Algorithm Development and Design of Lattice Conical Shell Under Mechanical and Thermal Loads

Subject Areas : optimization and simulation

Behrooz Shahriari ^{1 *} , Mahdi Sharifi ² , Hassan Izanlo ³

1 - Faculty of Mechanics, Malek Ashtar University of Technology, Iran
2 - Faculty of Mechanics, Malek Ashtar University of Technology, Iran
3 - Faculty of Mechanics, Malek Ashtar University of Technology, Iran

Received: 2024-01-30 Accepted : 2024-08-19 Published : 2025-01-19

Keywords: Design, Finite Element Method (FEM), Generative Algorithm, Lattice conical Shell,

Abstract :

In this study, the development of a generative algorithm related to the lattice conical shell (Isogrid pattern) and the modeling of the stiffened shell under mechanical and thermal loads are discussed. An algorithm has been developed for the lattice conical shell (MATLAB software), which generates the pattern of stiffeners on the conical shell. Modeling of the lattice conical shell is done in SolidWorks software. The structure of stiffened shell is analyzed under loading using the Finite Element Method (FEM) in the ANSYS Workbench. The modeling of the lattice conical shell is investigated under mechanical (axial and bending load and internal pressure) and thermal loads. It is concluded that the stiffeners can resist buckling and mechanical failure under mechanical and thermal loading conditions, while the mass is significantly reduced. This shell can be used in various industries due to its lightweight and high resistance. Whereas the safety factor of the final model is about 2 and the model is acceptable for desirable internal pressure (0.6 MPa), the total system mass is about 41 kg.

References:

[1] Kim, T. D., Fabrication and Testing of Composite Isogrid Stiffened Cylinder, Composite Structures, Vol. 45, No. 1, 1999, pp. 1-6.
[2] G. Rahimi, G., Zandi, M., and Rasouli, S., Analysis of the Effect of Stiffener Profile on Buckling Strength in Composite Isogrid Stiffened Shell Under Axial Loading, Aerospace Science and Technology, Vol. 24, No. 1, 2013, pp. 198-203.
[3] Totaro, G., Local Buckling Modelling of Isogrid and Anisogrid Lattice Cylindrical Shells with Triangular Cells, Composite Structures, Vol. 94, No. 2, 2012, pp. 446-452.
[4] Jam, J. E., Noorabadi, M., Taghavian, H., and Namdaran, N., Design of Anis Grid Composite Lattice Conical Shell Structures, Researches and Applications in Mechanical Engineering, Vol. 1, No. 1, 2012, pp. 5-12.
[5] Kim, T. D., Fabrication and Testing of Thin Composite Isogrid Stiffened Panel, Composite Structures, Vol. 49, No. 1, 2000, pp. 21-25.
[6] Sorrentino, L., Marchetti, M., Bellini, C., Delfini, A., and Del Sette, F., Manufacture of High Performance Isogrid Structure by Robotic Filament Winding, Composite Structures, Vol. 164, 2017, pp. 43-50.
[7] Belardi, V. G., Fanelli, P., and Vivio, F., Design, Analysis and Optimization of Anisogrid Composite Lattice Conical Shells, Composites Part B: Engineering, Vol. 150, 2018, pp. 184-195.
[8] Hao, M., Hu, Y., Wang, B., and Liu, S., Mechanical Behavior of Natural Fiber-Based Isogrid Lattice Cylinder, Composite Structures, Vol. 176, 2017, pp. 117-123.
[9] Akl, W., El-Sabbagh, A., and Baz, A., Optimization of the Static and Dynamic Characteristics of Plates with Isogrid Stiffeners, Finite Elements in Analysis and Design, Vol. 44, No. 8, 2008, pp. 513-523.
[10] Li, M., Lai, C., Zheng, Q., Han, B., Wu, H., and Fan, H., Design and Mechanical Properties of Hierarchical Isogrid Structures Validated by 3D Printing Technique, Materials & Design, Vol. 168, 2019, pp. 107664.
[11] Totaro, G., Optimal Design Concepts for Flat Isogrid and Anisogrid Lattice Panels Longitudinally Compressed, Composite Structures, Vol. 129, 2015, pp. 101-110.