I am modeling (GFRP) reinforced concrete beams. The dilemma facing me is how to model (GFRP) bars as a material in ABAQUS. Is it an (Isotropic) or (Anisotropic) material, and how to get other properties knowing that only tensile test was performed to (GFRP) bars and the results were as follows: - Tensile strength 1250 MPa - Elastic modulus 55000 MPa - Lengthening 2.3%?

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