抄録
Generally, for glass fiber reinforced plastics (GFRP) in acid environments, the relationship between the crack propagation rate da/dt and the stress intensity factor at a crack tip K is expressed experimentally in the form of da/dt=AKm where A and m are constants. In this paper, discussion was focused on the theoretical examination of the constant m. The model of crack propagation due to stress corrosion cracking in GFRP proposed by Hull et al. was modified by taking account of the existence of microcracks on the surface of glass fibers. On the basis of this modified model, a micromechanics study was made. It was possible to obtain the value of m which is appropriate to the experimental value.
