热固性芳纶织物/环氧树脂支撑管动态特性分析  

Dynamic Characteristics Analysis of Support Booms of Thermal Cured Aramid Fabric/Epoxy Resin

作　　者：顾莉莉[1] 丁海鑫 余建新[2] GU Lili;DING Haixin;YU Jianxin(Shanghai Institute of Satellite Engineering,Shanghai 201109;Center of Analysis,Measurement and Computing,Harbin Institute of Technology,Harbin 150080)

机构地区：[1]上海卫星工程研究所,上海201109 [2]哈尔滨工业大学分析测试与计算中心,哈尔滨150080

出　　处：《宇航材料工艺》2023年第4期81-87,共7页Aerospace Materials & Technology

摘　　要：利用热固性树脂基体在玻璃态转变温度(T_(g))前后表现不同的材料特性,制备了Kevlar29芳纶织物/E51环氧树脂基复合材料和三根充气展开支撑管。给出了芳纶织物增强环氧树脂支撑管制备工艺,其中基体温度采用电阻丝加热控制,管体固化形状采用聚酰亚胺薄膜内胆充气加压方法控制。研究了支撑的折叠和展开特性,当T>T_(g)时卷曲折叠并冷却定型用于储存,然后采用二次加热T>T_(g)和充气加压方法控制展开,最终支撑管形状回复率100%。采用模态分析讨论了温度、树脂含量、织物铺层厚度和充气内压等参数对悬臂状态下支撑管的固有频率影响规律。结果表明:随充气压力增加、树脂含量提高、织物铺层厚度增加、基体温度降低,芳纶织物增强环氧树脂支撑管的固有频率增大。采用曲线拟合方法获得固有频率随充气压力和温度的变化规律,结果可为充气展开支撑管设计提供参考。Utilizing different material properties of thermal cured epoxy matrix before and after the glass transition temperature(T_(g)),Kevlar29 aramid fabric/E51 epoxy resin based composites and three inflatable unfolded support booms were prepared.The fabrication process was illustrated,electrical resistant wire was used to control temperature of thermal cured matrix,and an enclosed Kapton membrane was used for inflatable pressurization to control the final shape of booms.The folding and unfolding characteristics of the support were investigated.The boom was curled and folded when T>T_(g) and then cooled and shaped for storage,and the unfolding process was controlled by secondary heating T>T_(g) and inflatable pressurization method,and the final support tube shape recovery rate was 100%.Modal analysis was used to discuss the effect of parameters such as temperature,resin content,fabric layup thickness and internal pressure of inflation on the natural frequencies of the support boom under cantilever condition.The results show that the natural frequencies of the support tube of the aramid fabric reinforced epoxy resin increase as the inflation pressure increases,the resin content increases,the fabric layup thickness increases,and the substrate temperature decreases.A curve fitting method is used to obtain the variation law of the natural frequencies with the inflation pressure and temperature,and the results can provide reference for the design of the inflatable unfolded support boom.

关 键 词：热固性树脂 芳纶织物 充气结构 模态分析 玻璃态转变温度 

分 类 号：TB33[一般工业技术—材料科学与工程]