抄録
Crack in structure can cause collapse of structure. So that preventive measure must be done to stop crack propagation. Stopping hole is one of the crack arrester which is a mechanism which stops crack propagation. Stopping hole can not stop high-speed propagating crack in all cases. So re-propagation condition of crack from stopping hole does not clear up. This study finds out re-propagation condition with high-speed crack propagation experiment. In the experiment, we observed fracture phenomenon at ultra high-speed using C.G.S.methods. We bring out influence between crack propagation and size of stopping hole, and behavior of stop and re-propagation of crack propagation.
