Mechanical properties of fiber-reinforced polymer bars under various types of stress-strain state

The object of research is fiber-reinforced polymer bars of a periodic profile with diameters of 4 mm, 6 mm, 8 mm, 10 mm, and 12 mm, manufactured by pultrusion-pulling glass fiber impregnated with a liquid epoxy resin-based binder through a round die. This work aims to study the physical and mechanical characteristics of fiberglass rods used for reinforcement concrete structures.