Accession Number : AD0458050


Title :   THE EFFECT OF INTERMEDIATE HEAVY FRAMES ON THE ELASTIC GENERAL-INSTABILITY STRENGTH OF RING-STIFFENED CYLINDERS UNDER EXTERNAL HYDROSTATIC PRESSURE


Descriptive Note : Final rept.


Corporate Author : DAVID TAYLOR MODEL BASIN WASHINGTON DC


Personal Author(s) : Blumenberg, William F


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/458050.pdf


Report Date : Feb 1965


Pagination or Media Count : 36


Abstract : Twenty-four machined models were collapsed under external hydrostatic pressure to evaluate the effect of intermediate heavy frames on the elastic general-instability strength of ringstiffened cylinders. The models were designed with various overall lengths, heavy-frame spacings, and heavy-frame sizes; the cylinder diameter, the shell thickness, and the typicalstiffener size and spacing were held constant. The test results indicate that the effectiveness of a particular size of intermediate heavy frame decreases as the cylinder is lengthened at least to six diameters and also that the minimum size of heavy frames necessary to localize the failure between the heavy frames is possibly not dependent upon their spacing. The values predicted by available analytical solutions show poor agreement with experimental results, whereas an existing empirical heavy-frame formula and a formula presented herein show better correlation.


Descriptors :   *STIFFENED CYLINDERS , *SUBMARINE HULLS , *HYDROSTATIC PRESSURE , STRESSES , THICKNESS , STABILITY , BUCKLING , MODEL TESTS , ELASTIC PROPERTIES , TEST METHODS


Subject Categories : Submarine Engineering
      Mechanics
      Fluid Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE