ディスクリネーションの破壊力学への応用 : 第2報,ディスクリネーションループの離散分布と円形III形き裂

抄録

In the present paper, the relationship between the discrete distribution of circular twist disclination loops and a penny-shaped crack of type IIIis dealt with in connection with the computational treatment of the engineering problem such as the modelling of the defect in terms of the discrete distribution of disclinations. The coplanar equilibrium array of discrete disclination loops is formulated from the viewpoint that the total potential energy of the system containing disclination loops takes the absolute minimum value when all the loops are in stable equilibrium. The pile-up properties such as the equilibrium position and the total number of the loops piled up are investigated and the accuracy of the modelling of a penny-shaped crack of type III by the discrete distribution of disclinations is also evaluated.