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俞建荣, 何晓祥, 吴波, 陈海洋, 李晓东. 受约束内覆薄壁管对接焊温度场和应力场的数值模拟[J]. 焊接学报, 2010, (9): 65-68.
引用本文: 俞建荣, 何晓祥, 吴波, 陈海洋, 李晓东. 受约束内覆薄壁管对接焊温度场和应力场的数值模拟[J]. 焊接学报, 2010, (9): 65-68.
YU Jianrong, HE Xiaoxiang, WU Bo, CHEN Haiyang, LI Xiaodong. Simulation of temperature field and residual stress field of thin inner layer on butt welding of clad pipe[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2010, (9): 65-68.
Citation: YU Jianrong, HE Xiaoxiang, WU Bo, CHEN Haiyang, LI Xiaodong. Simulation of temperature field and residual stress field of thin inner layer on butt welding of clad pipe[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2010, (9): 65-68.

受约束内覆薄壁管对接焊温度场和应力场的数值模拟

Simulation of temperature field and residual stress field of thin inner layer on butt welding of clad pipe

  • 摘要: 针对复合管对接焊时,较厚的外层基材对内衬薄管焊接的温度场分布和应力场变化的约束影响,以及基材与薄管的接触效应,运用有限元法,在焊接过程使用"时间幅值"和"单元联接"等技术,建立了相应的有限元分析模型,计算了复合管对接焊内衬薄管的温度场变化和焊后残余应力的分布状况.通过计算,对薄管焊接速度、应力进行了分析讨论,并对薄板材料性质、结构尺寸、焊接热输入等焊接失稳变形的影响因素进行了研究.结果表明,薄板结构尺寸、焊接热输入对变形影响较大,而材料性质相对影响较小.

     

    Abstract: The clad pipe has a thin inner layer made of stainless steel and a thick outer layer made of carbon steel,and the outer layer has some restriction on the temperature change surrounding the inner layer when butt-welding the inner layer.With finite element method,the temperature field was computed when butt welding inner layer and the stress field of inner layer was computed after butt welding.The convection,radiation and contact effect between the two layers were considered in the FEM model as well as temperature depended material properties.Internal heat generation loading method was applied to simulate heat source,and model change ability to simulate butt weld.The velocity of inner layer butt weld,the temperature and stress field of the inner layer were discussed.Meanwhile the influence of the properties of material,geometry of the plate and the welding heat input on buckling distortion were analyzed based on the simulations.The results indicate that the geometry of the plate and the welding heat input have more effect on distortion than the properties of material.

     

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