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Inverse estimation of the elastic and anelastic properties of the porous frame of anisotropic open-cell foams
KTH, Skolan för teknikvetenskap (SCI), Farkost och flyg.ORCID-id: 0000-0003-4503-4151
KTH, Skolan för teknikvetenskap (SCI), Farkost och flyg.ORCID-id: 0000-0003-1855-5437
2012 (engelsk)Inngår i: Journal of the Acoustical Society of America, ISSN 0001-4966, E-ISSN 1520-8524, Vol. 132, nr 2, s. 621-629Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

This paper presents a method for simultaneously identifying both the elastic and anelastic properties of the porous frame of anisotropic open-cell foams. The approach is based on an inverse estimation procedure of the complex stiffness matrix of the frame by performing a model fit of a set of transfer functions of a sample of material subjected to compression excitation in vacuo. The material elastic properties are assumed to have orthotropic symmetry and the anelastic properties are described using a fractional-derivative model within the framework of an augmented Hooke's law. The inverse estimation problem is formulated as a numerical optimization procedure and solved using the globally convergent method of moving asymptotes. To show the feasibility of the approach a numerically generated target material is used here as a benchmark. It is shown that the method provides the full frequency-dependent orthotropic complex stiffness matrix within a reasonable degree of accuracy.

sted, utgiver, år, opplag, sider
2012. Vol. 132, nr 2, s. 621-629
Emneord [en]
Anisotropy, Estimation, Numerical methods, Stiffness matrix
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-103779DOI: 10.1121/1.4731222ISI: 000309079200021PubMedID: 22894184Scopus ID: 2-s2.0-84865103489OAI: oai:DiVA.org:kth-103779DiVA, id: diva2:561644
Forskningsfinansiär
TrenOp, Transport Research Environment with Novel Perspectives
Merknad

QC 20121019

Tilgjengelig fra: 2012-10-19 Laget: 2012-10-19 Sist oppdatert: 2024-03-15bibliografisk kontrollert

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Cuenca, JacquesGöransson, Peter

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