Buckling test of stiffened panels
Modeling and vibrational correlation testing
D.M.J. Peeters (TU Delft - Aerospace Structures & Computational Mechanics)
Alfonso Pagani (Politecnico di Torino)
Riccardo Augello (Politecnico di Torino)
Erasmo Carrera (Politecnico di Torino)
Alex P. do Prado (EMBRAER)
Pedro Higino Cabral (EMBRAER)
Henrique E.A.A. dos Santos (EMBRAER)
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Abstract
Representative stiffened panels are optimized such that multiple buckling modes and failure (using open hole allowables) occur within a range of 10% of the lowest buckling load. This implies the panels cannot be loaded up to the buckling load without risking failure, hence vibrational correlation testing was used to estimate the buckling loads and modes. At the same time, a finite element model was created using the Carrera Unified Formulation. This model was validated using the tests and a good correlation between both was observed. Three panels were manufactured and each panel was put in place for testing twice. Each time a panel was put in place, the test was repeated three times. This allowed us to get a ballpark estimate for the variation due to replicas of the panel, the test set-up and repeating the tests.
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