The thermoelastic behavior of glass fiber-reinforced resin matrix composites is very important in several applications such as electronic packaging. Simulation of the composite behavior is complicated because of the complex nature of woven fiber architecture. In this study, we have conducted a numerical simulation of elastic and thermal expansion behavior of woven glass fiber-reinforced resin matrix composite. The simulations were compared to experimental data, showing excellent agreement with elastic properties and fairly good results for the thermal expansion coefficient of the composite.