Fatigue behavior of Epoxy/ SiO 2 NanocompositesReinforced with E- glass Fiber

Fatigue behavior of Epoxy/ SiO2nanocomposites with different volume fraction of SiO2nano particles (1%,3%,5%,7% and10%) are reported , Atomic force microscopy techniques(AFM) was used with scanning probe microscope to measure the particles size of SiO2nanoparticales.Minimum roughness of the composites was found for composites with 3% vol. fraction of SiO2 nanoparticles. Epoxy/ SiO2nanocomposites were reinforced with 6 layers of chopped mat E-glass fiber and their fatigue behaviourare reported .Fatigue test was carried under rotary bending method and the type of loading was sinusoidal wave with wave ratio R= -1 , and loading frequency 5Hz, which is believed to give a negligible temperature rise during the test.Values of fatigue strength ,fatigue life and fatigue limit of the tested composites from S-N curves are reported .The results show that addition of SiO2nanoparticle enhance the fatigue values however more enhancement was obtained for Epoxy/ SiO2nanocomposite reinforced with 6 layers of chopped mat E-glass fiber .