###### Abstract  
The elastic properties of polypropylene (PP) and ultra-high molecular weight polyethylene (UHMWPE) textile composites were predicted using finite element analysis (FEA). A three-dimensional (3D) model of composites was generated by introducing a cloth made from UHMWPE fibers into a PP matrix. Regarding the weaving type, the reinforcement was fabricated by replicating plain and twill-woven materials. Additionally, the elastic properties of the composites were compared and evaluated by varying the volume fraction of UHMWPE in the composites from 45% to 75%. The elastic modulus of the composites containing textiles prepared using the plain weaving method was greater than that of the composites containing textiles prepared using the twill weaving method. Along the axial direction, the shear modulus calculation results for the plain-woven reinforcement textiles were distinct. However, the shear moduli in both directions were similar in the twill-woven reinforcement materials. Moreover, the future development of composites should quantify the simulation by measuring the tensile strength and shear strength of real materials. polyproylene; ultra-high molecular weight polyethylene; plain-woven; twill-woven; composites; volume fraction +
Footnote †: journal: Applied  
high-strength high-modulus polyethylene, is one of the world's high-performance materials at present. Owing to its wide range of good characteristics, such as corrosion resistance, wear resistance, and low density, UHMWPE is currently used in military protective materials, military machinery components, aerospace equipment, and other military industries. Among the high-performance fibers, UHMWPE fiber is second only to polyethylene (PE) and polypropylene (PP) fibers in terms of density, and it is the ideal ballistic fiber material with the lowest density. Thus, it is feasible to improve the bulletproof performance of a material while decreasing its weight to achieve the lightweight effect [2; 3; 4; 5]. Moreover, it may be possible to produce lightweight, high-strength, and high-rigidity components for various sectors by fabricating composites with UHMWPE. Recently, intensive research has been conducted on the development of composites with high strength using UHMWPE fibers [6; 7; 8; 9; 10]. Moreover, several matrix materials for composites have been explored. Among them, PP is the most prevalent. PP is composed of carbon and hydrogen and is a general-purpose resin. PP is a versatile polymer with excellent processing capabilities that can be transformed into films, extrusions, and injection-molded pieces [11]. Furthermore, PP has a high manufacturing volume among all plastics and is a lightweight substance with a specific gravity of 0.9. Consequently, research has been conducted to fabricate composites by combining PP with UHMWPE with the aim of developing high-strength materials [12; 13; 14; 15; 16; 17; 18; 19]. The focus of these studies has been on the development of high-strength UHMWPE/PP composites using UHMWPE fibers or discontinuous fillers. However, there is a drawback to fabricating composites by layering and mixing these fiber-based composites in multiple orientations. It is thought that simple composites can be fabricated by weaving UHMWPE yarns into composite reinforcement materials in the form of textiles to enhance the convenience of the process. However, developing composite fillers with these textiles is highly complicated. Therefore, the elastic properties of composites generated by computational simulation will be predicted, and the results will be used as a fundamental database to develop composites based on UHMWPE textiles. The finite element analysis (FEA) method is a powerful tool for predicting the mechanical and physical properties of fibers and composites using numerical simulation. The primary objective is to obtain accurate models of the geometry of woven textiles while describing their mechanical and physical behavior. Compared with experimental studies, numerical approaches have several benefits.