Rod material

摘要

A rob material includes an elongated matrix made of synthetic resin, a plurality of first elongated textile elements, and a plurality of second elongated textile elements, the first and second elements being embeded within the matrix, parallel to each other along the matrix, each of the first elements being composed of a plurality of yarns braided together, the second elements having a lower breaking elongation rate than said first elements. In such a rod material, the second elements have a substantially complete elasticity, and the first elements have such an elongation rate as to elongate further after the fracture of the second elements. Therefore, the stress-strain curve of the rod material shows a high elastic modulus in the elastic region and a high breaking elongation rate. In other words, the stress-strain behavior is similar to that of steel rods.