Abstract

Load bearing capacity analysis of E-glass/epoxy composites reinforced with 3 D integrated multi-cellular weft-knitted spacer fabrics is focused in this paper. Three groups of composite varied in their cross-sectional shapes were prepared via vacuum resin transfer molding. From the experimental three-point bending test, it was found that the structural geometry has significant effect on mechanical performance and energy absorbability of the 3 D composites. Theoretically, based on FEM model, the composites stiffness matrix and Hashin-failure criteria were implemented in a simulated multi-scale model. Good compliance between the experimental and theoretical force-displacement curves suggested good compatibility of the proposed failure-based model.

摘要

本文重点分析了用 3D 集成多孔纬编间隔织物增强的无碱玻璃/环氧树脂复合材料的承载能力。通过真空树脂传递模塑法制备了三组横截面形状不同的复合材料。从实验三点弯曲试验中发现，结构几何形状对 3D 复合材料的力学性能和能量吸收能力有显着影响。理论上，基于 FEM 模型，复合材料刚度矩阵和 Hashin 失效准则在模拟的多尺度模型中实现。实验和理论力-位移曲线之间的良好一致性表明所提出的基于故障的模型具有良好的兼容性。