Experimental optimization of Al2O3 microparticles ratio in epoxy layered glass fiber to improve tensile fatigue performance.

The mechanical properties of composites produced without additives are limited by the matrix and fibers of constructed material. To increase the mechanical properties, micro or nano size particles can be added to the composite. In this study, A l 2 O 3 particles with a purity of 98% and a size of 0–50 μm were added to the epoxy material in the ratios of 1%, 2%, 3%, 4% and 5% by weight to optimize the parameter in order to enhance the mechanical properties of [110P/163 T/195T]s stacking sequenced woven composites. Tensile fatigue tests were performed with a computer-controlled fatigue test device with a 100 kN load cell, by applying R = 0.1 load ratio, 6 Hz frequency, and sine wave load form. Fatigue tests were conducted at different load levels. As a result, increase between 119%-2441% was observed in the fatigue cycle of micro- A l 2 O 3 reinforced woven composite materials compared to non-particles added epoxy woven composites. The highest damping rate was observed as 57.528 in 1% micro- A l 2 O 3 , and the lowest damping rate was observed as 26.312 in composite with no Al2O3 particles. The micro-structure morphologies of micro-Al2O3 reinforced woven composites were observed by SEM. [ABSTRACT FROM AUTHOR]