全炭纤维复合材料蜂窝夹层结构热变形优化设计  

Thermal deformation optimized design of full carbon fiber material sandwich

作　　者：单庆布 张淑杰[1] Shan Qing-bu;Zhang Shu-jie(School of Aerospace Engineering and Applied Mechanics,Tongji University,Shanghai 200082,China)

机构地区：[1]同济大学航空航天与力学学院,上海200082

出　　处：《炭素技术》2018年第5期11-15,共5页Carbon Techniques

摘　　要：针对铝制蜂窝芯材料及炭纤维复合材料的分析,以全炭纤维六边形蜂窝夹层结构为研究对象,以该结构热变形程度为研究目标进行了分析优化,并总结了蜂窝芯高度、蒙皮厚度、蜂窝密度等因素对复合材料蜂窝夹层结构热变形程度的影响。首先,研究了炭纤维层合板、铝蜂窝芯层弹性常数和热膨胀系数的等效计算问题;然后,通过等效方法和FEMAP软件中的铺层模型,分别进行板单元和体单元的建模,计算炭纤维复合材料及铝蜂窝结构的热变形及静力变形;最后,利用二分法趋近最佳解,对计算结果进行总结。分析结果显示:全炭纤维复合材料夹芯结构与传统的蜂窝夹芯结构相比,具有热变形低、比刚度大、比强度高等优点。With the limitation of metal structure in various properties, carbon fiber composites and their derived structures have attracted attention. In this paper, based on the analysis of aluminum honeycomb core and carbon fiber composites, the whole carbon fiber hexagonal honeycomb sandwich structure was taken as the research object, and the thermal deformation degree of this structure was analyzed and optimized. The influences of honeycomb core height, skin thickness and honeycomb density on the thermal deformation level of honeycomb sandwich structure were summarized. First, both the equivalent calculation of the elastic constants and thermal expansion coefficients of carbon fiber laminates and aluminum honeycomb cores were studied. Then, the modeling of plate and body elements was carried out by the equivalent method and the layer model in the FEMAP software, the thermal deformation and static deformation of the carbon fiber composite and aluminum honeycomb structure were calculated. Finally, the thermal deformation and static force deformation of the aluminum honeycomb sandwich plate were calculated. The dichotomy was used to approach the best solution, and the calculation results were summarized. The analysis results show that the sandwich structure of the carbon fiber composite material has the advantage of lower thermal deformation, larger specific stiffness and higher specific strength compared with the traditional honeycomb sandwich structure.

关 键 词：炭纤维/铝蜂窝 蜂窝夹层结构 热变形 

分 类 号：TB333[一般工业技术—材料科学与工程]