Normalised Stiffness Ratios for Mechanical Characterization of Isotropic Acoustic Foams - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of the Acoustical Society of America Année : 2013

Normalised Stiffness Ratios for Mechanical Characterization of Isotropic Acoustic Foams

Résumé

This paper presents a method for the mechanical characterization of isotropic foams at low frequency. The objective of this study is to determine the Young's modulus, the Poisson's ratio, and the loss factor of commercially available foam plates. The method is applied on porous samples having square and circular sections. The main idea of this work is to perform quasi-static compression tests of a single foam sample followed by two juxtaposed samples having the same dimensions. The load and displacement measurements lead to a direct extraction of the elastic constants by means of normalized stiffness and normalized stiffness ratio which depend on Poisson's ratio and shape factor. The normalized stiffness is calculated by the finite element method for different Poisson ratios. The no-slip boundary conditions imposed by the loading rigid plates create interfaces with a complex strain distribution. Beforehand, compression tests were performed by means of a standard tensile machine in order to determine the appropriate pre-compression rate for quasi-static tests.
Fichier non déposé

Dates et versions

hal-02638951 , version 1 (28-05-2020)

Identifiants

Citer

Sohbi Sahraoui, Bruno Brouard, Lazhar Benyahia, Damien Parmentier, Alan Geslain. Normalised Stiffness Ratios for Mechanical Characterization of Isotropic Acoustic Foams. Journal of the Acoustical Society of America, 2013, 134 (6), pp.4624-4629. ⟨10.1121/1.4824833⟩. ⟨hal-02638951⟩
20 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More