铝合金压印连接运行工况图与微动磨损
|
摘要
通过对AA5182压印连接,制备一批压印连接试件,一部分用于静拉伸试验,平均失效载荷值为1 449 N,失效形式均为颈部断裂。另一部分用于微动试验,施加最大载荷力为1 350 N,应力比R=0.1,试件失效形式均为上板断裂,断裂方向垂直于加载力方向,断裂位于接头边缘处。对微动试验的运行工况图分析,可得:微动初期F-D曲线呈椭圆形,张开型,有明显弹塑性变形,材料刚度增加较快;循环次数逐渐增多F-D曲线呈近似直线型,塑性变形减弱,弹性协调为主,材料刚度增加减缓。
A batch of clinch joint specimens of AA5182 alloy were prepared. Some parts were used for static tensile test,the average failure load value is 1 449 N,and the failure mode is neck fracture. The other parts were used for the fretting test,the maximum load is 1 350 N and the stress ratio is R=0.1. The failure mode of the specimens is the upper sheet fracture,the fracture direction is perpendicular to the loading force direction,and the fracture is located at the edge of the joints. By analyzing the working condition diagram obtained by the fretting test,it can be known that the initial F-D curves are elliptical,open-type,with obvious elastoplastic deformation and fast growing of material stiffness;the F-D curves are approximately beeline as the number of cycles increased gradually. At the same time,the plastic deformation is weakened,the elastic coordination is dominant,and increasement of the material stiffness become slowly.
A batch of clinch joint specimens of AA5182 alloy were prepared. Some parts were used for static tensile test,the average failure load value is 1 449 N,and the failure mode is neck fracture. The other parts were used for the fretting test,the maximum load is 1 350 N and the stress ratio is R=0.1. The failure mode of the specimens is the upper sheet fracture,the fracture direction is perpendicular to the loading force direction,and the fracture is located at the edge of the joints. By analyzing the working condition diagram obtained by the fretting test,it can be known that the initial F-D curves are elliptical,open-type,with obvious elastoplastic deformation and fast growing of material stiffness;the F-D curves are approximately beeline as the number of cycles increased gradually. At the same time,the plastic deformation is weakened,the elastic coordination is dominant,and increasement of the material stiffness become slowly.
引文
[1]HE Xiaocong. Influence of boundary conditions on stress distributions in a single-lap adhesively bonded joint[J]. International Journal of Adhesion&Adhesives,2014,53:34-43.
[2] HE Xiaocong. Clinching for sheet materials[J]. Science&Technology of Advanced Materials,2017,18(1):381-405.
[3]HE Xiaocong,ZHANG Yue,XING Baoying,et al. Mechanical properties of extensible die clinched joints in titanium sheet materials[J]. Materials&Design,2015,71:26-35.
[4]VARIS J P. The suitability of clinching as a joining method for high-strength structural steel[J]. Journal of Materials Processing Technology,2003,132(1):242-249.
[5]LAMBIASE F. Influence of process parameters in mechanical clinching with extensible dies[J]. International Journal of Advanced Manufacturing Technology,2013,66(9/10/11/12):2123-2131.
[6]CHEN Chao,ZHAO Shengdun,CUI Minchao,et al. Mechanical properties of the two-steps clinched joint with a clinch-rivet[J]. Journal of Materials Processing Technology,2016,237:361-370.
[7]CHEN Chao,ZHAO Shengdun,HAN Xiaolan,et al. Optimization of a reshaping rivet to reduce the protrusion height and increase the strength of clinched joints[J]. Journal of Materials Processing Technology,2016,234:1-9.
[8]HE Xiaocong,ZHAO Lun,YANG Huiyan,et al. Investigations of strength and energy absorption of clinched joints[J]. Computational Materials Science,2014,94:58-65.
[9]BALAWENDER T,SADOWSKI T,GOLEWSKI P. Numerical analysis and experiments of the clinch-bonded joint subjected to uniaxial tension[J]. Computational Materials Science,2012,64:270-272.
