本文提出了单向短纤维增强复合材材纤维方向模量的一个计算模型。这个模型考虑了横向相邻纤维间以及纵向相接纤维间的相互作用。籍助于这一模型,根据粘弹性对应原理,本文用解析方法计算了单向短纤维增强复合材料的纤维方向复模量,着重分析了端部间隙对复模量的实部和虚部的影响。计算结果和文献中已有的计算结果和试验结果作了比较。 In this paper, a calculation model for the modulus of fiber in unidirectional short fiber reinforced composites is proposed. This model considers the interaction between laterally adjacent fibers and longitudinally connected fibers. Thanks to this model, according to the principle of viscoelasticity, this paper calculates the fiber direction complex modulus of unidirectional short fiber reinforced composites by analytic method, emphasizes the influence of the end gap on the real part and the imaginary part of the complex modulus influences. Computation results and literature have been calculated and test results were compared.