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首页> 外文期刊>Journal of Mechanical Science and Technology >Finite element analysis and measurement for residual stress of dissimilar metal weld in pressurizer safety nozzle mockup
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Finite element analysis and measurement for residual stress of dissimilar metal weld in pressurizer safety nozzle mockup

机译：增压器安全喷嘴样机中异种金属焊缝残余应力的有限元分析与测量

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摘要

Finite element (FE) analysis and experiment for weld residual stress (WRS) in the pressurizer safety nozzle mockup is described in various processes and results. Foremost of which is the dissimilar simulation metal welding (DMW) between carbon steel and austenitic stainless steel. Thermal and structural analyses were compared with actual residual stress, and actual measurements of. Magnitude and distribution of WRS in the nozzle mockup were assessed. Two measurement methods were used: hole-drilling method (HDM) with strain gauge for residual stress on the surface of the mockup, and block removal and splitting layer (BRSL) method for through-thickness. FE analysis and measurement data showed good agreement. In conclusion, the characteristics of weld residual stress of DMW could be well understood and the simplified FE analysis was verified as acceptable for estimating WRS.
机译：在各种过程和结果中描述了加压器安全喷嘴模型中的焊接残余应力（WRS）的有限元（FE）分析和实验。其中最重要的是碳钢和奥氏体不锈钢之间的模拟金属焊接（DMW）。将热和结构分析与实际残余应力进行比较，并进行实际测量。评估了喷嘴样机中WRS的大小和分布。使用了两种测量方法：带应变仪的钻孔法（HDM）用于测量模型表面上的残余应力，而块厚度去除和分离层（BRSL）方法用于贯穿厚度。有限元分析和测量数据显示出良好的一致性。总之，可以很好地理解DMW焊缝残余应力的特征，并证明简化的有限元分析对于估算WRS是可以接受的。

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