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DP780双相钢电阻点焊的数值模拟及试验验证

孙晓屿, 黄雷, 王武荣, 韦习成

孙晓屿, 黄雷, 王武荣, 韦习成. DP780双相钢电阻点焊的数值模拟及试验验证[J]. 焊接学报, 2016, 37(4): 85-88.
引用本文: 孙晓屿, 黄雷, 王武荣, 韦习成. DP780双相钢电阻点焊的数值模拟及试验验证[J]. 焊接学报, 2016, 37(4): 85-88.
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SUN Xiaoyu, HUANG Lei, WANG Wurong, WEI Xicheng. Numerical simulation and experimental verification of resistance spot welding with DP780 dual-phase steel[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(4): 85-88.
Citation: SUN Xiaoyu, HUANG Lei, WANG Wurong, WEI Xicheng. Numerical simulation and experimental verification of resistance spot welding with DP780 dual-phase steel[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(4): 85-88.
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DP780双相钢电阻点焊的数值模拟及试验验证

  • 上海大学材料科学与工程学院, 上海 200072

基金项目: 国家自然科学基金资助项目(51475280);上海汽车工业科技发展基金资助项目 (1306)

Numerical simulation and experimental verification of resistance spot welding with DP780 dual-phase steel

  • School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China

摘要

    摘要
  • 摘要: 为了提高实际生产中的焊点质量,探究影响焊点质量的因素,针对厚度分别为1.6和2.0 mm的DP780样片组,建立电阻点焊过程的轴对称有限元模型,采用融合力场、热场、电场及微观组织结构的耦合分析模型模拟点焊熔核形成过程,研究点焊加热及冷却过程中的温度场分布特点,确定熔核尺寸和抗剪强度指标.通过试验测定实际点焊接头的熔核尺寸以及抗剪强度.结果表明,模拟预测的熔核尺寸、失效剪切力与试验值之间误差分别为2.05%和13.6%;焊接过程中的飞溅是导致误差的主要原因.
    Abstract: To improve the spot weld quality in the manufacturing process and study the factors effecting spot weld, a finite element model of DP780 with thickness of 1.6 mm and 2.0 mm was established, which was used to analysis the process of resistance spot welding. The strength indexes like failure shear force and nugget size are calculated by the model integrating force field, temperature field, electric field and microstructure. In addition, the welding nugget size was measured and failure shear force was also examined by using KSⅡ device. The numerical simulation results have errors of 2.05% and 13.6% compared to experiments, respectively. The errors are mainly caused by splash.
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    • 参考文献(12)
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  • 收稿日期:  2014-07-04

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