Strength and axisymmetric deformation of laminate cylindrical shells under axial impact

Abstract

The preceding analysis of axisymmetric deformation of cylinderical shells under axial impact has revealed that, with constrained radial mobility of the edge at an end, flexural strains build up most intensely at that end. A description of this process based only on the equations of the nonlinear dynamic edge effect is adequate. A layerwise strength analysis based on the tensor-polynomial criterion, for the many kinds of boundary conditions and over a wide range of loading rates, indicates that the first fracture centers in a shell (when the latter is axisymmetrically deformed) appear within the edge zone. At high loading rates, fracture begins already during the zero-moment deformation stage, and then extends almost simultaneously over large regions along the shell surface, as well as across the shell thickness.