不同纤维间距复合材料弯曲性能有限元分析

Finite Element Analysis of Bending Performance of Composite with Different Fiber Spacing

利用三维绘图软件建立纤维增强复合材料弯曲试验模型,使用ANSYS Workbench有限元分析平台对建立的复合材料三维模型在1 mm强迫位移作用下的弯曲性能进行模拟分析。复合材料的纤维材料为芳纶1414,基体材料为尼龙6,对比分析了在弯曲载荷作用下3种不同纤维间距复合材料的整体及其组分的弯曲应力与弯曲应变分布情况。结果表明,在1 mm强迫位移作用下,复合材料中的纤维的弯曲应力与基体的弯曲应力差值较大,纤维是承受弯曲载荷的主体,基体作为承受载荷的次体拥有较大的弯曲应变;纤维间距为1 mm的复合材料比纤维间距为2.0 mm的复合材料的弯曲应力减小了11.3%,具有较小的纤维间距的复合材料的弯曲应力较小,在弯曲载荷条件下拥有较好的弯曲性能,为纤维增强复合材料的3D打印成型制备提供了理论指导。

The fiber reinforced composite bending test model was established using 3D drawing software,and the ansys workbench finite element analysis platform was used to simulate and analyze the bending performance of the 3D model of the established composite under 1 mm forced displacement.The material parameters of the fiber and matrix of composite were defined,the bending stress and bending strain distribution of the whole and each part of the three composite with different fiber spacing under bending load were compared and analyzed.The results showed that under the action of 1mm forced displacement,the difference between the bending stress of the fiber and the bending stress of the matrix of the composite was large,and the fiber was the main body that bore the bending load.The matrix as the secondary body that bore the load showed greater bending strain;The bending stress of the composite with fiber spacing of 1 mm reduced by 11.3%compared to the composite with fiber spacing of 2.0 mm.The bending stress of the composite with smaller fiber spacing was smaller and had better bending performance under bending load conditions,which provided theoretical guidance for the 3D printing molding process of fiber reinforced composite.