三维浅交弯联机织复合材料弯曲性能的有限元分析

借助Pro/Engineer绘图软件,建立三维浅交弯联机织复合材料及弯曲压头的结构模型,进行弯曲性能研究。借助ANSYS Workbench有限元软件,探究复合材料在5 mm弯曲位移载荷作用下纤维、树脂和复合材料的应力、应变分布,并对复合材料的破坏模式进行预测。结果表明:三维浅交弯联机织复合材料在弯曲载荷的作用下,试样与上、下压头接触处最容易发生弯曲破坏;三维浅交弯联机织复合材料在承载弯曲载荷时,增强体纤维起到主要承载作用,树脂基体起次要承载作用;在5 mm的弯曲载荷作用下,复合材料的破坏模式主要是树脂的破碎。

Finite Element Analysis of 3D Curved Shallow-Crossing LinkingWoven Composites on Bending Property

A new structural model was built to study the bending properties of three-dimensional curved shallow-
crossing linking woven composites (3D composites) using mapping software Pro/ Engineer. The distribution of stress
& strain on fibers,resin and 3D composites, as well as the failure mode, was discussed and predicted, respectively,
under bending loads of 5 mm displacement using finite element software ANSYS workbench. The results show that un-
der the bending loads the most easily damaging parts of the 3D composites occurred on the point-surface contacts,
where the samples contacted with the up and down pressure heads,the main loads were supported by reinforced fibers
and the minor loads are supported by matrix resin. The main failure mode of the 3D composites is resin fracture under
bending loads of 5 mm displacement.