Design and structural analysis of buckling and prestressed modal of an isogrid conical shell under mechanical and thermal loads

Aerospace structures are very important, so it is necessary to design aerospace structures with low weight and high resistance. In this study, the isogrid conical shell has been studied. At first, an algorithm for the isogrid conical shell is developed in MATLAB software. This algorithm generates the pattern of stiffeners (isogrid) on the conical shell. According to the isogrid conical shell plot in MATLAB software, a shell design has been done in SolidWorks software. Then, the isogrid conical shell has been analyzed under mechanical loads (axial and bending load and internal pressure) and temperature gradient in the ANSYS Workbench software using the finite element method (FEM). Buckling, modal, prestressed–modal, deformation and equivalent stress analyzes have been performed on the isogrid conical shell. The total mass of the system is about 41 kg and it is modeled for an optimal internal pressure (0.6 MPa) with safety factor of about 2. It was concluded that the conical shell with isogrid stiffeners under temperature conditions and mechanical loads can reduce the weight and resist buckling and vibration. At the end, the conditions of fixed support and remote–displacement are compared. This shell can be used in aerospace structures.