考虑混杂效应时纤维混杂缠绕筒三维等效弹性模量的理论估算和试验研究

摘要

给出了多种纤维混杂多向缠绕筒三维等效弹性模量的理论估算方法,应用该方法计算了玻璃-碳纤维混杂缠绕筒的三维等效弹性模量。计及混杂效应的影响,考虑了碳纤维体积分数、铺层方式、纤维分散度等因素,对玻璃-碳纤维混杂缠绕结构,引入混杂效应系数对该方法进行修正。试验结果表明,该方法预测的三维等效弹性模量的精度较高。采用该方法可将复杂的纤维混杂缠绕结构等效为具有各向异性性质的均质单一材料,极大降低了应力分析的工作量。%A method was presented for estimating 3D effective elastic modulus of multidirectional filament-wound hybrid tube.The effective elastic modulus of glass-carbon fibre wound tube was calculated.In order to consider the influence of hybrid effects,the hybrid effect coefficient was introduced.The volume friction of carbon fibre,layered structure,fibre dispersion,etc were considerd for the glass-carbon winding structure.The test results show that effective elastic modulus based on the present method is accurate.The method can greatly reduce the size of problem for stress analysis,because complex structure can be equivalent to homogeneous anisotropic material.