Accession Number : AD0681140

Title :   POSTBUCKLING OF AN AXIALLY COMPRESSED OVAL CYLINDRICAL SHELL,

Corporate Author : POLYTECHNIC INST OF BROOKLYN N Y DEPT OF AEROSPACE ENGINEERING AND APPLIED MECHANICS

Personal Author(s) : Kempner,Joseph ; Chen,Youl-Nan

Report Date : NOV 1968

Pagination or Media Count : 42

Abstract : A previous analysis (See AD-635 481 and AD-657 898) of the postbuckling of axially compressed noncircular (oval) cylindrical shells is extended. Additional results showing that, in contrast to the circular cylinder, such a shell may be capable of carrying postbuckling loads substantially higher than its classical buckling load are presented. Furthermore, a perturbation solution, applied to the equations determined from the conditions of stationary total potential energy, yield linear algebraic equations appropriate for the determination of postbuckling characteristics in the initial postbuckling region. It is found that postbuckling load-shortening curves not only exhibit an initial load decrease, but, for the most part, also branch from the bifurcation point towards the third quadrant. Despite the initial drop, these curves also reveal an increase of the load toward the relative maximum load. Furthermore, experimentally determined curves for oval cylinders of Mylar, which exhibit the initial drop, the subsequent rise, and the maximum postbuckling load, are presented. These results are in reasonably good agreement with those determined from the nonlinear theory. (Author)

Descriptors :   (*SHELLS(STRUCTURAL FORMS), BUCKLING), SHELLS(STRUCTURAL FORMS), LOADS(FORCES), STRUCTURAL PROPERTIES, DEFORMATION

Subject Categories : Structural Engineering and Building Technology

Distribution Statement : APPROVED FOR PUBLIC RELEASE