The article presents an analysis of the damping of sandwich composites, made of PVC foam cores and laminated skins. Damping parameters are investigated using beam test specimens and an impulse technique. Damping modeling is developed using a finite element analysis which evaluated the different energies dissipated in the material directions of the core and the layers of the skins. The results obtained show that this analysis describes fairly well the experimental results. Next, finite element analysis is applied to investigate the influence of different parameters of the core and skins. The finite element analysis considered can be applied to complex shape structures.
Nakra, B.C. (1981). Vibration Control with Viscoelastic Materials , II, The Shock and Vibration Digest, 13: 17-20.
2.
Nakra, B.C. (1984). Vibration Control with Viscoelastic Materials , III, The Shock and Vibration Digest, 16: 17-22.
3.
Vaswani, J., Asnani, N.T. and Nakra, B.C. (1988). Vibration and Damping Analysis of Curved Sandwich Beams with a Viscoelastic Core, Composite Structures, 10: 231-245.
4.
Moser, K. and Lumassegger, M. (1988). Increasing the Damping of Flexural Vibrations of Laminate FPC Structures by Incorporation of Soft Intermediate Plies with Minimum Reduction of Stiffness, Composite Structures, 10: 321-333.
5.
Hajela, P. and Lin, C.Y. (1991). Optimal Design for Viscoelastically Damped Beam Structures, Applied Mechanics Reviews, 44: 96-106.
6.
He, S. and Rao, M.D. (1992). Prediction of Loss Factors of Curved Sandwich Beams, Journal of Sound and Vibration, 159: 101-113.
7.
Rikards, R. (1993). Finite Element Analysis of Vibration and Damping of Laminated Composites, Composite Structures, 24: 193-204.
8.
Bhimaraddi, A. (1995). Sandwich Beams Theory and the Analysis of Constrained Layer Damping, Journal of Sound and Vibration, 179: 591-602.
9.
Meunier, M. and Shenoi, R.A. (2001). Dynamic Analysis of Composite Plates with Damping Modeled Using High-order Shear Deformation Theory, Composite Structures, 54: 243-254.
10.
Plagianakos, T.S. and Saravanos , D.A. (2004). High-order Layerwise Mechanics and Finite Element for the Damped Dynamic Characteristics of Sandwich Composite Beams, International Journal of Solids and Structures, 41: 6853-6871.
11.
Saravanos, D.A. (1993). Analysis of Passive Damping in Thick Composite Structures, AIAA Journal, 31(8): 1503-1510.
12.
Saravanos, D.A. (1994). Integrated Damping Mechanics for Thick Composite Laminates, Journal of Applied Mechanics, 61(2): 375-383.
13.
Berthelot, J.-M. and Sefrani, Y. (2004). Damping Analysis of Unidirectional Glass and Kevlar Fiber Composites, Composites Science and Technology, 64: 1261-1278.
14.
Berthelot, J.-M. (2006). Damping Analysis of Laminated Beams and Plates Using the Ritz Method, Composite Structures, 74: 186-201.
15.
Berthelot, J.-M. (2006). Damping Analysis of Orthotropic Composites with Interleaved Viscoelastic Layers: Modelng, Journal of Composite Materials, 40: 1889-1909.
16.
Berthelot, J.-M. and Sefrani, Y. (2006). Damping Analysis of Orthotropic Composites with Interleaved Viscoelastic Layers: Experimental Investigation and Discussion, Journal of Composite Materials , 40: 1911-1931.
17.
El Mahi, A. , Assarar, M., Sefrani , Y. and Berthelot, J.-M. (2008). Damping Analysis of Orthotropic Composite Materials and Laminates, Composites B: Engineering, 39: 1069-1076.
18.
Berthelot, J.-M. (1999). Composite Materials. Mechanical Behavior and Structural Analysis, Springer, New York.
19.
Berthelot, J.-M. (2005). Matériaux composites. Comportement mécanique et analyse des structures, 4th edn, Tec & Doc, Paris.
20.
Berthelot, J.-M., Assarar, M., Sefrani , Y. and El Mahi , A. (2008). Damping Analysis of Composite Materials and Structures, Composite Structures, 85: 189-204.
21.
Astm E 756-04e1 (2004 ). Standard Test Method for Measuring Vibration Damping Properties of Materials. Book of Standards Volume 04.06, ASTM International , Pennsylvania.
