铺层方式对碳/环氧管层间剪应力影响的有限元分析

Finite Element Analysis of the Effect of Ply Arrangements on Shearing Stresses for C_f/Epoxy Composite Tubes

利用有限元程序ANSYS7.0对软模膨胀成型制备的碳/环氧管件在轴向载荷下的层间剪应力进行了分析。表明铺层的不对称性会显著导致环向层间剪应力增大,增幅在0.43～1.14倍,但对轴向层间剪应力影响很小;碳/环氧管的轴向铺层和环向铺层的比例对轴向层间剪应力和环向层间剪应力有显著影响,其比例在7∶3～4∶1时可以有效降低碳/环氧管的层间应力。

Finite element software ANSYS7.0 is employed to analyze the interlaminar shearing stresses of Cf/epoxy composite tubes under axial loading. The tubes are fabricated by the flexible expandable mould process. Analysis results show that asymmetry plies increase the hoop interlaminar shearing stresses by 0.43-1.14 times, but no effects on axial interlaminar stresses. The ratio of axial plies to hoop plies plays an important role on the hoop and axial interlaminar shearing stresses, which the stresses reach to a minimum when it's with the range of 7:3-4:1.