焊接温度场数值模拟准确性是焊接应力变形数值的前提.二维模型由于其计算效率高是焊接过程有限元数值模拟的常用模型.然而,三维热源转变为施加在二维平面上的热源需要进行修正.本文提出基于焊缝几何形状的用于二维焊接温度场模拟的热源模型,根据焊缝几何形状来计算热源作用体积,并考虑了焊接移动热源对二维平面的作用,采用高斯分布函数来表征热源在时间上的变化.采用该热源模型对不锈钢板多道对接焊和p91管对接焊的温度场模拟,模拟结果和试验结果符合较好.
参考文献
| [1] | Mackerle J .Finite element analysis and simulation of welding-a bibliography (1976-1996)[J].Modelling & Simulation in Materials Science and Engineering,1996,4(05):501-533. |
| [2] | Tso-Liang Teng;Chih-Cheng Lin .Effect of welding conditions on residtl alstresses due to butt welds[J].Internatioonl Journal of Pressure Vessels and Piping,1998,75(12):857-864. |
| [3] | Yaghi A H;Hyde T H;Becker A A et al.Residual stress simulation in welded sections of Pgl pipes[J].Journal of Materials Processing Technology,2005,167(2-3):480-487. |
| [4] | B. Brickstad;B. L. Josefson .A parametric study of residual stresses in multi-pass butt-welded stainless steel pipes[J].International Journal of Pressure Vessels and Piping,1998(1):11-25. |
| [5] | Goldak J;Chakravarti A;Bibby M .A new finite element model for welding heat source[J].Metallurgical and Materials Transactions B:Process Metallurgy and Materials Processing Science,1984,15(02):299-305. |
| [6] | Shahram Sarkani;Vesselin Tritchkov;George Michaelov .An efficient approach for computing residual stresses in welded joints[J].Finite elements in analysis & design,2000(3):247-268. |
| [7] | S. Murugan;P. V. Kumar;B. Raj;M. S. C. Bose .Temperature distribution during multipass welding of plates[J].International Journal of Pressure Vessels and Piping,1998(12):891-905. |
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