Investigation of the hybridization effect of glass fibers and diboron trioxide epoxy composites on some mechanical properties

Abstract The mechanical behavior was most important in industry, and one way to enhance the mechanical properties involves preparing hybridized epoxy composites. Different additives (glass fiber and B 2 O 3 powder) have various concentrations (0, 5, 10, 20, and 30% wt.) for B 2 O 3 , while glass fibers have a fixed concentration (10% wt.). Hybrid epoxy composites have been manufactured by the hand lay-up method. Mechanical investigations involve tensile tests, impact tests, and hardness tests. According to the results, increasing the boric oxide concentration increased the examined mechanical characteristics (strength, stiffness, strain-at-break, hardness, toughness, and fracture toughness). Hybrid materials with a weight percentage of 20% B 2 O 3 and 10% glass fibers had the best mechanical properties. These findings are most likely due to the reinforcing elements being evenly distributed and scattered, which enhances mechanical characteristics. A slight decrease in the mechanical properties of the composite at 30% weight percentage of B 2 O 3 and 10% glass fibers, which is related to the presence of voids and agglomerations, is thought to be a sign that the material has reached the saturation level of reinforcement and that the mechanical properties of the structure will collapse if more reinforcing materials are added.