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首页> 外文会议>PVP2011;ASME Pressure Vessels and Piping conference >NUMERICAL AND EXPERIMENTAL EVALUATION OF RESIDUAL STRESSES IN DISSIMILAR WELD JOINTS
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NUMERICAL AND EXPERIMENTAL EVALUATION OF RESIDUAL STRESSES IN DISSIMILAR WELD JOINTS

机译：异种焊接接头残余应力的数值和实验评估

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摘要

This paper describes finite element modelling of residual stresses in tubular dissimilar weld joints. To validate numerical approach, residual stresses are determined experimentally in various locations of the welded specimen by using complementary methods such as neutron diffraction technique and increment hole drilling method combined to speckle interferometry. Dissimilar metal weld specimens (DMW), representative of configurations in primary coolant circuit of pressurized water nuclear reactors, are produced using AISI 316L stainless steel and low alloy carbon 16MND5 steel as base materials and a nickel based filler metal (Inconel 82) for buttering of the ferritic side and the filling between the buttered pipe and stainless steel one. The simulation of the manufacturing procedure of the DMW specimen is firstly performed thanks to an equivalent heat source. Secondly, the mechanical behaviour is calculated by using the computed thermo-metallurgical history for each welded pass. The "birth and death" elements method is used to simulate the addition of filler metal for this multi-pass welding configuration. A relatively good agreement is observed between the calculated and experimental results.
机译：本文介绍了管状异种焊接接头中残余应力的有限元建模。为了验证数值方法，通过使用互补方法（例如中子衍射技术和增量孔钻孔方法与散斑干涉法相结合），在焊接样品的各个位置上通过实验确定了残余应力。以AISI 316L不锈钢和低合金碳16MND5钢为基础材料，并使用镍基填充金属（Inconel 82）制作了用于压水核反应堆主冷却剂回路结构的异种金属焊接试样（DMW）。铁素体面和黄油管与不锈钢之间的填充物。首先要借助等效的热源对DMW样品的制造过程进行仿真。其次，通过使用计算出的每个焊接道次的热冶金历史来计算机械性能。 “生与死”元素方法用于模拟此多道次焊接配置中添加的填充金属。在计算结果和实验结果之间观察到相对较好的一致性。

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