相变潜热对焊接数值模拟的影响

许波; 周建平; 许燕; 李建军; 王恪典

doi:10.13568/j.cnki.651094.2019.04.004

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相变潜热对焊接数值模拟的影响

更新时间：2026-01-21

- 相变潜热对焊接数值模拟的影响
- Journal of Xinjiang University (Natural Science Edition in Chinese and English) Vol. 36, Issue 4, Pages: 400-405(2019)
- 作者机构：
  
  1. 新疆大学机械工程学院
  2. 西安交通大学机械工程学院
- 作者简介：
- 基金信息：
- DOI：10.13568/j.cnki.651094.2019.04.004
  CLC： TG40
- Published：2019
- 稿件说明：
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[1]许波,周建平,许燕,等.相变潜热对焊接数值模拟的影响[J].新疆大学学报(自然科学版),2019,36(04):400-405.
[1]许波,周建平,许燕,等.相变潜热对焊接数值模拟的影响[J].新疆大学学报(自然科学版),2019,36(04):400-405. DOI： 10.13568/j.cnki.651094.2019.04.004.

DOI：10.13568/j.cnki.651094.2019.04.004.

摘要

基于热弹塑性理论

通过是否考虑相变潜热进行数值计算并通过实验验证

探究焊接相变潜热对焊接数值模拟的影响.结果表明:考虑相变潜热计算所得熔深4.2 mm

熔宽8.2 mm

实验所得熔深4.9 mm

熔宽8.2 mm

所得熔池尺寸与实际焊缝形貌尺寸基本吻合;不考虑相变潜热时

计算出的熔池温度为2 367℃

比实际温度高150℃

热影响区温度为1 189℃

比实际温度高100℃

但二者在冷却阶段差别不大;相变潜热对横向残余应力和厚度方向残余应力峰值有略微影响

差值分别为7 MPa和10 MPa

对纵向残余应力和等效残余应力峰值影响不大.相变潜热对焊接温度场计算影响较明显

对焊接应力场计算影响较小.

Abstract

Based on thermo-elastic-plastic theory

the influence of welding phase change latent heat on welding numerical simulation is studied. The numerical calculation is carried out by considering the phase change latent heat and is verified by experiments.The results show that the calculated melting depth is 4.2 mm

the melting width is 8.2 mm

the experimental melting depth is 4.9 mm and the melting width is 8.2 mm. The calculated melting pool size is consistent with the actual weld morphology size.When the latent heat of phase transformation is not considered

the calculated temperature of molten pool is 2 367℃

150℃ higher than the actual temperature

the temperature of heat affected zone is 1 189℃

100℃ higher than the actual temperature

but there is little difference between the two in the cooling stage. The latent heat of phase transformation has a slight effect on the peak values of transverse and thickness residual stresses

and the difference is 7 MPa and 10 MPa

respectively.It has little effect on the peak values of longitudinal and equivalent residual stresses. The latent heat of phase transformation has obvious influence on the calculation of welding temperature field

but little influence on the calculation of welding stress field.

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references

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