304 熱強化ガラスのき裂進展解析(OS 材料・構造の動的特性(1))

抄録

The thermally tempered glass has strong resistance for the surface crack, because the residual compressive stress exists near the surface of the glass. However, it also has the residual tensile stress in the center of the glass. Crack propagation of the thermally tempered glass depends on the distribution of the residual stress. We examined the crack velocity of the tempered glass using the Extended Distinct Element Method (EDEM). From numerical results for the normal glass and tempered glass, it is confirmed that the crack velocity depends on the stress gradient.