International Science and Technology Journal

Composite Material becomes very important for many applications in modern industry. In composite materials the strength, corrosion resistance and lightness of the structure are considered to be as an important goal. In this paper, manufacturing of glass fiber reinforcement polyester resin was made. The lamina is assumed to be very identical and equivalent mechanical properties through the part models. The mechanical properties of layer are known by the initial failure of layer, which predicted by applying an appropriate test. Failure types are dependent on the loading sequence mechanism and model geometry. Many studies have been completed to determine the failure behaver, and the results showed that the most of failure are on the base of stress applied. This study aims to define the effect of thickness ratio with respect to failure pressure of four six and eight layers angle-ply laminate cylinder by using Finite Element software ANSYS. The variation of failure pressure with different of fiber angles revealed that the eight layers laminate (90/ θ /- θ/90 /90/- θ/ θ /90) have grate failure pressure than 4 and 6 layered cylinder.