Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Dynamic analysis of laminate plates via Carrera Unified Formulation
Submission Author:
Marcelo Leite Ribeiro , SP , Brazil
Co-Authors:
Murilo Sartorato, Ricardo De Medeiros, Antonio Ferreira, Volnei Tita, Marcelo Leite Ribeiro
Presenter: Marcelo Leite Ribeiro
doi://10.26678/ABCM.COBEM2017.COB17-0168
Abstract
The uses of composite materials is increasing over last decades. Composite design offer the advantage of achieving favorable deformation modes through elastic tailoring. In the aerospace industry, interest in the composite structure has been pursued with great intensity because of the high strength-to-weight and stiffness-to-weight properties of composite materials, which are very desirable for aerospace structures. In addition, laminated composite structures can enhance certain characteristics of the structure, such as the coupling properties, by proper arrangement of the stacking sequence of the layers. Thus, the uses of numerical methods for design composite structures has become strategic. Among the numerical methods, finite element method is the most used. Regarding finite element method, high order formulation can improves plate elements performance. This work apply the Carrera's Unified Formulation (CUF) for laminated plates, implemented as a FORTRAN subroutine linked with commercial finite element software ABAQUSTM to simulate free vibration of composite laminate. CUF is a hierarchical formulation, which offers a procedure to obtain refined structural theories that account for variable kinematic description. Rectangular plates made of composite material, resin epoxy and carbon fiber, were submitted to experimental vibration tests. The experimental tests were carried out by using an impact hammer, which excited the structure with pulse signal, and accelerometers, which measured the output data. Typical natural frequencies, mode shapes and Frequency Response Functions (FRFs) are presented for the specimens. The numerical results are compared with experiments showing the improvement of simulation capability using Carrera's high order finite element formulation.
Keywords
Carrera's unified formulation, finite element, Composite Materials, free vibration analysis
