Buckling test of stiffened panels

Evaluation of post-buckling and failure by testing and layerwise models

Conference paper (2022)

Authors

Riccardo Augello Politecnico di Torino
Alfonso Pagani Politecnico di Torino
Erasmo Carrera Politecnico di Torino
D.M.J. Peeters Aerospace Structures & Computational Mechanics - Aerospace Engineering
Research Group
Aerospace Structures & Computational Mechanics (Aerospace Engineering) (TU Delft)
Copyright: © 2022 Riccardo Augello, Alfonso Pagani, Erasmo Carrera, D.M.J. Peeters, Alex Pereira do Prado, Henrique E.A.A. dos Santos, Pedro H.G. Galeb, Pedro H. Cabral
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Published Date

2022

Language

English

Faculty

Aerospace Engineering

Department

Aerospace Structures & Materials

Research Group

Aerospace Structures & Computational Mechanics

Abstract

The present paper deals with the buckling and post-buckling analysis of a multilayered composite reinforced panel. The panel, design 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 effort-required 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 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.