[10]WATERHOUSE R B. Fretting wear[J]. Wear,1984,100(1):107-118.
[11]周仲荣,LEO Vincent.微动磨损[M].北京:科学出版社,2002:49-82.
[12]周仲荣,朱旻昊.复合微动磨损[M].上海:上海交通大学出版社,2004:57-77.
[13]朱旻昊.径向与复合微动的运行和损伤机理研究[M].成都:西南交通大学出版社,2006:42-83.
[14]BERTHIER Y,VINCENT L,GODET M. Fretting fatigue and fretting wear[J]. Tribology International,1989,22(4):235-242.
[15]HAN L,CHRYSANTHOU A,O’SULLIVAN J M. Fretting behaviour of self-piercing riveted aluminium alloy joints under different interfacial conditions[J]. Materials&Design,2006,27(3):200-208.
[16]HAN L,CHRYSANTHOU A,YOUNG K W,et al. Characterization of fretting fatigue in self‐piercing riveted aluminium alloy sheets[J]. Fatigue&Fracture of Engineering Materials&Structures,2010,29(8):646-654.
[17]周仲荣.微动图在抗微动失效中的应用[J].中国表面工程,1998(1):41-45.
[2] HE Xiaocong. Clinching for sheet materials[J]. Science&Technology of Advanced Materials,2017,18(1):381-405.
[3]HE Xiaocong,ZHANG Yue,XING Baoying,et al. Mechanical properties of extensible die clinched joints in titanium sheet materials[J]. Materials&Design,2015,71:26-35.
[4]VARIS J P. The suitability of clinching as a joining method for high-strength structural steel[J]. Journal of Materials Processing Technology,2003,132(1):242-249.
[5]LAMBIASE F. Influence of process parameters in mechanical clinching with extensible dies[J]. International Journal of Advanced Manufacturing Technology,2013,66(9/10/11/12):2123-2131.
[6]CHEN Chao,ZHAO Shengdun,CUI Minchao,et al. Mechanical properties of the two-steps clinched joint with a clinch-rivet[J]. Journal of Materials Processing Technology,2016,237:361-370.
[7]CHEN Chao,ZHAO Shengdun,HAN Xiaolan,et al. Optimization of a reshaping rivet to reduce the protrusion height and increase the strength of clinched joints[J]. Journal of Materials Processing Technology,2016,234:1-9.
[8]HE Xiaocong,ZHAO Lun,YANG Huiyan,et al. Investigations of strength and energy absorption of clinched joints[J]. Computational Materials Science,2014,94:58-65.
[9]BALAWENDER T,SADOWSKI T,GOLEWSKI P. Numerical analysis and experiments of the clinch-bonded joint subjected to uniaxial tension[J]. Computational Materials Science,2012,64:270-272.
[10]WATERHOUSE R B. Fretting wear[J]. Wear,1984,100(1):107-118.
[11]周仲荣,LEO Vincent.微动磨损[M].北京:科学出版社,2002:49-82.
[12]周仲荣,朱旻昊.复合微动磨损[M].上海:上海交通大学出版社,2004:57-77.
[13]朱旻昊.径向与复合微动的运行和损伤机理研究[M].成都:西南交通大学出版社,2006:42-83.
[14]BERTHIER Y,VINCENT L,GODET M. Fretting fatigue and fretting wear[J]. Tribology International,1989,22(4):235-242.
[15]HAN L,CHRYSANTHOU A,O’SULLIVAN J M. Fretting behaviour of self-piercing riveted aluminium alloy joints under different interfacial conditions[J]. Materials&Design,2006,27(3):200-208.
[16]HAN L,CHRYSANTHOU A,YOUNG K W,et al. Characterization of fretting fatigue in self‐piercing riveted aluminium alloy sheets[J]. Fatigue&Fracture of Engineering Materials&Structures,2010,29(8):646-654.
[17]周仲荣.微动图在抗微动失效中的应用[J].中国表面工程,1998(1):41-45.