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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。
The theoretical calculation method for the three-dimensional equivalent elastic modulus of a variety of fiber hybrid multidirectional winding drums is given. The three-dimensional equivalent elastic modulus of glass-carbon fiber hybrid winding drums is calculated by this method. Taking into account the influence of the hybrid effect, this method was modified by introducing the hybrid effect coefficient into consideration of the carbon fiber volume fraction, the mode of laying and the degree of fiber dispersion. The experimental results show that the accuracy of the three-dimensional equivalent elastic modulus predicted by this method is high. Using this method, the complicated fiber-entangled structure is equivalent to a homogeneous single material with anisotropic properties, which greatly reduces the workload of stress analysis.