Paper Title
Non Linear Buckling Analysis of Sandwiched Cylindrical Shells

This present work is devoted to Non linear buckling analysis of seven layered sandwiched cylindrical shells. The shell is sandwiched structure consists of main core and two three layer faces. Numerical FEM model for the shell has been made. The calculations have been performed with the use of ANYS APDL code for elastic shell of various dimensions. The linear and non linear analysis of the shells have been performed with the use of FEM. Critical buckling pressure is calculated for a family of seven layered shells subjected to external pressure. The results of these investigations are presented on the graphs. And by adding the stringer along the cylinder shell the critical buckling pressure of shell is calculated and the result unstiffened and stringer stiffened shell is compared. Keywords - Buckling, Stiffeners, Eigen value, Non linear.