Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Postbuckling Optimization of Laminated Composite Rectangular Plates and Stiffened Panel under Compression using Firefly Algorithm
Submission Author:
Rubem Matimoto Koide , PR
Co-Authors:
Rubem Matimoto Koide, Marco Antonio Luersen, Ana Paula Carvalho da Silva Ferreira, Leticia Mendes de Lima
Presenter: Rubem Matimoto Koide
doi://10.26678/ABCM.COBEM2017.COB17-0623
Abstract
Laminated composite materials have been widely used in applications requiring high strength and stiffness and low weight. Structures made of these materials may also contain reinforcements (like stringers) which further improve their load carrying capacity. One of the criteria for designing these structures relies on the postbuckling regime, where a nonlinear stability analysis is very important for the determination of their behavior. As a way to improve their efficiency, it is also sought to optimize the stacking sequence of their plies. Within this context, this work proposes optimizing laminated composite structures in the postbuckling regime using a discrete version of the firefly algorithm (DFA). In this paper, the DFA is applied to optimize imperfect rectangular flat plates and a curved panel with five reinforcements. The purpose of the optimization is to find the optimum stacking sequence, using discrete ply angles, that maximizes the load in the postbuckling regime (purely geometric nonlinearity) constrained by a prescribed maximum transverse deflection or by a failure criterion. The implementation of the algorithm was made in Python and connected to a finite element model built in the commercial code Abaqus. The results of the optimization are presented and the performance of DFA is discussed.
Keywords
Laminated composites, stiffened panel, postbuckling, Optimization, firefly algorithm
