碳纤维复合材料胶-螺混合双搭接接头的制备及黏结性能
Preparation and bonding properties of bonded-bolted hybrid double-lap joint of carbon fiber composite material
王石1
作者信息
- 1. 中车青岛四方机车车辆股份有限公司,山东 青岛 266000;西南交通大学,四川 成都 611756
- 折叠
摘要
以LJM-180 环氧树脂胶膜、碳纤维复合材料层合板、TC4 钛合金螺栓、钛合金板为原料,通过铺层、涂胶、固化、切割,制备碳纤维复合材料胶-螺混合双搭接接头试件,研究铺层角度及顺序、宽径比、端径比和孔径比对试件黏结性能的影响,并研究了热老化和腐蚀环境对试件黏结性能的影响.结果表明:选择复合材料铺层角度及顺序[45°/0°/-45°/90°]3s、宽径比4.2、端径比2.2、孔径比3.8,试件的失效载荷(M)及连接强度均较高,具有优异的黏结性能;随着宽径比、端径比的增加,试件的M均先增加后趋于稳定,连接强度均逐渐降低;随着孔径比的增加,试件的M及连接强度均呈现先增加后降低的变化趋势;在热空气老化环境中,试件的M随热老化时间的增加而逐渐降低,温度越高,试件M的下降速率越快;在硝酸腐蚀环境中,试件的M随腐蚀时间的增加而逐渐降低,温度越高,试件M的下降速率越快.
Abstract
Using LJM-180 epoxy resin film,carbon fiber composite laminates,TC4 titanium alloy bolts and titanium alloy plates as raw materials,carbon fiber composite material bonded-bolted hybrid double-lap joint specimens were prepared by stack,coating,curing and cutting.The influence of stacking angle and sequence,aspect ratio,end diameter ratio and aperture ratio on the bonding properties of specimens was studied.And the effects of thermal aging and corrosion environment on the bonding prop-erties of specimens were investigated.The results showed that by selecting a composite material stacking angle and sequence of[45 °/0 °/-45 °/90 °]3s,an aspect ratio of 4.2,an end diameter ratio of 2.2 and an aperture ratio of 3.8,the specimens ex-hibited relatively high failure load(M)and connection strength,indicating excellent bonding properties;the M of the specimen first increased and then tended to be stable,but the connection strength gradually decreased as the aspect ratio and end diameter ratio increased;the M and connection strength of the specimen showed a trend of first increasing and then decreasing as the aper-ture ratio increased;the M of the specimen gradually decreased with the increase of thermal aging time in a hot air aging environ-ment,and the higher the temperature,the faster the M of the specimen decreased;and the M of the specimen gradually de-creased with the prolong of corrosion time in a nitric acid corrosion environment,and the higher the temperature was,the faster the M of the specimen decreased.
关键词
碳纤维复合材料/胶-螺混合双搭接接头/失效载荷/黏结性能Key words
carbon fiber composite materials/bonded-bolted hybrid double-lap joint/failure load/bonding properties引用本文复制引用
出版年
2024
NETL
NSTL
万方数据