Evaluation of the fatigue strength of adhesively bonded CFRP/metal single and single-step double-lap joints
Evaluation of the fatigue strength of adhesively bonded CFRP/metal single and single-step double-lap joints
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DOI：
10.1016/s0266-3538(99)00028-7
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发表时间：
1999-01-01
影响因子：
9.1
通讯作者：
Kodama, H
中科院分区：
文献类型：
--
作者：
Ishii, K;Imanaka, M;Kodama, H
一般情况下，胶接接头的胶层处于多轴应力集中状态。因此，在估算胶接接头的强度时，必须考虑应力的多轴性和应力的集中分布。在我们之前的研究中。[1]考虑到CFRP/铝对接、嵌接和厚被粘搭接接头的应力多轴性，提出了一种考虑应力多轴性的CFRP/铝搭接接头的疲劳失效准则。另一个决定粘接接头强度特性的参数是由于粘接剂/被粘物界面角部处的应力奇异性而引起的集中应力分布。最近，应力奇异性参数已被用来评估粘接接头的强度。然而，很少有研究从这个角度来评估疲劳强度。提出了一种基于两个应力奇异性参数的CFRP-铝合金单搭接、跟踪单搭接和单步双搭接接头疲劳强度的估算方法。(C)1999 Elsevier Science Ltd.保留所有权利。
Generally, the adhesive layer of an adhesively bonded joint is under a state of concentrated multiaxial stress. Hence, stress multiaxiality and concentrated stress distributions must be taken into account in estimating the strength of adhesive joints. In our previous study. [1], a fatigue-failure criterion was investigated which took account of the stress multiaxiality in adhesively bonded CFRP/aluminum butt, scarf and thick-adherend lap-shear joints, which have uniform stress distributions in the adhesive layer. Another parameter governing the strength characteristics of the adhesive joints is the concentrated stress distribution due to the stress singularity at the corners of the adhesive/adherend interface, Recently, stress-singularity parameters have been used to evaluate the strength of adhesive joints. However, there are few studies evaluating the fatigue strength from this point of view. In this study, a method of estimating the fatigue strengths of adhesively bonded single-lap, tracked single-lap and single-step double-lap joints composed of CFRP and an aluminum alloy is proposed which is based on two stress-singularity parameters. (C) 1999 Elsevier Science Ltd. All rights reserved.