analytical and numerical investigation of parameters effective on energy absorption circular composite tube under internal and axial pressure

in this paper, the energy absorption capacity of stiffened circular composite tube is considered. the governing equations and dynamic equilibrium are first derived and then solved. additionally, a finite element model of reinforced circular composite tube structure is modeled. in the following, the effects of various parameters such as structural geometry, number of rings and stingers on the mechanical behavior of such tubes are considered. the stiffened cylinder is under axial loading and internal pressure, and boundary conditions for both sides of the cylinder are considered as simple supports. results show an increase in the amount of energy in the stingers when the number of stingers rise, and a decrease in the total amount of energy when the number of rings and stringers soar. total strain energy and the strain energy created in structural elements rise by increasing the ratio of radius to thickness. the analytical solution results are in good compatibility with the results achieved from the finite element method.