Experimental definition of speed of cumulative flow progress through destructable obstacle

A method is described to define the speed of advance of cumulative flow directly in an obstacle. It is found out that this speed, if averaged in time, is less than the speed of explosive detonation, is about ten times less than the sound speed in metal and less than the speed of movement oа detonation products. These results prove the viscouselastic model of obstacle destruction by a cumulative flow.