多轴载荷下搅拌摩擦点焊接头的失效预测:一种失效经验模型
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摘要
搅拌摩擦点焊(FSSW)作为一种固相焊接技术,是适用于汽车铝质车身关键构件连接的新型工艺,且接头在服役期间处于显著的多轴应力状态。本工作采用5052H32和6061T6两种汽车铝合金制备了多种连接工况下的常规FSSW焊接接头,通过多轴加载实验获取其在多角度准静态拉伸下的失效强度,进而提出了多轴载荷下依赖于合矢力的宏观破坏准则,并给出了基于幂函数形式的临界载荷力经验判据模型,所拟合的失效包络线和实测数据吻合良好,最大预测误差为11.8%;进一步讨论了不同车用连接工况对FSSW接头静态失效特性的影响。此经验模型可为工程应用提供可靠的预测,有益于该类接头的强度安全评价和有限连接单元建模。
As a solid phase welding technology, friction stir spot welding(FSSW) is a new process which is suitable for the joining of key components of automotive aluminum body, and the joints are in a state of significant multi-axial stress during service. In this paper, conventional FSSW welded joints were fabricated with 5052 H32 and 6061 T6 of automotive aluminum alloys under various joining conditions. The failure strength of multi-angle quasi-static tension was obtained by multi-axis loading tests. Thus, the macroscopic failure criterion which depended on resultant force under multi-axial load was proposed. Then the empirical criterion model of critical load was given using the power function form. The failure envelopes fitted well with the measured data, and the maximum prediction error was 11.8%. Moreover, the effect of different automotive joining conditions on static failure envelopes of FSSW joints was discussed. This empirical model provides reliable predictions for engineering applications, contributing to the strength safety evaluation and the modeling of this finite joint element.
As a solid phase welding technology, friction stir spot welding(FSSW) is a new process which is suitable for the joining of key components of automotive aluminum body, and the joints are in a state of significant multi-axial stress during service. In this paper, conventional FSSW welded joints were fabricated with 5052 H32 and 6061 T6 of automotive aluminum alloys under various joining conditions. The failure strength of multi-angle quasi-static tension was obtained by multi-axis loading tests. Thus, the macroscopic failure criterion which depended on resultant force under multi-axial load was proposed. Then the empirical criterion model of critical load was given using the power function form. The failure envelopes fitted well with the measured data, and the maximum prediction error was 11.8%. Moreover, the effect of different automotive joining conditions on static failure envelopes of FSSW joints was discussed. This empirical model provides reliable predictions for engineering applications, contributing to the strength safety evaluation and the modeling of this finite joint element.
引文
1 Wu S N.Study on microstructure,properties and welding process simulation for aluminum alloy resistance spot weld.Ph.D.Thesis,Chongqing University,China,2017(in Chinese).吴赛楠.铝合金电阻点焊组织性能与焊接过程数值模拟研究.博士学位论文,重庆大学,2017.
2 Zhang J L.Study on the parameters,microstructure and properties of 5052 friction stir spot welded joints.Master’s Thesis,Tianjin University,China,2009(in Chinese).张家龙.5052铝合金搅拌摩擦点焊工艺及组织性能研究.硕士学位论文,天津大学,2009.
3 Qian X D,He X P,Jiao C H,et al.Journal of Hehai University (Natural Sciences),2015,43(2),121(in Chinese).钱向东,何晓萍,焦彩虹,等.河海大学学报(自然科学版),2015,43(2),121.
4 Lin C,Wang W W,Chen X K.Structure and design of automotive body,China Machine Press,China,2016(in Chinese).林程,王文伟,陈潇凯.汽车车身结构与设计,机械工业出版社,2016.
5 Hao S F.Study on failure behavior of hot stamping high strength steel spot welds.Master’s Thesis,Beijing University of Technology,China,2013(in Chinese).郝素锋.热冲压高强钢点焊接头失效行为研究.硕士学位论文,北京工业大学,2013.
