基于非对称铺层的复合材料弯扭耦合结构设计与试验验证  

DESIGN AND EXPERIMENTAL VERIFICATION OF COMPOSITE BEND-TWIST COUPLED STRUCTURE BASED ON ASYMMETRIC STACKING SEQUENCE

作　　者：崔达 张鸣昊 李道奎[1,3] Cui Da;Zhang Minghao;Li Daokui(College of Aerospace Science and Engineering,National University of Defense Technology,Changsha 410073,China;School of Civil Engineering and Mechanics,Lanzhou University,Lanzhou 730000,China;Hunan Key Laboratory of Intelligent Planning and Simulation for Aerospace Missions,Changsha 410073,China)

机构地区：[1]国防科技大学空天科学学院,长沙410073 [2]兰州大学土木工程与力学学院,兰州730000 [3]空天任务智能规划与仿真湖南省重点实验室,长沙410073

出　　处：《力学学报》2024年第10期2888-2901,共14页Chinese Journal of Theoretical and Applied Mechanics

基　　金：国家自然科学基金(12302197);国防科技大学青年自主创新科学基金(ZK2023-38)资助项目.

摘　　要：复合材料弯扭耦合结构在前掠翼飞机机翼的结构设计中具有重要的应用价值.现有研究主要基于对称铺层复合材料设计弯扭耦合结构,存在设计域窄及耦合效应不足等问题.非对称铺层复合材料有望解决上述问题,但因其易产生固化变形,目前未能在工程实际中得到应用.文章首先引入层合板的几何因子和材料常数,推导了拉剪多耦合效应层合板的湿热稳定解析条件;其次,利用湿热稳定的拉剪多耦合效应层合板构造了变截面弯扭耦合盒型结构模型,并利用遗传算法-序列二次规划(genetic algorithm-sequential quadratic program,GASQP)混合优化算法实现了结构的非对称铺层优化设计,使得结构在不发生固化变形的同时显著提升了耦合效应;然后,对弯扭耦合结构的湿热稳定性和弯扭耦合效应进行了数值仿真验证,并利用Monte Carlo方法进行了耦合效应的鲁棒性分析;最后,设计并完成了弯扭耦合效应的测量试验,验证了理论设计的正确性和可行性.结果表明:当铺层角度满足湿热稳定条件时,非对称弯扭耦合结构不会发生固化变形;非对称铺层设计可以显著提升耦合效应,最大可达90%以上.The composite bend-twist coupled structure has important application value in the structural design of forward-swept wing aircrafts.The existing research mainly design bend-twist coupled structure based on symmetric composite materials,and there are some limitations such as narrow design domain and limited coupling effect.Asymmetric composite could solve the above problems,but because of its curing deformation,it has not been widely applied in engineering.In this paper,geometric factors and material constants of laminates are introduced to derive the analytical conditions of hygro-thermal stability of extension-shearing multi-coupled laminates.Secondly,a bend-twist coupled box structure model was constructed using extension-shearing multi-coupled laminates,and genetic algorithmsequential quadratic program(GA-SQP)was used to complete the asymmetric optimization design of the box structure,which significantly improves the coupling effect of the structure.Then,the hygro-thermal stability and coupling effect of the bend-twist coupled structure is verified by numerical simulation,and its robustness is verified by Monte Carlo method.Finally,the experimental test of the coupling effect of the asymmetric bend-twist coupled structure is designed and completed,and the correctness of the theory is further verified.The results show that the asymmetric bend-twist coupled structure will not undergo curing deformation when the fiber angles meet conditions of hygro-thermal stability,and the introduction of asymmetry can significantly improve the coupling effect of bend-twist coupled structures and maximum increase is above 90%.

关 键 词：湿热稳定 拉剪多耦合效应层合板 弯扭耦合结构 优化设计 试验验证 

分 类 号：TB33[一般工业技术—材料科学与工程] O341[理学—固体力学]