Abstract
The epoxy reinforcement with glass fibers high flexible coefficient compares anther fibers. The young modulus as a function of water when the immersion the samples in water at a room temperature found that the coefficient of elasticity of samples increases and decreases after four weeks. increase in the fracture strength of all composites because of the existence of fibers that bear most of the shock stress and that the fibers act as a crack stopper the change in energy with the time of exposure to irradiation, which decreases by increasing the time of irradiation and all samples, as well as in the case of immersion in water. The hardness values with composites increasing compared with epoxy pure and the higher values of glass fibers .The values of hardness decreases by increasing the time of irradiation and all samples, as well as in the case of immersion in water.
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