Voids are inevitably formed as a by-product during manufacturing processes of composite materials and affect many of its mechanical properties including the transverse shear modulus. Although several analytical and empirical models are available for transverse shear modulus, they are based on simple assumptions, and none of them consider the effect of voids. In this work, we estimate transverse shear modulus through a finite element model that uses multiple-cells and three-dimensional analysis. The effect of voids on the transverse shear modulus is studied through a design of experiment approach via three primary parameters: fiber-to-matrix Young’s moduli ratio, fiber volume fraction, and void volume fraction. The results indicate that for allowable void volume fractions, the transverse shear modulus can decrease by as much as 15%, while the fiber volume fraction is the most dominating factor of the three in influencing its value.

空隙不可避免地在复合材料的制造过程中作为副产物形成，并影响其许多机械性能，包括横向剪切模量。尽管有几种分析和经验模型可用于横向剪切模量，但它们基于简单的假设，而且都没有考虑空隙的影响。在这项工作中，我们通过使用多单元和三维分析的有限元模型来估算横向剪切模量。通过实验方法的设计，通过三个主要参数来研究空隙对横向剪切模量的影响：纤维与基质的杨氏模量比，纤维体积分数和空隙体积分数。结果表明，对于允许的空隙体积分数，横向剪切模量可降低多达15％，