INFLUENCE OF ACIDIC AND SALT MEDIA ON THE FATIQUE BEHAVIOR OF COMPOSITE MATERIALS

Abstract

: Fatigue behavior of composite material of woven fiber glass with polyester resin was investigated in 5% HCl (Hydrochloric acid) and salt water has salinity about 3.5% (35 gram/liter) at room temperature. The specimens are immerged in HCl and salt water for different periods of 2, 3 and 4 days then the fatigue test was carried out. The results showed that the Acidic media (HCl) have signification effect on the fatigue life of composite material when it compared with salt water. On the other hand, the fatigue life of test material decreases when the specimens remain in the HCl and salt water to long period, also it can be notice that the strength reduced by about 20 %, 28 % and 50% for 2, 3 and 4 days respectively for the specimens immersed in (HCl). While the strength reduced by about 8%, 20% and 29% for 2, 3 and4 days respectively for the specimens immersed in salt water.