【摘要】 基于ANSYS有限元分析系统,建立用于点焊瞬态热过程分析的电热耦合有限元模型,考虑随温度变化的材料特 性参数、相变以及对流边界条件等,对点焊过程中的接触问题进行适当简化。通过对低碳钢薄板点焊过程的分析,得到 点焊接头的温度场及各部位的热历程,模拟了焊核形成过程,求得焊核及热影响区的形状和尺寸。更多还原

【Abstract】 A thermoelectric FEM model is developed to analyze the transient thermal behavior of resistance spot welding process,using ANSYS program.The contact problem is moderately simplified,while the temperature dependent material properties,phase change and convectional boundary conditions are taken into account.The thermal history and temperature distributions in the weldment of mild steel are obtained through the analysis.The model can also simulate the forming of welding nugget,and predict the size of nugget and HAZ.更多还原