Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
ASSESSMENT OF DIFFERENT LOCAL INTERPOLATIONS FOR A GLOBAL-LOCAL SUPERPOSITION 2D FINITE ELEMENT
Submission Author:
André de Lima , SP
Co-Authors:
André de Lima, Alfredo Faria
Presenter: André de Lima
doi://10.26678/ABCM.COBEM2019.COB2019-0936
Abstract
To accurately model a composite laminate structural behavior, a laminate theory must represent the zig-zag shape of the in-plane displacements and assure the continuity of both displacements and transverse stresses. These are named the C0z requirements. Between the models that are able to fulfil the C0z requirements and obtain accurate responses, the global-local superposition theories appear as one of the most promising techniques. In these theories, the displacement field is composed by a global interpolation function, that is defined to the entire thickness of the laminate, and by a local interpolation function that is defined along the thickness of each layer. The elements built above this hypothesis possess a number of degrees of freedom independent of the number of layers, which makes this technique very attractive in computational aspects. The present work presents the assessment of different polynomial expansions for the local interpolations of a 2D finite element to model composite structures based on global-local superposition.
Keywords
beam element, composite material, zig-zag, global-local superposition
