【摘要】 以茅人杰提出的单向短纤维复合材料的模型为基础，得出单向短纤维复合材料轴向拉伸强度的计算方法．考虑到单向短纤维复合材料的横向拉伸强度、面内剪切强度，利用两对坐标轴间应力转换关系，导出单向纤维复合材料受任意方向拉伸时的应力；由无规高聚物材料分子链主轴和取向方向间夹角θ＝５４°４４′，利用一等价关系，最后导出随机取向短纤维复合材料的拉伸强度表达式．更多还原

【Abstract】 This paper shows a calculation model and a method for predicting the tensile strength of the random distributed short fiber composite.On the basis of Renjie Mao’s model,the longitudinal tensile strength of the aligned short fiber composite is formulated.Considering the transverse tensile strength and in plane shear strength of the unidirectional fiber composite,and the stress transformation relations of two couples of axes,the stress of the unidirectional fiber composite when it is loaded at an arbitrary angle is obtained.With the aid of an equivalence relation,the calculation formulation of the tensile strength of the random short fiber reinforced composite is deduced.更多还原