Influence of die geometry on self-piercing riveting of aluminum alloy AA6061-T6 to mild steel SPFC340 sheets
Tóm tắt
The self-piercing riveting (SPR) process was used to join 2.0-mm-thick aluminum alloy 6061-T6 and 1.2-mm-thick mild steel SPFC340 sheets. SPR joints produced with a conventional flat-bottom die and conical-section dies were investigated both experimentally and numerically. Lap shear tests were conducted under quasi-static conditions to evaluate the load-carrying capability of these SPR joints. The effect of variation in die geometry (such as variation in the die groove shape, cone height, and die radius) on the main mechanical response of the joints, namely the peak load and energy absorption, was discussed. The results showed that SPR joints produced with the conical-section dies exhibited a failure mode similar to those produced with a conventional die. All the joints failed by tearing of the top steel sheet. Cracks that occurred in the bottom aluminum alloy 6061-T6 sheet around the rivet leg were a result of tangential tensile stress. The cone height of a conical-section die is the most important parameter affecting the surface quality of Al/steel SPR joints. Conical-section dies with a moderate convex can ensure a good surface quality during the SPR process. In addition, SPR joints with single conical-section die allow higher tensile strength and energy absorption compared to those with double conical-section die.
Tài liệu tham khảo
Hahn O, Dölle N, Rohde A (2001) An innovative concept for mixed-material construction in vehicle design: self-piercing riveting of aluminium and steel in combination. Atz Worldwide 103(2):15–18
Li D, Han L, Thornton M et al (2012) Influence of edge distance on quality and static behaviour of self-piercing riveted aluminium joints. Mater Des 34(34):22–31
Carle D, Blount G (1999) The suitability of aluminium as an alternative material for car bodies. Mater Des 20(5):267–272
Atzeni E, Ippolito R, Settineri L (2009) Experimental and numerical appraisal of self-piercing riveting. CIRP Ann Manuf Technol 58(1):17–20
Han L, Thornton M, Shergold M (2010) A comparison of the mechanical behaviour of self-piercing riveted and resistance spot welded aluminium sheets for the automotive industry. Mater Des 31(3):1457–1467
Li D, Chrysanthou A, Patel I et al (2017) Self-piercing riveting: a review. Int J Adv Manuf Technol 92:1777–1824
Bouchard PO, Laurent T, Tollier L (2008) Numerical modeling of self-pierce riveting—from riveting process modeling down to structural analysis. J Mater Process Technol 202(1–3):290–300
Mori K, Abe Y, Kato T (2014) Self-pierce riveting of multiple steel and aluminium alloy sheets. J Mater Process Technol 214(10):2002–2008
Hoang NH, Porcaro R, Langseth M et al (2010) Self-piercing riveting connections using aluminium rivets. Int J Solids Struct 47(3):427–439
Porcaro R, Hanssen AG, Langseth M et al (2006) Self-piercing riveting process: an experimental and numerical investigation. J Mater Process Technol 171(1):10–20
He X, Zhao L, Deng C et al (2015) Self-piercing riveting of similar and dissimilar metal sheets of aluminum alloy and copper alloy. Mater Des 65:923–933
Zhao L, He X, Xing B et al (2017) Fretting behavior of self-piercing riveted joints in titanium sheet materials. J Mater Process Technol 249:246–254
Haque R, Durandet Y (2017) Investigation of self-pierce riveting (SPR) process data and specific joining events. J Manuf Process 30:148–160
Ma YW, Lou M, Li YB et al (2017) Effect of rivet and die on self-piercing rivetability of AA6061-T6 and mild steel CR4 of different gauges. J Mater Process Technol 251:282–294
Abe Y, Kato T, Mori K (2009) Self-piercing riveting of high tensile strength steel and aluminium alloy sheets using conventional rivet and die. J Mater Process Technol 209(8):3914–3922
Franco GD, Fratini L, Pasta A et al (2010) On the self-piercing riveting of aluminium blanks and carbon fibre composite panels. Int J Mater Form 3(1):1035–1038
Franco GD, Fratini L, Pasta A (2012) Influence of the distance between rivets in self-piercing riveting bonded joints made of carbon fiber panels and AA2024 blanks. Mater Des 35:342–349
Mucha J (2011) A study of quality parameters and behaviour of self-piercing riveted aluminium sheets with different joining conditions. J Mech Eng 57(4):323–333