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首页> 外文期刊>International Journal of Adhesion & Adhesives >Effect of hygrothermal-mechanical exposure on the residual strength of adhesively bonded joints
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Effect of hygrothermal-mechanical exposure on the residual strength of adhesively bonded joints

机译：湿热机械暴露对粘接接头剩余强度的影响

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摘要

The strength durability of adhesively bonded joints under combined mechanical and hygrothermal environments is crucial for their industrial application. In this study, the strength durability of adhesively bonded aluminium-lithium alloy joints under combined hygrothermal-mechanical conditions was investigated, three loading regimes were applied to the joints and four different hygmthermal conditions were selected. The strength degradation, failure modes, fracture morphology, and adhesive characteristics after exposure were analyzed. The results indicated that hot-humid conditions are the main causes of strength degradation compared to applied loading, however, sustained loading accelerates the rate of degradation, which is more pronounced as the temperature, humidity, loading levels, and exposure cycles increase, especially for the joints to which combined loading is applied. The joint strength degraded by 15.9% without loading application, while it reduced by 19.7%, 19.0%, and 21.8%, respectively, for tensile, bending, and combined sustained loading under temperature cycling from -40 degrees C to 80 degrees C and humidity cycling from 30% to 95%.
机译：粘合的接头在组合机械和湿热环境下的强度耐久性对于其工业应用至关重要。在该研究中，研究了粘合粘结的铝 - 锂合金接头的强度耐久性，在组合的湿热机械条件下，将三个装载制度施加到接头上，选择四种不同的卫生化条件。分析了暴露后的强度降解，失效模式，断裂形态和粘合性特性。结果表明，与施加负载相比，热潮湿条件是强度降解的主要原因，然而，持续加载加速降解速率，这更明显，温度，湿度，装载水平和曝光周期增加，特别是应用组合加载的关节。关节强度降低15.9％而不会加载施用，分别减少19.7％，19.0％和21.8％，用于拉伸，弯曲和在-40℃至80℃和湿度下的温度循环的温度循环循环从30％到95％。

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