Three-Dimensional Printed Kevlar/Glass Fiber-Reinforced Nylon Structures with Various Fiber Orientations Exhibit Mechanical Properties Under Varying Temperatures

Three-dimensional (3D) printing offers a new technical possibility to produce function-controlled composites reinforced with continuous fibers with variable fiber content. The constitutive model of 3D-printed continuous fiber composites reinforced with different fiber contents serves as a basis for establishing mechanical analysis models and functionally tunable composite design methods based on 3D printing. This study aims to analyze the influence of the degree of fiber reinforcement and the orientation of the fibers. The volumetric mean stiffness model and finite element analysis method of 3D-printed composites were created using the material properties of 3D-printed composites with different fiber contents. The mechanical analysis model was used to predict and analyze the properties of composite materials. The finite element model analysis was performed with the ABAQUS tool and compared with simulation and experiment to understand the connection and fiber with the best tensile strength and other mechanical properties. The analysis shows that Kevlar-based fiber-reinforced plastics (FRP) and glass-based FRP have similar properties, which can be attributed to the use of stress–strain curves. However, no stress comparison for different orientations was performed in these studies, which could be a future research area for 3D-printed Kevlar/fiberglass.