Tensile strength of specimens of coated fabric which had a crack, a bias crack and a circular defect respectively was measured using a uniaxial and using a biaxial tensile tester. Then, uniaxial and biaxial tensile strength figures were compared, and strengths for the three types of defect condition were compared. Further, uniaxial strengths of four types of coated fabric material specimens with cracks were measured, and the anisotropy of tensile strength along warp and filling was investigated. And, relations between crack opening ratio under deformation and stress were measured on the specimen.
