分子静力学法を用いた異方性異種材界面角部の等価き裂強度の推定

抄録

The stress intensity factor for an interfacial corner, which are compatible with that for a crack, can describe the singular stress field around it. However, due to the difference of the singular order with the angle of a corner and the combination of materials, we cannot compare the stress intensity factors for different singularity orders. In this study, we estimated the fracture toughness of jointed interfacial corners with different opening angles with their stress intensity factors using the molecular statics. The fracture toughness shown by the stress intensity factors exponentially decreased with the increase of singular orders to 0.5 that is the singular order of a crack. This trend is the same in several models with different materials. According to these results, we will show that the fracture toughness at the jointed interfacial corner can be translated to the equivalent stress intensity factors of a crack.