The toughness and the durability under a high humidity condition of the interfaces in dissimilar adhesive joints of carbon-fiber-reinforced thermoplastic with a polyamide-6 matrix and Al alloy were evaluated by two test methods, in which a tensile opening load was applied to the specimens to cleave the interfaces apart in two different ways. In the double cantilever beam (DCB) test, the specimens were continuously pulled apart at a constant velocity, while in the wedge test, the specimens are pulled apart at a constant displacement. The crack growth along the interface in the DCB test was dynamically monitored with the assistance of mechanoluminescence for the accurate detection of the phenomena at the crack tip. The wedge test was employed for the evaluation of the durability of the interfaces under high humidity conditions. It was found that the adhesive joints were failed by various failure modes depending on the surface pretreatment and environmental conditions. Throughout the work, discussion was made concerned with the interfacial structures and the adhesion mechanism of dissimilar adhesive joints.

中文翻译：

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铝和碳纤维增强热塑性塑料异种粘合接头中界面的韧性和耐久性

通过两种测试方法评估碳纤维增强热塑性塑料与聚酰胺6基体和铝合金的异种胶粘接头中界面的韧性和在高湿度条件下的耐久性，其中将拉伸开放载荷施加到纤维上。标本以两种不同方式将界面分开。在双悬臂梁（DCB）测试中，将样本以恒定速度连续拉开，而在楔形测试中，将样本以恒定位移拉开。在机械发光的辅助下，动态监测了DCB测试中沿界面的裂纹扩展，以准确检测裂纹尖端的现象。楔形测试用于评估高湿度条件下的界面耐久性。已经发现，取决于表面预处理和环境条件，粘合剂接头由于各种失效模式而失效。在整个工作中，讨论了异种粘合剂接头的界面结构和粘合机理。