The application of adhesively bonded joints in automotive industry has increased significantly in recent years mainly because of the potential for lighter weight vehicles, fuel savings and reduced emissions. The use of composites in making automotive body components to achieve a reduced vehicle mass has also continuously increased. Natural fibre composites have recently attracted a great deal of attention by the automotive industry due to their many attractive benefits (e.g. high strength-to-weight ratio, sustainable characteristics and low cost). However, the literature on natural fibre-reinforced polymer composite adhesive joints is scarce and needs further investigation. The main objective of this study was to evaluate and compare the mechanical performance of adhesively bonded joints made of synthetic- and natural fibre-reinforced polymer composites. Similar and dissimilar single lap joints bonded with a modern tough structural adhesive used in the automotive industry, as well as the epoxy resin AR260 (the same resin used in composite fabrication) were tested. It was found that the average failure loads varied significantly with adhesive material strength and adherend stiffness. Furthermore, it was also observed that failure mode has a significant effect in failure load. The jute-based natural fibre composites joints, both hybrid and purely natural, were superior in strength compared to the sisal-based natural composites joints.

中文翻译：

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合成和天然纤维增强聚合物复合材料粘接接头的实验分析

近年来，胶粘接头在汽车工业中的应用显着增加，主要是因为它具有减轻汽车重量、节省燃料和减少排放的潜力。复合材料在制造汽车车身部件以减少车辆质量方面的使用也在不断增加。近来，天然纤维复合材料因其许多吸引人的优点（例如高强度重量比、可持续特性和低成本）而受到汽车行业的广泛关注。然而，关于天然纤维增强聚合物复合粘合剂接头的文献很少，需要进一步研究。本研究的主要目的是评估和比较由合成纤维和天然纤维增强聚合物复合材料制成的粘接接头的机械性能。对使用汽车工业中使用的现代坚韧结构粘合剂以及环氧树脂 AR260（与复合材料制造中使用的树脂相同）粘合的类似和不同的单搭接接头进行了测试。发现平均破坏载荷随粘合剂材料强度和被粘物刚度而显着变化。此外，还观察到失效模式对失效载荷有显着影响。与基于剑麻的天然复合材料接头相比，基于黄麻的天然纤维复合材料接头，无论是混合的还是纯天然的，在强度上都更为优越。对使用汽车工业中使用的现代坚韧结构粘合剂以及环氧树脂 AR260（与复合材料制造中使用的树脂相同）粘合的类似和不同的单搭接接头进行了测试。发现平均破坏载荷随粘合剂材料强度和被粘物刚度而显着变化。此外，还观察到失效模式对失效载荷有显着影响。与基于剑麻的天然复合材料接头相比，基于黄麻的天然纤维复合材料接头，无论是混合的还是纯天然的，在强度上都更为优越。对使用汽车工业中使用的现代坚韧结构粘合剂以及环氧树脂 AR260（与复合材料制造中使用的树脂相同）粘合的类似和不同的单搭接接头进行了测试。发现平均破坏载荷随粘合剂材料强度和被粘物刚度而显着变化。此外，还观察到失效模式对失效载荷有显着影响。与基于剑麻的天然复合材料接头相比，基于黄麻的天然纤维复合材料接头，无论是混合的还是纯天然的，在强度上都更为优越。还观察到失效模式对失效载荷有显着影响。与基于剑麻的天然复合材料接头相比，基于黄麻的天然纤维复合材料接头，无论是混合的还是纯天然的，在强度上都更为优越。还观察到失效模式对失效载荷有显着影响。与基于剑麻的天然复合材料接头相比，基于黄麻的天然纤维复合材料接头，无论是混合的还是纯天然的，在强度上都更为优越。