Accession Number : AD0665531

Title :   ANALYSIS OF THE BUCKLING PROCESS OF CIRCULAR CYLINDRICAL SHELLS UNDER AXIAL COMPRESSION,

Corporate Author : TORONTO UNIV (ONTARIO) INST FOR AEROSPACE STUDIES

Personal Author(s) : Tennyson,R. C. ; Welles,S. W.

Report Date : FEB 1968

Pagination or Media Count : 53

Abstract : Geometrically 'near-perfect' circular cylindrical photoelastic shells having radius-to-thickness ratios of the order 100 - 440 were tested in pure axial compression. The critical buckling loads were found to agree within 10 - 14% of the classical value, or within a few percent of the reduced buckling load taking into account the clamped end constraint. High speed photographs of the buckling process were obtained using two cameras viewing the change in the 45 deg isoclinics over the entire cylinder's length and over 60% of the cylinder's perimeter. A theoretical analysis of the inception of buckling using Koiter's mode shapes demonstrated that the classical buckling mode was observed in the experiments for the first time. Further investigation of the nonlinear postbuckling mode shapes just after initial buckling predicted the wave forms observed. It was also determined that the shallow shell equations used to describe the large-deflection postbuckling behaviour do not predict isoclinic patterns which are observed in the later stages of buckling. (Author)

Descriptors :   (*CYLINDRICAL BODIES, BUCKLING), (*SHELLS(STRUCTURAL FORMS), BUCKLING), COMPRESSIVE PROPERTIES, STRESSES, PHOTOELASTICITY, LOADS(FORCES), DEFLECTION, EQUATIONS, CANADA

Subject Categories : Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE