抄録
The deformation of unidirectional glass fiber reinforced plastic materials at the wedge indentation was studied by means of photoelastic method. The experimental results indicate that the photoelastic fringe was strongly affected by the inclination angle of yarn, while not affected by the shape of wedge indenter in the range of small indenting depth. Matrix and yarn have some residual stress which is caused during the cure of the specimen. It is natural to consider that the residual stress in the specimen strongly affects the shapes of photoelastic fringe. Such residual stress was taken into consideration in the theoretical analysis of the behavior of wedge indentation of FRP. Both isotropic and orthotropic cases were calculated under two dimensional plane stress condition. The results of theoretical analysis have a good agreement with the experimental results.
