抄録
An analytical verification was conducted concerning the propriety of the method which is called J-integral equivalent Dugdale model here. The present model can be analyzed based on linear elasticity by means of substituting Dugdale model with the same J-integral value for any relation between cohesive force and crack opening displacement in the cohesive force model. Since the cohesive force model is a non-linear elastic one, a load-displacement curve after cracking must agree with a curve which links cracking points for different pre-crack lengths. As the result of the analytical verification, a good agreement between them was obtained considering the errors of Dugdale model analyses.
