Title of article :
Minimal Mass and Maximal Buckling Load of Composite Hexagonal-Triangle Grid Structure using FSDT under External Hydrostatic Pressure
Author/Authors :
Soheil Shamaee ، Mahsa Department of Computer Science - Faculty of Mathematical Sciences - University of Kashan , Ghasemi ، Ahmad Reza Composite and Nanocomposite Research Laboratory, Department of Solid Mechanics - Faculty of Mechanical Engineering - University of Kashan
From page :
309
To page :
318
Abstract :
Grid-stiffened composite shells are one of the most important structures in many industries. These structures based on their fabrication method, provide both high strength and light structural weight. In this study, buckling analysis under external hydrostatic pressure is performed to obtain critical buckling pressure and the optimum values of parameters for stiffeners. First-order shear deformation theory (FSDT) based on the Ritz method is used to calculate the critical buckling load of these structures. The effects of shell thickness, angle of helical stiffeners, rib section area, and the stiffeners number into the buckling load are determined. Comparing the calculated buckling load for stiffened and non-stiffened structures shows that stiffeners significantly optimize structural performance. Furthermore, optimization of stiffener parameters is done by Genetic Algorithm. The results show that the introduced structure has the minimum mass. So, the stiffener parameters would be better. According to the results, the optimum dimensions for stiffener buckling load for the optimal stiffener have been increased by about 80% compared to non-stiffened.
Keywords :
Grid stiffeners , Buckling load , Composite shell , Optimization , Genetic algorithm
Journal title :
Mechanics of Advanced Composite Structures
Journal title :
Mechanics of Advanced Composite Structures
Record number :
2749993
Link To Document :
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