Finite element analysis of temperatures and stresses in a single‐pass butt‐welded pipe—influence of mesh density and material modelling
Finite element analysis of temperatures and stresses in a single‐pass butt‐welded pipe—influence of mesh density and material modelling
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单道对接焊管温度和应力的有限元分析——网格密度和材料建模的影响
DOI：
10.1108/eb023767
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发表时间：
1989
影响因子：
1.6
通讯作者：
C. Karlsson
中科院分区：
文献类型：
--
作者：
C. Karlsson
采用有限元程序ADINAT/ADINA对碳锰管的单道环对接焊接进行了数值研究。热分析和力学分析均采用旋转对称有限元模型。利用该模型研究了管道几何形状、网格密度和材料建模对残余应力状态的影响。本文的研究结果与先前两种不同的有限元分析和一项实验研究的结果进行了比较。其中一种有限元分析是完全三维的，另一种采用壳单元。计算得到的残余应力只有在采用不同材料模型时才有显著差异。热应变似乎是对残余应力状态影响最大的材料参数。尤其是相变过程中热应变的变化对其影响较大。这意味着温度场应该足够精确地确定，以预测不同相变发生的时间和地点。对于两种不同形状和焊接参数的管道，得到了几乎相同的残余应力。
Single‐pass girth butt welding of a carbon‐manganese pipe is studied numerically using the finite element codes ADINAT/ADINA. A rotationally symmetric finite element model is employed in both the thermal and mechanical analysis. This model is used to investigate the influence on the residual stress state of pipe geometry, mesh density and material modelling. The results from the present study are compared with previous results from two different FE analyses and an experimental investigation. One of the FE analyses was fully three dimensional and the other employed shell elements. The calculated residual stresses were found to differ significantly only when different material models were employed. The thermal strain seemed to be the material parameter with the largest influence on the residual stress state. Especially the changes in thermal strain during phase transformations seemed to have a great influence. This means that the temperature field should be determined accurately enough to predict when and where the different phase transformations occur. Almost the same residual stresses were obtained for two pipes with different pipe geometries and weld parameters.