三维角联锁机织复合材料经纬向剪切性能有限元分析

本文使用三维绘图软件Pro/E 5.0构建出三维浅交弯联机织复合材料在经纬向模型,借助有限元软件ANSYS分别对其施加相同大小的剪切载荷作用,通过数值模拟的方法计算出复合材料及其纤维与树脂组分的剪切应力、应变分布情况。通过对其应力、应变分布情况的分析,探究三维浅交弯联机织复合材料在经纬向剪切载荷作用下的力学行为,并预测其破坏模式。结果表明:复合材料在纬向的剪切性能好于经向;纤维作为主要承载体表现出较大的剪切应力与较小的剪切应变;复合材料在剪切载荷作用下的破坏形式主要为复合材料的倾斜、坍塌及分层、纤维的脆断、树脂的破碎及纤维与树脂间的脱粘。

Finite Element Analysis on Shear Property in Warp and Weft Direction of 3D Angle Interlock Composites

3D curved-shallow crossing-linking composite models in warp and weft directions were established by mapping software Pro/E 5.0.The shear stress and strain distribution of the composite models were investigated with the help of finite element software ANSYS.The mechanical behavior and failure mode of the 3D composite were studied and predicted by analyzing the shear stress and strain distribution under shear load in warp and weft directions.The results showed that 3D composite had better shear property in weft direction than in warp direction.Compared to resin matrix,fiber made the major contribution to subject the shear load,showing larger shear stress and smaller shear strain.Incline,collapse,and delamination occurred in the 3D composite subjected to shear load.In addition,brittle failure of fibers,fracture of resin matrix,and debond between fiber and resin matrix occurred in the 3D composite subjected to shear load at the same time.