The behaviour of single lap joints under bending loading
The behaviour of single lap joints under bending loading
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DOI：
10.1080/01694243.2012.761926
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发表时间：
2013-07
影响因子：
2.3
通讯作者：
E. Karachalios;R. Adams;L. D. da Silva
中科院分区：
文献类型：
--
作者：
E. Karachalios;R. Adams;L. D. da Silva
四点弯曲试验进行了单搭接接头与硬钢粘合剂和结构环氧胶粘剂。研究了重叠、粘接厚度和胶粘剂厚度对粘接效果的影响。结果表明，重叠长度对节点强度无显著影响。这是因为负载转移发生在重叠边缘的非常局部的区域，是由剥离机制控制的失败。附着物的厚度强烈地影响着关节的强度。黏合剂越厚，关节就越牢固。将试验结果与有限元模型进行了比较，证实了重叠端部的局部应变是破坏的主要原因。给出了一种简单而有效地预测接头强度及其与附着层厚度关系的解析模型。
Four-point bend tests were performed on single lap joints with hard steel adherends and a structural epoxy adhesive. The effect of the overlap, the adherend thickness and the adhesive thickness was studied. It was found that the length of the overlap has no significant effect on the strength of the joints. This is because the load transfer is occurring in a very localised area around the edges of the overlap, being the failure governed by peel mechanisms. The thickness of the adherends strongly affects the strength of the joints. The thicker the adherend, the stronger is the joint. The experimental results are compared with a finite element model and reinforce the fact that the failure takes place due to local strains at the ends of the overlap in tension. An analytical model is also given to predict in a simple but effective way the joint strength and its dependence on the adherend thickness.