A parametric modeling method for 2.5D warp-reinforced woven composites considering the extruded distortion of yarns

Abstract

2.5D warp-reinforced woven composites (2.5DWRWC) are widely used in various industries, but it is currently difficult to model parametrically considering the molding effects due to their complex structure. Accordingly, two special parameters (ψ and φ) are introduced to regulate the degree of yarn extrusion, where ψ is used to characterize the extrusion degree of the binder yarn on the weft yarn in the thickness direction, and φ is used to characterize the twisting degree of the warp yarn. On this basis, a parametric modeling method for 2.5DWRWC is constructed by uniting the essential weaving parameters, and the modeling code is written in TexGen software using Python language. Subsequently, the established model is verified experimentally, and the results show that the average comparison error of the geometric parameters is only 5.07 %, the maximum prediction error of the mechanical properties is only 4.78 %, validating the reasonableness of the proposed modeling method. Finally, the effects of the two special parameters on the mechanical properties are emphasized, and the results show that the mechanical properties in weft direction are enhanced with the increase of ψ, and the mechanical properties in warp direction are weakened with the increase of φ. This work can provide guidance for the molding process and mechanical design of 2.5DWRWC, which has significant theoretical value and engineering significance.