The present paper deals with the buckling and post-buckling analysis of a multilayered composite reinforced panel. The panel, designed for aeronautical applications, results in a complex stacking sequence, and the development of a refined model able to describe its geometrical nonlinear behavior is mandatory to avoid the usage of highly computational effortrequired 3D finite elements. The proposed approach is a finite element analysis based on the Carrera Unified Formulation (CUF). Thanks to CUF, a 1D model of the composite panel can be formulated and complicated stress fields within the structure can be evaluated, so that the nonlinear behavior is fully described. A refined Equivalent Single Layer (ESL) technique is employed, making use of Lagrange polynomials for the description of the stacking sequence. The results clearly demonstrate the reliability of this approach, comparing the linearized buckling and nonlinear post-buckling solutions with those from Nastran (1D, 2D and 3D) and experiments

Buckling test of stiffened panels: evaluation of post-buckling and failure by testing and layerwise models / Augello, R.; Pagani, A.; Carrera, E.; Peeters, D.; do Prado, A. P.; Santos, H. E.; Galeb, P. H.; Cabral, P. H.. - (2022). ((Intervento presentato al convegno 20th European Conference on Composite Materials (ECCM20) tenutosi a Lausanne, Switzerland nel 26-30 June 2022.

Buckling test of stiffened panels: evaluation of post-buckling and failure by testing and layerwise models

R. Augello;A. Pagani;E. Carrera;
2022

Abstract

The present paper deals with the buckling and post-buckling analysis of a multilayered composite reinforced panel. The panel, designed for aeronautical applications, results in a complex stacking sequence, and the development of a refined model able to describe its geometrical nonlinear behavior is mandatory to avoid the usage of highly computational effortrequired 3D finite elements. The proposed approach is a finite element analysis based on the Carrera Unified Formulation (CUF). Thanks to CUF, a 1D model of the composite panel can be formulated and complicated stress fields within the structure can be evaluated, so that the nonlinear behavior is fully described. A refined Equivalent Single Layer (ESL) technique is employed, making use of Lagrange polynomials for the description of the stacking sequence. The results clearly demonstrate the reliability of this approach, comparing the linearized buckling and nonlinear post-buckling solutions with those from Nastran (1D, 2D and 3D) and experiments
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11583/2970441