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	铝合金薄板焊接应力三维有限元模拟
	张建强 ; 张国栋 ; 赵海燕 ; 岳红杰 ; 张海泉 ; 鹿安理 ; ZHANG Jianqiang ; ZHANG Guodong ; ZHAO Haiyan ; YUE Hongjie ; ZHANG Haiquan ; LU Anli
	2010-06-08 ; 2010-06-08
关键词	铝合金薄板 脉冲TIG焊 有限元 焊接应力 失稳 thin aluminum alloy plate pulsed tungsten inert-gas welding finite element method welding stress buckling TG457.14 TG407
其他题名	3D-FEM numerical simulation of welding stress in thin aluminum alloy plate
中文摘要	采用热弹塑性有限元方法,对铝合金薄板脉冲TIG焊接接头的焊接应力进行了三维数值模拟,考虑材料性能随温度的变化,对焊接残余应力进行测量。结果表明,铝合金薄板中的焊接应力产生、发展很快,加热结束后不久应力便趋于稳定。热源前缘和两侧区域存在数值很高的纵向和横向动态压应力,焊缝中心的纵向残余拉应力低于母材的屈服强度,距焊缝中心10 mm处的最大纵向残余拉应力达到母材的屈服强度,并且拉应力区较宽,远离焊缝区域的纵向残余压应力数值较大,因此铝合金薄板焊接结构易发生动态和焊后失稳,横截面上纵向残余应力的数值模拟结果与实测结果基本一致。; The three-dimensional numerical simulation on welding stress in pulsed TIG welded joint of aluminum alloy thin plate was performed by means of thermal-elastic-plastic FEM technology.The welding residual stress was measured by Mathar method.The results show that the welding stress generates and develops rapidly during welding process.The welding stress achieves the value of stable state before long heating end.The large instantaneous longitudinal and transversal compress stresses exist in the front and by both sides of heat source.The longitudinal residual stress in the welding center is less than the yield strength of base metal,and the maximum longitudinal residual stress at 10 mm away from weld center is up to the yield strength of base metal,and the width of tensile stress zone is quite wide,and the compressive residual stress away from weld is quite large.Therefore,the buckling occurs easily in thin aluminum alloy plate during and after welding.The numerical simulation results of the longitudinal residual welding stress in the cross section of thin aluminum alloy plate is compatible with the measuring result.; 国家计委产业化前期关键技术研究项目(计高技[1998]2077号); 清华大学985重点项目
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/47813]
专题	清华大学
推荐引用方式 GB/T 7714	张建强,张国栋,赵海燕,等. 铝合金薄板焊接应力三维有限元模拟[J],2010, 2010.
APA	张建强.,张国栋.,赵海燕.,岳红杰.,张海泉.,...&LU Anli.(2010).铝合金薄板焊接应力三维有限元模拟..
MLA	张建强,et al."铝合金薄板焊接应力三维有限元模拟".(2010).

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