摘要
讨论温度对T700/3234反对称铺设圆柱壳结构的双稳态特性的影响。通过热压固化成型工艺制备了三种不同铺层层数的试样,采用两点加载的方式,使用在现有的拉伸试验机上改装的实验测试平台驱动反对称铺设圆柱壳结构进行稳态转变,持续捕捉实验过程中的数据,得到在20℃,40℃,60℃和80℃温度下的载荷—位移曲线的变化规律及稳态转变载荷。实验后,通过图像处理技术得到曲率和扭曲率等数据。系统分析稳态转变载荷和稳态曲率变化情况,并对存放时间对壳结构的影响进行了讨论。结果表明,温度对双稳态结构稳态转变影响较大,给出了温度对snap-through和snap-back过程的影响规律。
The temperature effects on the bi-stable characteristics of T700/3234 anti-symmetric carbon-fiber composite structure were studied. Three different layup specimens were prepared through composite molding process. The two points loading method was used in the experiment. The modified experimental testing machine （ the experimental testing machine could be used to induce the bistable composite shell to snap between the two stable shapes, and continually capture the data in the experimental process. ） was related to tensile testing machine at present. The load-displacement curvatures under the temperature of 20 ℃ ,40 ℃ ,60 ℃ and 80 ℃ were given. The snap load was recorded and the photos were taken in the experimental process. After the experiment, the detailed data of curvature and twisting curvature were obtained by image processing technology. The variation law of the coiled-up radius, out-of-plane displacement ,maximum snap-through and snap-back loads were analyzed. The effect on the composite structure was also discussed. The result shows that the thermal effect is vital to the bistable snaps process, and corresponding influence trends to the snap through and snap back process are given.
出处
《航空材料学报》
EI
CAS
CSCD
北大核心
2016年第5期70-76,共7页
Journal of Aeronautical Materials
基金
国家自然科学基金资助项目(51675485
11002126)
浙江省自然科学基金(LY15E050016)
教育部高等学校博士学科点专项科研基金(20123317120003)
中国博士后科学基金(2013M540498
2014M561787)
关键词
碳纤维复合材料
反对称层合壳
双稳态特性
温度场
carbon-fibre composite
antisymmetric layup shell
Bi-stable characteristics
temperature field
