Stress Concentration Modelling on Resistance Spot Welding Lap Joint of Steel ASS316L and Titanium Ti-6Al-4V with Variable Weld Geometries

Key Engineering Materials Pub Date : 2024-07-03 DOI:10.4028/p-uSG7cu

Nithia Kumar, Muhammad Safwan Mohd Mansor, Irfan Anjum Badruddin, Mohamed Hussein, S. Kamangar

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Abstract

This research is a finite element simulation on resistance spot welding (RSW) process between dissimilar sheet metals consist of Titanium alloy, Ti-6Al-4V and Austenitic Stainless Steel (ASS) 316L. The problem statement was inability to visualize the stress concentration profile over weld nugget joint when Titanium alloy and steel welded with variable electrode geometry of circle, triangle, square and hexagon. To determine the best geometry for best weld with lowest maximum stress concentration. The methodology of simulation was tensile-shear test using SOLIDWORKS software. The tensile-stress load of 664.09 N was applied across all 4 different weld geometries. The result for the lowest magnitude of maximum stress 180.6 MPa was on circle weld geometry. Triangle geometry registered highest stress concentration of 219.6 MPa. This proves that most common weld geometry used in industry was circle. Even for dissimilar material joint the result supports that circle weld geometry as the best geometry. Keywords: Resistance spot welding (RSW), stress concentration, weld nugget, weld geometry.

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钢 ASS316L 和钛 Ti-6Al-4V 电阻点焊搭接应力集中模型（焊接几何形状可变

本研究是对由钛合金、Ti-6Al-4V 和奥氏体不锈钢 (ASS) 316L 组成的异种金属板之间的电阻点焊 (RSW) 过程进行有限元模拟。问题在于，当钛合金和钢采用圆形、三角形、方形和六角形等不同几何形状的电极进行焊接时，无法直观地看到焊点上的应力集中曲线。要确定最佳几何形状，以实现最大应力集中最小的最佳焊接。模拟方法是使用 SOLIDWORKS 软件进行拉伸剪切试验。对所有 4 种不同的焊接几何形状施加 664.09 N 的拉伸应力载荷。结果显示，圆形焊接几何形状的最大应力最小，为 180.6 兆帕。三角焊缝的应力集中度最高，为 219.6 兆帕。这证明工业中最常用的焊接几何形状是圆形。即使对于异种材料接头，结果也证明圆形焊缝几何形状是最佳几何形状。关键词电阻点焊 (RSW)、应力集中、焊瘤、焊接几何形状。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Key Engineering Materials

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