Accession Number : AD0650540

Title :   AN EXPERIMENTAL INVESTIGATION OF THE YIELD STRENGTH OF A MACHINED RING-STIFFENED CYLINDRICAL SHELL (MODEL BR-7M) UNDER HYDROSTATIC PRESSURE,

Corporate Author : DAVID TAYLOR MODEL BASIN WASHINGTON D C STRUCTURAL MECHANICS LAB

Personal Author(s) : Lunchick,Myron E. ; Overby,James A.

Report Date : NOV 1958

Pagination or Media Count : 24

Abstract : The effects of initial imperfections and residual welding and rolling stresses on the yield strength of a stiffened cylinder were investigated by tests of a machined and stress-relieved model, Model BR-7M, identical in geometry and of the same material as a previously tested fabricated model, Model BR-7. The experimental collapse pressure of 1502 psi agreed well with collapse pressures computed from theories which account for the plastic reserve strength. The pressure at which yielding began agreed more closely with that calculated by the maximum-shear-stress or the Hencky-Von Mises criterion than with that calculated by the maximum-principal-stress criterion. The data also indicated that the mathematical form of the deflection function of the shell did not change appreciably in the elastic-plastic range. Comparison of the collapse pressures of the machined and welded models indicated that for the geometry tested the residual welding and rolling stresses do not adversely affect the collapse pressure. (Author)

Descriptors :   (*STIFFENED CYLINDERS, TENSILE PROPERTIES), (*SHELLS(STRUCTURAL FORMS), HYDROSTATIC PRESSURE), RINGS, MACHINING, WELDING, STRESSES, ROLLING(METALLURGY), DEFLECTION, ELASTIC PROPERTIES, PLASTIC PROPERTIES

Subject Categories : Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE