Accession Number : AD0681264

Title :   EXPERIMENTAL INVESTIGATIONS OF THE STABILITY OF CYLINDRICAL SHELLS, SUBJECTED TO EXTERNAL PRESSURE,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Mykhailov,V. V. ; Chystyukhin,V. O.

Report Date : 24 MAY 1968

Pagination or Media Count : 10

Abstract : An original process for manufacturing experimental cylindrical shells is proposed which provides for the perfect geometry and high mechanical properties of specimens, as well as a method and a device for their testing. The shells are produced by condensing a vacuum-evaporated metal (in this experiment it was pure copper) on the highly polished inner surface of a hollow cylinder. The vacuum-chamber set up and the process of coating are described and are illustrated by a schematic diagram, stressing the homogeneous structure, uniform thickness, and high elastic limit of the shells produced. The installation for testing the simply supported shells (80 mm in diameter, 80 mm long, 0.04--0.08 mm well thickness) is also described and its arrangement is sketched. The techniques used in testing are discussed, and the buckling behavior of shells is analyzed. The results of theoretical (by O. V. Pogorelov's method) and experimental investigations of the lower value of the buckling force are presented and compared graphically with each other. They show a fair agreement. The appearance of plastic deformations in shells with wall thickness over 0.09 mm is mentioned, and the discrepancies up to 25--30% between the experimental and theoretical values of the buckling force are indicated. (Author)

Descriptors :   (*CYLINDRICAL BODIES, *STRESSES), MANUFACTURING, VAPOR PLATING, VACUUM APPARATUS, DEFORMATION, BENDING, PLASTIC PROPERTIES, USSR

Subject Categories : Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE