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Characterization models of poroelastic materials: A review
Engineering and Construction
Pages 10 (2510 words)
Characterization Models of Poroelastic Materials: A Review 3.1 Background The analysis, prediction and characterization of the acoustical behaviour and properties of poroelastic materials are of extreme importance in order to enable their appropriate utilization in various industries.
This paper reviews several characterization models of poroelastic materials. Both theoretical and numerical models such as empirical, phenomenological, finite element models, etc. are discussed. The aim is to provide a brief description and review of the various characterization models presently in existence. 3.2 Theoretical Modeling The determination of the sound absorption properties may be differentiated into three kinds, namely – empirical, microstructural and phenomenological models (Bo & Tianning 2009). These are discussed as follows: 3.2.1 Empirical Models One of the first empirical models for determining properties of poroelastics is the one given by Delany and Bazley (1969). This model estimates the impedance of the material assuming that the material is a rigid skeleton (Sagartzazu, Hervella-Nieto, & Pagalday 2008). Other such models also exist that make the same rigid skeleton assumption, and they are also known as equivalent fluid models because according to them, the porous material has high stiffness towards the fluid medium (Sagartzazu, Hervella-Nieto, & Pagalday). Other models also exist that take movements in both, the skeleton and the fluid, into account. ...
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