摘要
分别以静载作用下纤维层合板(FRP)和层压金属复合材料(FML)的强度为目标,对层合板中纤维层的铺层角度进行了优化设计,依据得到的优化结果对两种层合板在不同载荷下的强度性能进行了比较。采用有限元对层合板进行结构分析,结合Tsai-Wu准则和VonMises准则得到层合板的强度失效因子,然后将粒子群优化算法和有限元结合起来实现优化过程。优化结果表明,FML由于Al层的加入使其横方向承载能力加强,相比FRP,FML具备更好的抵抗面内双向拉伸载荷的能力;在受面外集中载荷作用时,FML在4种不同边界条件下的强度性能都优于FRP,并且FML的强度性能更为稳定。
This paper deals with the optimum strength design of fiber reinforced plastic laminate（FRP） and fiber metal laminates（FML） under static loads.The strength behavior of FRP and FML under different loads and different boundary conditions is compared.Finite element analyses are performed to obtain the failure index combing with Tsai-Wu criterion and VonMises criterion,and a technique of applying particle swarm optimization（PSO） integrated with FEM is developed for the optimization.Optimization results show that for in-plane loading,due to the substituting of metal alloy sheet for prepreg layer,the strength behavior in transverse direction is enhanced and FML is of better resistance on biaxial loading.In addition,for out of plane loading,FML exhibits superior strength behavior than FRP and is more stable than FRP in all the boundary conditions investigated.These advantages facilitate the application of FML for primary structures in aerospace industry.
出处
《工程与试验》
2011年第2期4-7,共4页
Engineering and Test
