Eventos Anais de eventos
MECSOL 2022
8th International Symposium on Solid Mechanics
Linear Finite Element Analysis of Interlaminar Stresses in Laminated Composite Timoshenko Beams
Submission Author:
Lucas Mamedes , DF
Co-Authors:
Lucas Mamedes, Carlos Daros
Presenter: Lucas Mamedes
doi://10.26678/ABCM.MECSOL2022.MSL22-0114
Abstract
Composite laminates are applied in various engineering fields, e.g. in aerospace structures in which, numerical simulations are used for testing and optimization. A linear finite element analysis is considered here for the static modeling of laminated Timoshenko beams. The kinematic assumptions of Timoshenko's theory allow an excellent modeling of thick beams. However, the theory assumes that the beam's transversal stresses (vital for assessing the interlaminar stresses on composite beams) are constant in each laminate layer. This assumption is at odds with the expected parabolic form of the stresses. But integration of the equilibrium equations in strong form allows the recovery of the correct stress behavior, provided the finite element has a sufficient degree of continuity. We shall examine a cubic polynomial approximation for finite elements to recover the transversal stress state, aiming at studying the interlaminar failure of laminated composite beams. We have obtained excellent results for the interlaminar stresses, by post-processing the finite element results, via direct integration of the equilibrium equations.
Keywords
Finite Element Method, Timoshenko beam, laminated composite
