الفهرس 
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Abstract
This study deals with different methods for the production, design, and fabrication of fiber reinforced polymer (FRP) bars with consisting of the matrix material (resin) and the reinforced material (fibers). The industry consists of three phases: The first phase is taking ropes from natural and synthetic fibers available in the local market and studying the tensile strength and elongation before and after applying the matrix on them, and then using glass fibers to produce fiber reinforced polymer (FRP) bars by a rope manufacturing machine by using different rates of twist factor of fibers. In the second phase, fiber reinforced polymer (FRP) bars were produced from synthetic fibers such as glass, nylon, and polypropylene, but by a method of manufacturing fibers in one direction (pultrusion) process by changing ratios of volume fraction (Vf). A microscopic examination of the cross-section and longitudinal sections of the bars was conducted. An improvement in the tensile strength of the bars of the second phase is compared with the first stage. In the third phase, hybrid bars (HFRP) Hybrid fiber reinforced polymer of glass fibers and steel with different diameters and types are reinforced to improve modulus of elasticity properties. A noticeable improvement was observed in the modulus of elasticity over the previous phases. The mechanical properties of the bars are studied, such as the tensile strength, the elastic modulus, the elongation, and the composite density. The pullout test was carried out to measure the bonding strength of bars with different surface treatments with concrete elements.