Eventos Anais de eventos
MECSOL 2022
8th International Symposium on Solid Mechanics
The Finite Element Method applied to the numerical modelling of in-plane and out-of-plane Stress fields in Laminated Composite Reissner-Mindlin Plates
Submission Author:
Marcos Antonio Riquetto Ezequiel , SP
Co-Authors:
Marcos Antonio Riquetto Ezequiel, Carlos Daros
Presenter: Marcos Antonio Riquetto Ezequiel
doi://10.26678/ABCM.MECSOL2022.MSL22-0115
Abstract
A non-linear finite element analysis is considered here for the static modeling of Symmetric Laminated Composite Reissner-Mindlin Plates. Composite Laminated Plates are composed of layers with different fibers' orientations. Such plates can be tailored for specific applications and are used extensively in the aerospace industry. We consider here a geometric nonlinearity for the plate in the form of small strains and moderate rotations (von Kármán nonlinearity). The in-plane stresses for both linear and nonlinear solutions are obtained from the von Kármán strain terms. The interlaminar (out-of-plane) stresses for the linear solution are recovered directly from the linear equilibrium equations. Results are validated e.g. using 3D analytical solutions for full supported plates. Additionally, a revision of available strategies to obtain the interlaminar stresses for the non-linear case is also considered here. Besides shear locking effects that may affect the Reissner-Mindlin Plate Theory, the axial bending coupling, inherent to the geometric nonlinearity, may produce additional membrane locking. Reduced integration will be applied to circumvent all locking effects.
Keywords
nonlinear finite elements method, Laminated composites, Reissner-Mindlin plates, interlaminar stress
