组合载荷试验中载荷角对电阻点焊搭接接头静强度的影响

IF 0.5 4区 材料科学 Q4 METALLURGY & METALLURGICAL ENGINEERING
T. Akiyama, T. Kitamura, Tetsushi Ono
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引用次数: 0

摘要

电阻点焊搭接接头的强度是一个非常有趣的课题。JIS规定拉伸剪切试验和交叉拉伸试验作为组合载荷下的现实环境。然后,提出了许多强度预测方程。而这些特征都是在使用一个阈值为基础的基材强度作为断裂条件。交叉拉伸强度与开口角之间的关系式只考虑开口角对作用在母材上的几何轴向力的影响。但它很好地解释了实验结果。已知电阻点焊搭接接头在复合载荷下的强度与载荷角度有关。但断裂的原因究竟是由以往方程所显示的几何影响,还是由于载荷角度的变化导致断裂机制的改变,目前还不清楚。在本研究中,我们利用材料动力学模型考察了宏观几何因素对载荷角的依赖程度,然后研究了核块裂纹起裂部位附近载荷角对微观断裂机制的依赖程度。因此,我们能够解释载荷角与宏观模型的相关性。(doi: 10.2320 / jinstmet.J2017040)
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Dependence of Load Angle on Static Strength of Resistance Spot Welded Lap Joint in Combined Load Test
Strength of resistance spot welded lap joint is a very interesting task. JIS prescribes tensile shear test and cross tension test as a realistic environment in combined load. Then, a lot of strength prediction equations have been proposed. And these features are in the use of a threshold value based on the base material strength as a fracture condition. The relational expression between the cross tension strength and the opening angle deals only with the infl uence of the opening angle on the axial force acting geometrically on the base metal. But it explains the experimental results well. The strength of resistance spot welded lap joint in combined load is known to exhibit dependence of load angle. But it is not clear whether the cause is only the geometric infl uence as shown by the past equations or the fracture mechanism change depend on the load angle. In this study, we examined how much dependence of load angle can be explained by macro geometric factors using a material dynamics model, before studying the micro fracture mechanism depend on the load angle in the vicinity of the crack initiation part of the nugget. As a result, we were able to explain the dependence of load angle with the macro model. [doi:10.2320/jinstmet.J2017040]
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来源期刊
Journal of The Japan Institute of Metals
Journal of The Japan Institute of Metals 工程技术-冶金工程
CiteScore
0.70
自引率
0.00%
发文量
27
审稿时长
6-12 weeks
期刊介绍: Information not localized
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