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首页> 外文期刊>Applied Mathematical Modelling >Modeling and numerical simulation of the resistance spot welding of zinc coated steel sheets using rounded tip electrode: Analysis of required conditions
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Modeling and numerical simulation of the resistance spot welding of zinc coated steel sheets using rounded tip electrode: Analysis of required conditions

机译：圆形尖端电极对镀锌钢板电阻点焊的建模和数值模拟：所需条件分析

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摘要

This paper investigates the essential conditions to improve the accuracy of a resistance spot welding computational study of advanced zinc coated steel sheets using rounded tip electrode. An experimental analysis is performed to highlight the required considerations for a suitable simulation. A sequential Electrical-Thermal-Metallurgical and Mechanical (ETMM) finite element analysis with appropriate precautions of the contact conditions enables to accurately simulate the nugget development during the welding. A critical smooth evolution of the contact radius is required. A fine meshing with an interfa-cial mesh size of at least 0.05 × 10~(-3) m combined with a coupling time step of 0.0025 s between the electrical-thermal-metallurgical and the mechanical analysis allows a regular incrementation of the contact radius, without burdening the time computing. Accurate values of the contact resistance depending on the interfacial pressure and temperature are essential for a good simulation of the nugget size. The ETMM calculation is successfully extended to the simulation of the welding of a typical two sheets assembly.
机译：本文研究了提高先进的镀锌钢板使用圆形尖端电极的电阻点焊计算研究的准确性的必要条件。执行实验分析以突出显示合适的模拟所需的注意事项。连续的电热冶金和机械（ETMM）有限元分析以及适当的接触条件预防措施，可以准确地模拟焊接过程中熔核的发展。需要接触半径的临界平滑变化。细网孔的界面尺寸至少为0.05×10〜（-3）m，并且电热冶金和机械分析之间的耦合时间步长为0.0025 s，因此可以规则地增加接触半径，而不会增加计算时间。取决于界面压力和温度的准确接触电阻值对于良好模拟熔核尺寸至关重要。 ETMM计算成功地扩展到了典型的两片组件的焊接仿真。

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