The three-dimensional braided composites geometry modeling and the effective elastic modulus prediction

This article focuses on the prediction method of effective elastic modulus of three-dimensional (3D) four-way woven composite materials. Firstly, the elements of 3D four-way woven composite materials are divided into rectangular volume elements, and then the stiffness matrix of the elements is calculated using the material parameters at the Gaussian integration points. Finally, the overall stiffness matrix of the unit is formed by the stiffness matrix of the unit, and then the effective elastic modulus of the 3D four-way woven composite material is predicted. The results indicate that crack length and weaving angle have a significant impact on the effective elastic modulus of woven composite materials.