铝钢电阻单元焊接头力学性能模拟
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摘要
电阻单元焊接头综合了熔化焊和机械连接的效果,其力学性能由2种连接方式共同决定,而三维有限元模型是研究铝钢电阻单元焊接头力学性能的有效手段.通过金相试验接头宏观形貌,结合硬度实验和经验公式确定接头各区域材料的力学性能,以此作为模型输入.通过该模型,对试验过程中接头断面的几何形貌演化规律以及应力分布特征进行了分析,并结合试验结果研究了接头的失效模式,为揭示接头失效机理提供了借鉴.
The mechanical properties of resistance element welding(REW) joints are decided by both effects of fusion welding and mechanical joining. The mechanical properties of REW for aluminum alloy to steel could be effectively studied by three-dimensional finite-element(FE) models. The modeling input consists of cross-section profile of joint observed by metallography, and stress-strain parameters of regional materials obtained by hardness test and empirical formula. Based on this new modeling method, the geometrical evolution and stress distribution during the mechanical testing of REW joints are studied systematically. Via comparing with parallel experimental results, the failure mode of REW joints is analyzed, which provides useful reference to understand the failure mechanism of REW joints.
The mechanical properties of resistance element welding(REW) joints are decided by both effects of fusion welding and mechanical joining. The mechanical properties of REW for aluminum alloy to steel could be effectively studied by three-dimensional finite-element(FE) models. The modeling input consists of cross-section profile of joint observed by metallography, and stress-strain parameters of regional materials obtained by hardness test and empirical formula. Based on this new modeling method, the geometrical evolution and stress distribution during the mechanical testing of REW joints are studied systematically. Via comparing with parallel experimental results, the failure mode of REW joints is analyzed, which provides useful reference to understand the failure mechanism of REW joints.
引文
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[17] 刘红,贾平平.提高管材弯曲仿真效率的方法[J].计算机仿真,2015,32(10):234-238.LIU Hong,JIA Pingping.Method of rising simulation efficiency for tube bends[J].Computer Simulation,2015,32(10):234-238.
[2] CHEN N N,WANG H P,CARLSON B E,et al.Fracture mechanisms of Al/steel resistance spot welds in lap shear test[J].Journal of Materials Processing Technology,2017,243:347-354.
[3] 龙江启,兰凤崇,陈吉清.车身轻量化与钢铝一体化结构新技术的研究进展[J].机械工程学报,2008,44(6):27-35.LONG Jiangqi,LAN Fengchong,CHEN Jiqing.New technology of lightweight and steel-aluminum hybrid structure car body[J].Chinese Journal of Mechanical Engineering,2008,44(6):27-35.
[4] HAMIDINEJAD S M,KOLAHAN F,KOKABI A H.The modeling and process analysis of resistance spot welding on galvanized steel sheets used in car body manufacturing[J].Materials & Design,2012,34:759-767.
[5] 邱然锋,石红信,张柯柯,等.汽车车身用铝合金与钢的异种材料电阻点焊技术研究现状[J].电焊机,2010,40(5):150-154.QIU Ranfeng,SHI Hongxin,ZHANG Keke,et al.Research status of resistance spot welding between steel and aluminumalloy for automobile body[J].Electric Welding Machine,2010,40(5):150-154.
[6] 金鑫,李永兵,楼铭,等.基于正交试验的铝合金——高强钢异种金属自冲铆接工艺优化[J].汽车工程学报,2011,1(3):185-191.JIN Xin,LI Yongbing,LOU Ming,et al.Process optimization of self-piercing riveting aluminum to high strength steel using DOE method[J].Chinese Journal of Automotive Engineering,2011,1(3):185-191.
[7] ABE Y,KATO T,MORI K.Self-piercing riveting of high tensile strength steel and aluminium alloy sheets using conventional rivet and die[J].Journal of Materials Processing Technology,2009,209(8):3914-3922.
[8] MESCHUT G,HAHN O,JANZEN V,et al.Innovative joining technologies for multi-material structures[J].Welding in the World,2014,58(1):65-75.
[9] MESCHUT G,JANZEN V,OLFERMANN T.Innovative and highly productive joining technologies for multi-material lightweight car body structures[J].Journal of Materials Engineering and Performance,2014,23(5):1515-1523.
[10] 凌展翔,罗震,冯悦峤,等.硼钢与铝合金的新型电阻单元焊技术[J].焊接学报,2016,37(7):109-113.LING Zhanxiang,LUO Zhen,FENG Yueqiao,et al.Novel resistance element welding of Al alloy to boron steel[J].Transactions of the China Welding Institution,2016,37(7):109-113.
[11] LING Z,LI Y,LUO Z,et al.Resistance element welding of 6061 aluminum alloy to uncoated 22MnMoB boron steel[J].Materials and Manufacturing Processes,2016,31(16):2174-2180.
[12] 宇慧平,王伟伟,李晓阳,等.超高强钢点焊结构拉剪试验及数值仿真[J].焊接学报,2013,34(10):9-12.YU Huiping,WANG Weiwei,LI Xiaoyang,et al.Experiments and numerical simulation on spot-welded structureof ultra-high strength steel[J].Transactions of the China Welding Institution,2013,34(10):9-12.
[13] ZENG L,XIA Y,ZHAO H,et al.On utilization of material failure criterion in modeling pull-out failure of spot-welded joints[C]//ASME 2013 International Mechanical Engineering Congress and Exposition.San Diego:American Society of Mechanical Engineers,2013:V009T10A094-V009T10A094.
[14] TAYLOR M D,CHOI K S,SUN X,et al.Correlations between nanoindentation hardness and macroscopic mechanical properties in DP980 steels[J].Materials Science & Engineering:A,2014,597:431-439.
[15] ZHU H,ZHU Q,KOSASIH B,et al.Investigation on mechanical properties of high speed steel roll material by nanoindentation[J].Materials Research Innovations,2013,17(Sup 2):35-39.
[16] 曾龙.高强钢点焊接头失效行为及仿真模型研究[D].北京:清华大学,2013.ZENG Long.Study on the modeling and failure behaviors of high strength steel spot-welding joints[D].Beijing:Tsinghua University,2013.
[17] 刘红,贾平平.提高管材弯曲仿真效率的方法[J].计算机仿真,2015,32(10):234-238.LIU Hong,JIA Pingping.Method of rising simulation efficiency for tube bends[J].Computer Simulation,2015,32(10):234-238.