Abstract The aim of this study was to investigate the effect of a spew fillet on adhesively bonded single lap joints (SLJs) with carbon fiber-reinforced plastic (CFRP) and an aluminum alloy immersed in distilled water. After the SLJs with and without the spew fillet were immersed in distilled water for a specified aging time, the strengths of the SLJs were measured via quasi-static axial tensile experiments, and the strain distribution at the side interface of the adhesive layer in the joints was obtained via digital image correlation (DIC) technology. The tensile test results showed that the strength of the SLJs can be significantly improved by introducing the spew fillet, and the strength of the SLJs decreased as the aging time increased both with and without the fillet. However, compared with the SLJs without the fillet, the strength of the SLJs with the fillet decreased further. The DIC results showed that the main reason for the influence of the fillet on the SLJs was that the fillet enhanced the peel strength and shear strength of the adhesive layer in the overlap area.

中文翻译：

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喷射圆角对碳纤维布和铝合金浸在蒸馏水中的胶粘单搭接接头的影响

摘要 本研究的目的是研究喷出圆角对碳纤维增强塑料 (CFRP) 和浸入蒸馏水中的铝合金粘合单搭接接头 (SLJ) 的影响。将带和不带喷溅圆角的SLJs在蒸馏水中浸泡指定的老化时间后，通过准静态轴向拉伸实验测量SLJs的强度，以及接头处胶层侧界面的应变分布是通过数字图像相关 (DIC) 技术获得的。拉伸试验结果表明，SLJs 的强度可以通过引入 spew 圆角显着提高，并且 SLJs 的强度随着时效时间的增加而降低，无论有没有圆角。然而，与没有圆角的 SLJ 相比，带有圆角的 SLJ 的强度进一步降低。DIC结果表明，圆角对SLJs影响的主要原因是圆角增强了重叠区域胶粘层的剥离强度和剪切强度。