Theoretical prediction of the elastic properties of three-dimensionaland six-directional braided composites
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摘要: 在三维六向编织物纱线运动规律的基础上, 建立了单胞模型, 推导了编织参数之间的数学关系。基于该模型, 采用改进的刚度平均化方法, 导出了三维六向编织复合材料的工程弹性常数, 分析了编织角和纤维体积含量对弹性性能的影响。结果表明, 三维六向编织复合材料具有良好的力学性能, 由于面内纬纱的加入, 使面内的力学性能得到了提高。Abstract: A unit cell model is established on the pattern of the rule of the yarn movement and the relationshipbetween the braiding parameters is deduced. Based on this model , the elastic properties of three-dimensional six-directional (3D & 6D) braided composites were derived with the method of stiffness averaging and the influence of thebraiding angle adn the fiber volume f raction was analyzed. The result s show that the 3D & 6D braided composite hasgood mechanical properties and it s in2plane mechanical performance is improved by joining the in2plane t ransverseyarns.
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