借助绘图软件PRO/E建立一种三层三维浅交弯联机织复合材料结构细观模型，并借助大型有限元软件ANSYS对该复合材料的弯曲力学性能进行模拟分析.分别将纤维材料定义为玻璃纤维和碳纤维，树脂基体定义为环氧树脂E51.对比在1 kN的弯曲载荷作用下，两种不同类别纤维作为增强体时的复合材料、纤维增强体和树脂基体的应力、应变分布情况，预测复合材料的破坏形式，并与实验结果定性对比.结果表明，玻纤作为增强体时比碳纤维表现出更大的弯曲应力和弯曲应变，更容易发生破坏；1 kN 弯曲载荷作用下复合材料的破坏形式主要为纤维增强体的变形，树脂基体的碎裂以及纤维增强体和树脂基体间的脱粘.
A new structural model,was built to study the bending properties,with the help of finite element software ANSYS Workbench,of three-dimensional curved shallow-crossing linking woven composites (3D com-posites),using mapping software Pro/Engineer.Material of fibers were defined as E-glass fiber and carbon fiber respectively,resin matrix was defined as epoxy resin E5 1 .The distribution of stress & strain on fibers,resin and 3D composites,as well as the failure mode,was discussed and predicted respectively,under 1 kN bending loads.Simulated result is compared with test result qualitatively.The results show that,the 3D composites with E-glass fiber as fiber-reinforcement present larger stress and strain and damage more easier than the carbon one;the main failure mode of the 3D composites was deformation of fibers,separation between fibers and resin and resin fracture,under 1 kN bending loads.
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