Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Retrieving Fiber Angle Distribution for Variable Stiffness Laminates for a Buckling Load Problem
Submission Author:
Hugo Quadros , SP
Co-Authors:
José Antonio Hernandes, Hugo Quadros
Presenter: Hugo Quadros
doi://10.26678/ABCM.COBEM2017.COB17-1870
Abstract
A parametrization is presented for retrieving variable stiffness laminates from a lamination parameters distribution considering its buckling performance. The approach adopts the use of Lagrange design elements and interpolation functions in order to define fiber angle distribution along a given domain. A study case considered an optimized variable stiffness plate obtained from a lamination parameters based solution with its critical buckling load maximized. The parametrization approach is applied for post-processing the optimum design and retrieve a lay-up configuration. During post-processing, the proposed approach randomly changes its optimization starting point and assess the laminate critical buckling loads in order to penalize designs that diverge from the optimum design buckling performance. An optimization framework is implemented based on a sequential quadratic programming for obtaining a fiber angle distribution which best match with a given set of optimum lamination parameters. This method, besides reducing drastically the number of design variables, also guarantees that a smooth and continuous fiber angle distribution is achieved at the cost of minimum loss in buckling performance without limiting the design space.
Keywords
variable stiffness design, retrieving fiber angles, lamination parameters
