Moisture absorption-desorption effects in adhesive joints
Moisture absorption-desorption effects in adhesive joints
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DOI：
10.1016/j.ijadhadh.2009.05.001
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发表时间：
2009-12-01
影响因子：
3.4
通讯作者：
Crocombe, A. D.
中科院分区：
文献类型：
--
作者：
Mubashar, A.;Ashcroft, I. A.;Crocombe, A. D.
本文研究了单搭接胶接接头的吸放湿效应。进行实验以确定单组分环氧粘合剂FM 73的吸湿率。在接头暴露于不同的调节环境后，对由铝合金2024 T3和0和FM73粘合剂制造的单搭接接头进行拉伸测试。实验结果表明，当在50摄氏度条件下浸泡在水中时，具有2024 T3粘附体的单搭接接头的失效强度随着时间逐渐降低。然而，接头强度几乎完全恢复后，水分解吸。单搭接接头与2024 0粘附显示出下降的强度为28天的调节，之后强度恢复，56天后达到一个平台。再次，强度几乎完全恢复解吸水分。接头的强度恢复，在解吸水分后，表明粘合剂的降解在很大程度上是可逆的。失效表面的分析表明，干燥接头在粘合剂层中发生内聚失效，并且失效路径在调节后向界面移动。在水分解吸后，失效模式恢复为内聚失效。(C)2009爱思唯尔有限公司保留所有权利。
This paper presents a study of moisture absorption-desorption effects in single lap adhesive joints. Experiments were carried out to characterise the moisture uptake of the single part epoxide adhesive, FM73. Tensile testing of single lap joints manufactured from aluminium alloy 2024 T3 and 0 and FM73 adhesive was carried out after the joints were exposed to different conditioning environments. The experimental results revealed that the failure strength of the single lap joints with 2024 T3 adherends progressively degraded with time when conditioned at 50 degrees C, immersed in water. However, the joint strength almost completely recovered after moisture was desorbed. The single lap joints with 2024 0 adherends showed decreased strength for 28 days of conditioning, after which strength recovered, reaching a plateau after 56 days. Again, strength almost completely recovered on desorption of moisture. The strength recovery of the joints, after desorption of moisture, showed that the degradation of the adhesive was largely reversible. Analysis of the failure surfaces revealed that the dry joints failed cohesively in the adhesive layer and that the failure path moved towards the interface after conditioning. The failure mode then reverted back to cohesive failure after moisture desorption. (C) 2009 Elsevier Ltd. All rights reserved.