2015 年 15 巻 3 号 p. 169-174
In this study, the single fiber composite was used to evaluate the stress transfer between a single fiber and a matrix. Single steel fiber was inserted to the epoxy resin, and the tensile load was applied to the steel fiber. Applied load was varied from 0N to 177N, and then the photoelastic images were taken by a digital CCD camera. On the photoelastic analysis, the stress separation was carried out using an experimental-numerical hybrid method. The boundary conditions for a local finite element model, that is, the tractions along boundaries were inversely determined from photoelastic fringes. After determining the boundary conditions for the local finite element model, the stresses could be obtained by finite element direct analysis. The maximum shear stress were placed on the side surface of the steel fiber near the end of fiber, and the maximum normal stress difference was measured near the surface of the end of fiber. The results of stress distribution on the interface between the fiber and the resin indicated that the stress concentration was observed on the middle part of the end of fiber and the side surface near the end of fiber.
