Accession Number : AD0621342

Title :   BUCKLING OF UNSTIFFENED CONICAL SHELLS UNDER COMBINED TORSION AND AXIAL COMPRESSION OR TENSION,

Corporate Author : TECHNION - ISRAEL INST OF TECH HAIFA DEPT OF AERONAUTICAL ENGINEERING

Personal Author(s) : Berkovits,A. ; Singer,J.

Report Date : 15 DEC 1964

Pagination or Media Count : 10

Abstract : A method developed previously by the second author is extended to the analysis of the instability of isotropic conical shells under combined torsion and axial compression or tension. The method is based on solution of modified Donnell type stability equations, in the presence of slightly relaxed boundary conditions for the u and v displacements. Typical examples are calculated, and theoretical interaction curves for combined loading are presented and compared with the interaction curve for cylindrical shells. An experimental program was conducted in order to determine the shape of the interaction curves for combined torsion and axial compression of isotropic conical shells. Results of combined loading tests on unstiffened aluminum alloy shells are presented. The results indicate a parabolic interaction function between torsional and compression buckling strength, similar to the empirical interaction function generally obtained for cylinders. This was to be expected in view of the similarity of the theoretical interaction curves for cones and cylinders as presented. (Author)

Descriptors :   (*BUCKLING, SHELLS(STRUCTURAL FORMS)), (*CONICAL BODIES, BUCKLING), (*SHELLS(STRUCTURAL FORMS), BUCKLING), COMPRESSIVE PROPERTIES, STABILITY, LOADS(FORCES), CYLINDRICAL BODIES, ALUMINUM ALLOYS, FUNCTIONS(MATHEMATICS), ISRAEL

Distribution Statement : APPROVED FOR PUBLIC RELEASE