On the strength and interfacial properties of square wave joints with defects and mismatches
On the strength and interfacial properties of square wave joints with defects and mismatches
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DOI：
10.1080/00218464.2020.1742708
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发表时间：
2020-04
期刊：
影响因子：
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通讯作者：
W. Guo;Peijian Chen;Hao Liu;Yugui Yang;Guangjian Peng;Zhitong Chen
中科院分区：
文献类型：
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作者：
W. Guo;Peijian Chen;Hao Liu;Yugui Yang;Guangjian Peng;Zhitong Chen
本文分析了方波节点在拉伸状态下的强度和界面性能。采用双线性内聚区模型，考虑了实际应用中的三个主要因素，包括几何参数、预存缺陷和失配。研究发现，通过适当调整接头的几何参数，可以提高接头的强度和断裂韧性。另外，缺陷长度对胶接接头力学性能的影响与缺陷位置不同。胶接过程中压紧被粘物、使胶接部分尽可能对称、方波塞上引入突起等措施有助于改善接头的力学性能。研究结果对于方波接头的设计和胶接接头的力学性能评估具有一定的参考价值。
ABSTRACT In the present paper, the strength and interfacial properties of square-wave joints under tension are analyzed. By using the bilinear cohesive zone model, three main factors in practice, including geometric parameters, preexisting defects and mismatches, are considered. It is found that the strength and fracture toughness of the joints can be improved by proper adjustment of geometric parameters of the joint. What is more, the length of defect has a great influence on the mechanical properties of the adhesive joints, different from the defect’s location. Compacting adherends tightly during glue consolidation, making the bonding part as symmetrical as possible and introducing some protuberances on square-wave plug are found to be helpful to improve the joints’ mechanical behavior. The findings should be useful for the design of square-wave joints and the assessment of mechanical properties of adhesive joints in practical and potential applications.