FIBER BRIDGING ANALYSIS METHOD AND PREDICTION METHOD FOR UNIAXIAL TENSION BEHAVIOR OF FIBER REINFORCED COMPOSITES BASED ON THE FIBER BRIDGING ANALYSIS

摘要

PURPOSE: A fiber cross linkage reading method and a method for estimating the tensile performance of a fiber composite using the same are provided to estimate the tensile performance of the fiber composite using a result of the fiber cross linkage. CONSTITUTION: Those are calculated from the matrix mixed fiber that fiber elasticity coefficient, length of fiber, fiber diameter, fiber tensile strength, fiber content, matrix coefficient of elasticity, matrix tensile strength, matrix content, interfacial friction, coefficient of fiber and matrix, chemical adhesion coefficient, slipping stiffness coefficient, snubbing coefficient, strength reduction factor, probability density function about the fabric center location, probability density function about the fiber oriented direction, and fiber number resistivity correction factor(S210). The stress caused in fiber is calculated according to an angle which inclines to a predetermined crack opening displacement or the buried length of fiber(S230). If the strength is same or bigger than the fiber strength, the stress of the corresponding fiber is zero(S250). If the strength is smaller than the fiber strength, the stress is the stress of the corresponding fiber(S260). The stress of each fiber is numerically integrated and the cross linkage stress of the fiber at the crack opening displacement is produced(S270). The opening edge the upper part is provided for the final opening edge and if it is bigger than the opening edge(S280).