抄録
It is known that the behavior of crack propagation in an internally pressurized tube is much different from that in a flat plate. For example, a sinusoidal crack may propagate in an internally pressurized tube under some conditions. On this phenomenon, experiments were carried out using glass tubes pressurized internally by water, As a result, it has been found out that the velocity of the sinusoidal crack tip is very small comparing with the elastic wave velocity in glass; therefore, the effect of inertia can be ignored in this case, When the crack velocity was not small, no sinusoidal crack was observed.
