The article is devoted to analyzing the dispersion properties of waves in structurally inhomogeneous materials such as foam. In analyzing the change of the wave propagation speeds in foam materials, the apparatus of the Cosserat was used. This approach allows us to account for the influence of shear-rotation deformations and analyze the dispersion properties of waves. Numerical calculations have been performed in the case of closed-cells polymer foam. The article shows that the dispersion properties characteristic of shear and rotation waves can be involved in defining the parameters of the Cosserat continuum, which are not easy to decide on in experimental studies. Analytical studies allow not only to obtain the values of the corresponding speeds of shear-rotation waves but also to clarify the directions of empirical studies. Also, the obtained results make it possible to determine the optimal characteristics of foamed materials by studying the effect of changing each of the mechanical characteristics on the change in the shear-rotation rates of the material. The proposed analytical approach can also be used to clarify the methods and parameters of experimental studies of determining shear-rotational wave speeds.
Dispersion Properties of Waves in Polyurethane Foam
Lect.Notes Mechanical Engineering
Design, Simulation, Manufacturing: The Innovation Exchange ; 2023 ; High Tatras, Slovakia June 06, 2023 - June 09, 2023
2023-05-23
7 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Tema Archiv | 2001
|RESIN PREMIX, POLYURETHANE FOAM AND METHOD FOR PRODUCING POLYURETHANE FOAM
Europäisches Patentamt | 2019
|Kraftfahrwesen | 2001
|NTRS | 1985
|