Dynamic loading of rigid-plastic cylindrical shells

The behaviour of an infinitely long, rigid-plastic cylindrical shell under impulsive loading by a ring of concentrated force and a band of uniform pressure is discussed. The loads are assumed to be greater than the statical collapse values and to act for a short period of time. Numerical results are obtained for rectangular and triangular pulse shapes for the ring of force and for a rectangular pulse shape for a band of uniform pressure. In the final section of the paper, the steady-state motion which would be produced by a constant load greater than the statical value moving along the shell with constant velocity is obtained for the particular cases of a ring of force and a band of uniform pressure.