The present work extends the multicoated micromechanical model of Lipinski et al. (2006, “Micromechanical Modeling of an Arbitrary Ellipsoidal Multi-Coated Inclusion,” Philos. Mag., 86(10), pp. 1305–1326) in the quasistatic domain to compute the effective material moduli of a viscoelastic material containing multicoated spherical inclusions displaying elastic or viscoelastic behavior. Losses are taken into account by introducing the frequency-dependent complex stiffness tensors of the viscoelastic matrix and the multicoated inclusions. The advantage of the micromechanical model is that it is applicable to the case of nonspherical multicoated inclusions embedded in anisotropic materials. The numerical simulations indicate that with proper choice of material properties, it is possible to engineer multiphase polymer system to have a high-loss modulus (good energy dissipation characteristics) for a wide range of frequencies without substantially degrading the stiffness of the composite (storage modulus). The numerical analyses show also that with respect to the relative magnitudes of the loss factors and the storage moduli of the matrix, inclusion and coating, the overall properties of the viscoelastic particulate composite are dominated by the properties of the matrices in some frequency ranges. The model can thus be a suitable tool to explore a wide range of microstructures for the design of materials with high capacity to absorb acoustic and vibrational energies.
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e-mail: yao.koutsawa@univ-metz.fr
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April 2009
Research Papers
Multicoating Inhomogeneities Problem for Effective Viscoelastic Properties of Particulate Composite Materials
Yao Koutsawa,
Yao Koutsawa
Laboratoire de Physique et Mécanique des Matériaux, UMR CNRS 7554,
e-mail: yao.koutsawa@univ-metz.fr
Université Paul Verlaine-Metz
, ISGMP Ile du Saulcy, 57045 Metz, France
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Mohammed Cherkaoui,
Mohammed Cherkaoui
Unité Mixte Internationale UMI GT CNRS 2958, Woodruff School of Mechanical Engineering,
Georgia Institute of Technology
, Atlanta, GA 30332-0405
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El Mostafa Daya
El Mostafa Daya
Laboratoire de Physique et Mécanique des Matériaux, UMR CNRS 7554,
Université Paul Verlaine-Metz
, ISGMP Ile du Saulcy, 57045 Metz, France
Search for other works by this author on:
Yao Koutsawa
Laboratoire de Physique et Mécanique des Matériaux, UMR CNRS 7554,
Université Paul Verlaine-Metz
, ISGMP Ile du Saulcy, 57045 Metz, Francee-mail: yao.koutsawa@univ-metz.fr
Mohammed Cherkaoui
Unité Mixte Internationale UMI GT CNRS 2958, Woodruff School of Mechanical Engineering,
Georgia Institute of Technology
, Atlanta, GA 30332-0405
El Mostafa Daya
Laboratoire de Physique et Mécanique des Matériaux, UMR CNRS 7554,
Université Paul Verlaine-Metz
, ISGMP Ile du Saulcy, 57045 Metz, FranceJ. Eng. Mater. Technol. Apr 2009, 131(2): 021012 (11 pages)
Published Online: March 9, 2009
Article history
Received:
October 15, 2007
Revised:
August 8, 2008
Published:
March 9, 2009
Citation
Koutsawa, Y., Cherkaoui, M., and Daya, E. M. (March 9, 2009). "Multicoating Inhomogeneities Problem for Effective Viscoelastic Properties of Particulate Composite Materials." ASME. J. Eng. Mater. Technol. April 2009; 131(2): 021012. https://doi.org/10.1115/1.3086336
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