Figure 2.
The images depict three different views of composite materials. The first image shows a cylindrical rod covered in a smooth white material, secured with a black band. The second image features a long, textured black bar, detailed with a grid pattern, indicating its construction method or material composition. The third image displays multiple dark rods standing upright, with wires and additional materials extending from them, indicating ongoing assembly or testing in a workshop environment. Tools and other materials are visible in the background, indicating an active workspace.(a) Fabrication of glass FRP pile, (b) fabricated carbon FRP pile, and (c) 2 × 2 group piles