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Inverse estimation of the elastic and anelastic properties of the porous frame of anisotropic open-cell foams
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering.
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering.ORCID iD: 0000-0003-1855-5437
2012 (English)In: Journal of the Acoustical Society of America, ISSN 0001-4966, E-ISSN 1520-8524, Vol. 132, no 2, 621-629 p.Article in journal (Refereed) 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.

Place, publisher, year, edition, pages
2012. Vol. 132, no 2, 621-629 p.
Keyword [en]
Anisotropy, Estimation, Numerical methods, Stiffness matrix
National Category
Applied Mechanics
Identifiers
URN: urn:nbn:se:kth:diva-103779DOI: 10.1121/1.4731222ISI: 000309079200021Scopus ID: 2-s2.0-84865103489OAI: oai:DiVA.org:kth-103779DiVA: diva2:561644
Funder
TrenOp, Transport Research Environment with Novel Perspectives
Note

QC 20121019

Available from: 2012-10-19 Created: 2012-10-19 Last updated: 2017-12-07Bibliographically approved

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Göransson, Peter

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
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Output format
  • html
  • text
  • asciidoc
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