Accession Number : AD0427232


Title :   THE EFFECT OF FINITE PRESSURE-PULSE DURATION OF THE UNIFORM DEFORMATION OF A LONG CYLINDRICAL SHELL,


Corporate Author : INSTITUTE FOR DEFENSE ANALYSES ARLINGTON VA


Personal Author(s) : Nachbar,William


Report Date : Sep 1963


Pagination or Media Count : 25


Abstract : A long cylindrical shell without end loads or restraints is considered to be loaded uniformly by external pressure applied as a rectangularshaped pulse in time. It is assumed that the shell material is elastic and perfectly plastic, that the material points in the shell move only in the radial direction, and all points on the mid-surface of the shell have the same motion in time. This investigation is directed towards determining the impulse which must be delivered to the shell to cause it to fail. The criterion imposed is that the shell can be said to fail if the nondimensional radial displacement is brought to a prescribed displacement at failure. This value can be attained by applying to the shell a nondimensional pressure, P sub o, over a nondimensional pulse duration time, T. The product of these two values is the impulse at failure. For fixed values of displacement at failure and pulse duration time, the failure impulse is that impulse for which dw/dt0 for 0tt sub f, and dw/dt=0 at t=t sub f. This will be taken henceforth as the definition of impulse at failure. (Author)


Descriptors :   *SHELLS(STRUCTURAL FORMS) , *PRESSURE , DEFORMATION , INCOMPRESSIBLE FLOW , PLASTIC PROPERTIES , FOURIER ANALYSIS , ELASTIC SHELLS , INEQUALITIES , VIBRATION , LOADS(FORCES)


Distribution Statement : APPROVED FOR PUBLIC RELEASE