The THz scanning for the measurement of the density change in strained foams

30th International Conference on Interaction of Intense Energy Fluxes with Matter

Prokhorov, A.E.^1 ; Vshivkov, A.N.^1 ; Kostina, A.A.^1 ; Plekhov, O.A.^1 ; Khemis, S.B.^2 ; Caumes, J.P.^2 ; Batsale, J.C.^3

Institute of Continuous Media Mechanics, Ural Branch, Russian Academy of Sciences, Academician Korolev Street 1, Perm

614013, Russia^1

New TeraHertz Imaging System, Bordeaux Technowest, rue Marcel Issartier 25, Bureau 3, Merignac Cedex, Bordeaux

33702, France^2

Institut de Mecanique et Ingenierie de Bordeaux, Le Departement TREFLE, Esplanade des Arts et Metiers, Talence

33405, France^3

关键词: Deformation process;    Density change;    Mechanical stress;    Polymeric foams;    Terahertz absorption;    THz radiation;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/653/1/012015/pdf
DOI  :  10.1088/1742-6596/653/1/012015

来源: IOP

【 摘 要 】

This paper is devoted to the development of the technique to estimate a distribution of the mechanical stress on the strained specimen based on the data about terahertz absorption. This hypothesis is based on the relation between density of the stressed body and absorption of THz radiation. Using the experimental setup developed by the NeTHIS the authors estimate the stress distribution near the holes with different diameters in stressed polymeric foams. The experimental results are in a good agreement with the numerical simulation of foams deformation process.