温湿环境反对称铺设圆柱壳结构的双稳态模型与变形调控研究  

Hygrothermal effect on bistable model of anti-symmetric cylindrical shells and deformation control

作　　者：潘豪[1] 柴国钟[1] 张征[1] 王昌明 张焕青 

机构地区：[1]浙江工业大学特种装备制造与先进加工技术教育部/浙江省重点实验室,浙江杭州310014

出　　处：《机电工程》2017年第11期1235-1242,1292,共9页Journal of Mechanical & Electrical Engineering

基　　金：国家自然科学基金资助项目(51675485;11672269);浙江省自然科学基金资助项目(LY15E050016)

摘　　要：针对双稳态复合材料结构在使用过程中会受到周围环境影响的问题,对作为一种新型双稳态复合材料结构的反对称铺设圆柱壳进行了温度和湿度影响下的双稳态模型研究。基于经典层合板理论和最小势能原理,建立了温度和湿度影响的双稳态理论模型,预测了反对称铺设圆柱壳结构的第一稳态扭曲率、第二稳态主曲率和扭曲率在温度和湿度影响下的变化情况。同时,采用有限元软件ABAQUS模拟得到了在不同温湿环境下突变过程(Snap-through过程)的载荷—位移曲线、主曲率和扭曲率变化情况。理论和模拟结果均表明:两个稳态的扭曲率随温度或吸湿率的增加而增加,第二稳态主曲率和稳态转变载荷受吸湿率的影响较小,但受温度的影响较大。此外,验证了一种通过改变温度和吸湿率来调控两个稳态扭曲率的方法的可行性。Aiming at bistable composite structures affected by the variation of the ambient environment,the model of anti-symmetric cylindrical shells as a novel kind of bistable composite structure under the effects of temperature and moisture was investigated. A theoretical model of bistable composite structures under the effects of temperature and moisture was developed on the foundation of the classical lamination theory and the minimum potential energy theory. The first stable twisting curvatures,the second stable main curvatures and twisting curvatures of anti-symmetric cylindrical shells under the effects of temperature and moisture were predicted by the theoretical model. The load-displacement curves in the snap-through process,the main curvatures and twisting curvatures with different temperature and moisture were obtained by the finite element software ABAQUS. According to the results of the theoretical analysis and finite element analysis,the results indicate that the twisting curvatures of anti-symmetric cylindrical shells in two different stable states increase with the temperature or moisture increasing. The main curvatures in the second stable state and snap loads are influenced slightly by the moisture,but influenced significantly with the temperature increasing. Besides,the feasibility of this method that is presented to active control the twisting curvatures in two stable states with the effects of temperature and moisture is validated.

关 键 词：碳纤维复合材料 温湿环境 有限元法 反对称铺设圆柱壳 双稳态特性 

分 类 号：TH123[机械工程—机械设计及理论]