The single-ply triaxially woven fabric (TWF) constitutes of three sets of inter-woven carbon fiber yarns oriented in 0deg, +60deg and -60deg angles. The fabric is impregnated with epoxy resin to constitute single-ply TWF composite. The material system is utilized in various fields, including space applications due to its low apparent density and high flexibility together with the expected isotropy in stiffness, all of these characteristics resulting from its distinctive configuration. In the present study, the numerical simulation utilizing the beam network model in which yarns that constitute the woven fabric composite are modeled as beams and these beams are connected each other at crossover section of yarns is conducted to analyze the mechanical properties of this material system. The numerical results of the beam network model show good agreement with those of the conventional 3-D solid finite element model.
