The Journal of Adhesion ( IF 2.2 ) Pub Date : 2020-02-09 , DOI: 10.1080/00218464.2020.1724787 M.J. Beigrezaee 1 , M. R. Ayatollahi 1 , B. Bahrami 1 , L.F.M. da Silva 2
ABSTRACT
In this study, the adherend notching technique is reconsidered by introducing a rectangular or a semi-circular notch on the outer surface of the adherends in the single lap joint (SLJ). Firstly, an extensive finite element (FE) analysis was conducted to numerically investigate the effect of different notch parameters on the strength enhancement of the SLJs. Improvement of the peak of peel stress along the overlap length was selected as the determinative factor for obtaining the optimum parameters of the introduced notch. Then, a set of experiments were performed on the notched SLJs based on the optimum notch parameters derived in the FE analyses and the experimental failure loads were compared with the un-notched SLJs. The experimental results showed that introducing a notch can improve the strength of SLJs up to 110% which demonstrates the effectiveness of the proposed technique in this paper. Furthermore, it was seen that there is not a meaningful difference between the improvements of rectangular and semi-circular notch which shows that the improvement of the adherend notching technique are not dependent on the geometry of the introduced notch.
中文翻译:
使用被粘物缺口技术提高单搭接接头强度的新几何形状
摘要
在这项研究中,通过在单搭接接头 (SLJ) 中被粘物的外表面上引入矩形或半圆形凹口,重新考虑了被粘物切口技术。首先,进行了广泛的有限元 (FE) 分析,以数值研究不同缺口参数对 SLJ 强度增强的影响。选择沿重叠长度的剥离应力峰值的改善作为获得引入缺口的最佳参数的决定性因素。然后,基于有限元分析中得出的最佳缺口参数对带缺口的 SLJ 进行了一组实验,并将实验失效载荷与无缺口的 SLJ 进行了比较。实验结果表明,引入缺口可以将 SLJ 的强度提高 110%,这证明了本文所提出技术的有效性。此外,可以看出矩形和半圆形凹口的改进之间没有有意义的差异,这表明被粘物凹口技术的改进不依赖于引入的凹口的几何形状。