Dynamic strength of cylindrical fiberglass shells under multiple explosive loading

We have shown experimentally that, for cylindrical shells made of oriented fiberglass plastic, there exists a critical level of deformations at which the structure sustains a given number of explosions from the inside. The magnitude of the critical deformation depends linearly on the logarithm of the number of loads that cause failure. For a given type of fiberglass, there is a limiting level of explosive action at which the number of loads that do not lead to failure can be rather large (over $\sim$10$^2$). This level is attained under loads that are an order of magnitude lower than the limiting loads under a single explosive action.