Debonding Criterion for Single Lap Joints from the Intensity of Singular Stress Field
Debonding Criterion for Single Lap Joints from the Intensity of Singular Stress Field
复制标题
基于奇异应力场强度的单搭接接头脱粘准则
DOI：
10.5104/jiep.16.143
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发表时间：
2013
影响因子：
--
通讯作者：
Y. Sano
中科院分区：
文献类型：
--
作者：
T. Miyazaki;N. Noda;Rong Li;Takumi Uchikoba;Y. Sano
在这项研究中，粘接强度被认为是新的奇异应力出现在胶粘剂和粘附之间的界面端部。在这里，奇异应力的临界强度被检查作为所有类型的单搭接接头具有不同的胶粘剂厚度和搭接长度的脱粘准则。奇异应力的强度可以通过应用有限元方法来评估，重点是界面端部单元处的应力值。应注意的是，除了小重叠长度的情况下，分离总是发生在界面的边缘，导致不稳定的增长和最终的脆性断裂。在这种类型的断裂，它被发现，应力奇异场的临界强度是恒定的粘接剂的厚度和重叠长度无关。
In this study, adhesive strength is newly considered in terms of the singular stress appearing at the end of the interface between the adhesive and the adherent. Here the critical intensity of the singular stress is examined as the debonding criterion for all types of single lap joints having different adhesive thickness and overlap length. The intensity of the singular stress can be evaluated by the application of the finite element method focusing on the stress value at the end element of the interface. It should be noted that, except for the case of small overlap length, the separation always occurs at the edge of the interface caus-ing unstable growth and final brittle fracture. In this type of fracture, it is found that the critical intensity of the stress singular field is constant independent of the adhesive thickness and overlap length.