薄板激光搭接焊缝的强度评价

发布时间：2018-06-05 05:51

本文选题：激光搭接焊缝 + 剪切试验　；参考：《沈阳工业大学学报》2017年01期

【摘要】：针对列车车体上激光搭接焊缝需要进行强度评价的问题,采用试验和数值模拟相结合的方法研究了焊缝强度的影响因素和评价方法.采用ANSYS软件进行数值模拟,验证了断裂位置从焊缝向薄板转移的现象.结果表明:当焊缝宽度小于两板中的最小板厚时,焊缝宽度和拉剪力呈近似线性关系;当焊缝宽度超过最小板厚时,拉剪力达到最大值后不再随焊缝宽度的增加而增加;焊缝熔深和板间隙对拉剪力的影响不明显.根据建立的焊缝宽度和拉剪力关系,实现了通过无损检测焊缝宽度来评价焊缝强度的目的.
[Abstract]:Aiming at the need to evaluate the strength of the laser lap weld on the train body, the influence factors and evaluation methods of the weld strength are studied by means of the combination of test and numerical simulation. The numerical simulation by ANSYS software verifies the phenomenon that the fracture position is transferred from weld seam to thin plate. The results show that when the weld width is less than the minimum plate thickness of the two plates, the weld width and the tensile shear force are approximately linear, and when the weld width exceeds the minimum plate thickness, the tensile shear force does not increase with the increase of the weld width. The effect of weld penetration and plate clearance on tensile shear force is not obvious. According to the relationship between weld width and tensile shear force, the purpose of evaluating weld strength by nondestructive testing of weld width is achieved.
【作者单位】：中国科学院金属研究所分析测试部;中车青岛四方车辆股份公司技术工程部;辽宁石油化工大学机械工程学院;
【基金】：辽宁省高等学校优秀人才支持计划项目(LR2012011)
【分类号】：U270.6;TG456.7

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