Buckling, a distinguished word appears in the most failure case of the more sensitive
applications such as cylinder. Buckling analysis presents the most important once in
which huge helpful information (the failure modes, types of failure, and critical failure
load respectively) must be taken in the considerations in the design of any structure.
In this paper, buckling analysis was done on stiffened composite cylindrical shell to
obtain the critical load and modes of failure under different conditions. The
mathematical formulation of the problem was achieved by the ANSYS (Analysis
System) finite element program. Effects of some parameters (fiber orientation, skin
thickness, and elastic material properties) were studied. A numerical program includes
all above features written in APDL (Ansys Parametric Design Language) was
achieved.