6 Plaine A H,Suhuddin U F H,Alcantara N G,et al.International Journal of Fatigue,2016,91(1),149.
7 Mahmood T R,Doos Q M,Al-Mukhtar A M.Procedia Structural Integrity,2018,9,71.
8 Satonaka S,Kaieda K,Okamoto S.Welding in the World,2013,48(5-6),39.
9 Marya M,Wang K,Hector L G,et al.Journal of Manufacturing Science and Engineering,2006,128,287.
10 Cheng C S.SAE Transactions,2004,113(5),919.
11 Li X Y,Hao Q.International Journal of Pressure Vessels and Piping,2003,80(9),647.
12 Shen Z,Yang X,Zhang Z,et al.Materials and Design,2013,44,476.
13 Jeon C S,Hong S T,Kwon Y J,et al.Transactions of Nonferrous Metals Society of China,2012,22,s605.
14 Zhu X G,Wang L F,Qiao F B,et al.Transactions of the China Welding Institution,2014,35(4),91(in Chinese).朱小刚,王联凤,乔凤斌,等.焊接学报,2014,35(4),91.
15 Hibbeler R C.Engineering mechanics (statics and material mechanics),China Machine Press,China,2014(in Chinese).R.C.希伯勒.工程力学(静力学与材料力学),机械工业出版社,2014.
16 Zhu W Q.Research on optimization of welding parameters based on loads of spot welds.Master’s Thesis,Hunan University,China,2016(in Chinese).朱伟强.基于车身焊点载荷的焊接参数优化研究.硕士学位论文,湖南大学,2016.
2 Zhang J L.Study on the parameters,microstructure and properties of 5052 friction stir spot welded joints.Master’s Thesis,Tianjin University,China,2009(in Chinese).张家龙.5052铝合金搅拌摩擦点焊工艺及组织性能研究.硕士学位论文,天津大学,2009.
3 Qian X D,He X P,Jiao C H,et al.Journal of Hehai University (Natural Sciences),2015,43(2),121(in Chinese).钱向东,何晓萍,焦彩虹,等.河海大学学报(自然科学版),2015,43(2),121.
4 Lin C,Wang W W,Chen X K.Structure and design of automotive body,China Machine Press,China,2016(in Chinese).林程,王文伟,陈潇凯.汽车车身结构与设计,机械工业出版社,2016.
5 Hao S F.Study on failure behavior of hot stamping high strength steel spot welds.Master’s Thesis,Beijing University of Technology,China,2013(in Chinese).郝素锋.热冲压高强钢点焊接头失效行为研究.硕士学位论文,北京工业大学,2013.
6 Plaine A H,Suhuddin U F H,Alcantara N G,et al.International Journal of Fatigue,2016,91(1),149.
7 Mahmood T R,Doos Q M,Al-Mukhtar A M.Procedia Structural Integrity,2018,9,71.
8 Satonaka S,Kaieda K,Okamoto S.Welding in the World,2013,48(5-6),39.
9 Marya M,Wang K,Hector L G,et al.Journal of Manufacturing Science and Engineering,2006,128,287.
10 Cheng C S.SAE Transactions,2004,113(5),919.
11 Li X Y,Hao Q.International Journal of Pressure Vessels and Piping,2003,80(9),647.
12 Shen Z,Yang X,Zhang Z,et al.Materials and Design,2013,44,476.
13 Jeon C S,Hong S T,Kwon Y J,et al.Transactions of Nonferrous Metals Society of China,2012,22,s605.
14 Zhu X G,Wang L F,Qiao F B,et al.Transactions of the China Welding Institution,2014,35(4),91(in Chinese).朱小刚,王联凤,乔凤斌,等.焊接学报,2014,35(4),91.
15 Hibbeler R C.Engineering mechanics (statics and material mechanics),China Machine Press,China,2014(in Chinese).R.C.希伯勒.工程力学(静力学与材料力学),机械工业出版社,2014.
16 Zhu W Q.Research on optimization of welding parameters based on loads of spot welds.Master’s Thesis,Hunan University,China,2016(in Chinese).朱伟强.基于车身焊点载荷的焊接参数优化研究.硕士学位论文,湖南大学,2016.
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