面向刚度设计的 GFRP 和 VRB/GFRP 混合层合板应变能密度分布研究

针对 VRB/GFRP混合结构刚度优化设计复杂而耗时这一问题，利用有限元法分析了 GFRP铺层角度和铺层数量、VRB厚度分布形式对两种层合板刚度特性及各组分应变能密度分布的影响规律。研究结果表明，应变能密度越小能表征更好的刚度性能；抗弯与抗凹工况下，采用# （0/90） 铺层角度、增加 GFRP铺层数量以及 VRB采用 0.9-1.8-0.9 mm 的厚度分布形式时，VRB/GFRP层合板各组分的应变能密度分布更加均匀，从而获得更好的刚度性能。

Research on Strain Energy Density Distribution in GFRP and VRB/GFRP Hybrid Laminates for Stiffness Design

The stiffness optimization design for VRB/GFRP hybrid structures is complex and time-consuming. Therefore this paper uses the finite element method to analyze the effects of GFRP ply angle, ply count and VRB thickness distribution on the stiffness characteristics of the two types of laminates and the strain energy density distribution of each component. The research results show that a lower strain energy density correlates with enhanced stiffness performance. Under bending and concave conditions, using the #(0/90) ply angle, increasing the number of GFRP plies, and the VRB adopting a 0.9-1.8-0.9 mm thickness distribution, the strain energy density distribution is more uniform across each component material of the VRB/GFRP laminate, leading to better stiffness performance.