Experimental and numerical vibration correlation of pre-stressed laminated reinforced panel

Experimental and numerical vibration correlation of pre-stressed laminated reinforced panel

H. Cabral, Pedro (EMBRAER)
Carrera, Erasmo (Politecnico di Torino)
dos Santos, Henrique E.A.A. (EMBRAER)
Galeb, Pedro H.G. (EMBRAER)
Pagani, Alfonso (Politecnico di Torino)
Peeters, D.M.J. (TU Delft Aerospace Structures & Computational Mechanics)
Prado, Alex P. (EMBRAER)

2020

This research work deals with the buckling load prediction of reinforced laminated composite panels of aeronautical interest. Being subjected to pure compression, these panels are characterized by stable post-buckling. Thus, the vibration correlation technique (VCT) is utilized herein as an effective nondestructive means to extrapolate critical loads from free vibration measurements. A hierarchical design of experiments, making use of nested multifactors (i.e. panel replicas, test setups, and measurement repetitions), is employed to estimate components of variance. The experimental outcomes are compared with the results of an advanced finite element model with layer-wise kinematics and based on the Carrera Unified Formulation (CUF). The results show that, although obtained with a low number of tests and specimens, the VCT experiments are repeatable and provide a good validation of the numerical simulations, which are demonstrated to be accurate and reliable.

Composite stiffened panel
design of experiments
layerwise models
vibration correlation technique

http://resolver.tudelft.nl/uuid:bea97f90-ff22-4ff8-9d4a-ff4ea1dbbe01

https://doi.org/10.1080/15376494.2020.1853285

2021-12-01

1537-6494

Mechanics of Advanced Materials and Structures, 29 (15), 2165-2175

Institutional Repository

journal article

© 2020 Pedro H. Cabral, Erasmo Carrera, Henrique E.A.A. dos Santos, Pedro H.G. Galeb, Alfonso Pagani, D.M.J. Peeters, Alex P. Prado