湿热环境对树脂预涂的复合材料-钛合金胶接接头强度影响研究

doi:10.19936/j.cnki.2096-8000.20250628.003

摘要/Abstract

摘要： 碳纤维增强聚合物与钛合金之间的粘接结构被广泛应用于飞机结构中,以实现轻量化和足够的强度。本研究对钛合金表面采用酸洗、阳极氧化和一种特殊的树脂预涂覆技术联合处理,以提高胶层/钛合金界面的结合强度,同时为了对比两种接头(无强化处理和树脂预涂处理)经湿热老化后的失效情况,选取80 ℃/95%RH为老化环境,在老化后进行单搭接拉伸试验。结果表明:未老化时,树脂预涂强化接头的强度提升约52.54%;经过30 d的老化,未强化接头抗拉强度下降约20.83%,而经过树脂预涂强化处理的接头抗拉强度下降约30.44%。树脂预涂处理不但增大了钛合金板/胶层界面粘接强度,而且对胶层的内聚强度也起到一定的积极作用,但与未强化接头相比,树脂预涂处理后的接头对环境更敏感。

关键词: 单搭胶接接头, 树脂预涂, 胶层失效, 钛合金, 复合材料

Abstract: The bonding between carbon fiber reinforced polymers and titanium alloys is widely used in aircraft structures to achieve light weight and sufficient strength. In this study, the combination treatment of pickling, anodizing and a special resin pre-coating technology was used to improve the bonding strength of the adhesive layer/titanium alloy interface. At the same time, in order to compare the failure of the 2 joints(no reinforcement treatment and resin pre-coating treatment) after hygrothermal aging, 80 ℃/95%RH was selected as the aging environment, and the tensile test of single lap adhesive bonding was conducted after aging. The results show that the strength of the joint reinforced by resin pre-coating increases by about 52.54% without aging. After 30 days of aging, the tensile strength of the unstrengthened joints decreased by about 20.83%, while the tensile strength of the joint after the resin pre-coating treatment decreased by about 30.44%. Resin pre-coated treatment not only increased the interface bonding strength of titanium alloy plate/adhesive layer, but also played a positive role in the cohesion strength of the adhesive layer. However, compared with the initial joints, the pre-coated resin reinforced joints are more sensitive to the environment.

Key words: single-lap adhesive joint, resin pre-coating, adhesive layer failure, titanium alloy, composite
material

中图分类号:

TB332

郑思民, 赵江铭, 崔九洋, 郑艳萍. 湿热环境对树脂预涂的复合材料-钛合金胶接接头强度影响研究[J]. 复合材料科学与工程, 2025, 0(6): 19-26.

ZHENG Simin, ZHAO Jiangming, CUI Jiuyang, ZHENG Yanping. Study on the effect of hygrothermal environment on the strength of resin pre-coated composite-titanium alloy bonded joint[J]. COMPOSITES SCIENCE AND ENGINEERING, 2025, 0(6): 19-26.

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