash impact beams made by high strength steels in a AL intensive door structure. The joining process between aluminum and steel are problematic due it's not possible to use traditional spot-welding technologies due to the materials total difference in microstructure characteristics as well thermal properties. To overcome this issue then mechanical as well adhesion joining are frequently used. This paper describes a development process and subsequently analysis of a self-pierce rivet (SPR) process between 3 sheet metal combinations. The multi-material combinations in this study were a combination of ultra high strength steels sheets (DP1000) and a Al-alloy (AA 6014). The analysis of the SPR process, in sense of mechanical strengths, has been done by peel-and shear tests. To reduce the amount of future physical tests a virtual FE-model has been developed for the process. This FE model of the process has been subsequently used to analyze the mechanical strength during plastic deformation. By using inverse analysis a correct contact algorithm has been evaluated that would predict the binding force between the rivet and sheet under a deformation process. With this new virtual model it will not only possible to analyze and develop the SPR process but also to achieve the final strength of the joint. © 2011 American Institute of Physics.

sted, utgiver, år, opplag, sider
2011. Vol. 1353, s. 1296-1299
Serie
AIP Conference Proceedings, ISSN 0094-243X
Emneord [en]
joining processes, Mixed sheet materials, SPR, virtual manufacturing
HSV kategori
Identifikatorer
URN: urn:nbn:se:ri:diva-12950DOI: 10.1063/1.3589695OAI: oai:DiVA.org:ri-12950DiVA, id: diva2:973143
Tilgjengelig fra: 2016-09-22 Laget: 2016-09-22bibliografisk kontrollert

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