In the current paper, the influence of absorbed water amount on fatigue life and some mechanical properties was investigated. The epoxy-10 resin was used as a matrix and glass fiber was used as a reinforced material. Two percentage of glass fiber (25 and 35%) was performed. Woven Roven method was performed to arrange the glass fiber inside the matrix. Two types of solutions were used to immerse the samples which were distilled water and salt water. The experimental results showed the lower amount of absorbed water was observed by using salt water solution compare with distilled water due to that the salt water has higher density compare with the other. On the other hand, when the reinforced material was a large percentage, the absorbed water amount was the big amount due to a big probability of cavities were found. Consequently, when the big amount of glass fiber was used, then higher hardness value was obtained.
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