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Continuum Mechanics and Thermodynamics
Erschienen in: Continuum Mechanics and Thermodynamics 4/2021

03.02.2021 | Original Article

Stability of circular micropolar rod with prestressed two-layer coating

verfasst von: Denis N. Sheydakov

Erschienen in: Continuum Mechanics and Thermodynamics | Ausgabe 4/2021

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Abstract

Within the framework of the Cosserat continuum, the stability of a compressed circular rod with a two-layer coating is studied. It is assumed that the coating layers were fixed to each other and attached to the rod after preliminary deformations of axial extension–compression and contain internal stresses. For the physically linear model of a micropolar material, the linearized equilibrium equations are derived, which describes the behavior of the considered composite structure in a perturbed state. By solving them for the rod and coating made of dense polyurethane foam, the critical axial compression is determined for different initial deformations of the layers. According to the results obtained, the preliminary extension of both the outer and inner coating layers stabilizes the deformation of axial compression of the rod, while the effect of their preliminary compression is generally negative. Moreover, with a sufficiently strong initial compression of one of the layers, the buckling of the rod is possible in the absence of its deformation solely due to internal stresses in the coating. Additionally, it was found that the stability of the considered composite structure increases with a decrease in its overall size (scale). This effect is due to the influence of the material microstructure and is not observed in the classical (non-polar) elasticity.
Vorheriger Artikel Free high-frequency vibrations of nonlocally elastic beam with varying cross-section area
Nächster Artikel Cylindrical membrane partially dressed on a rigid body of revolution

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Metadaten
Titel
Stability of circular micropolar rod with prestressed two-layer coating
verfasst von
Denis N. Sheydakov
Publikationsdatum
03.02.2021
Verlag
Springer Berlin Heidelberg
Erschienen in
Continuum Mechanics and Thermodynamics / Ausgabe 4/2021
Print ISSN: 0935-1175
Elektronische ISSN: 1432-0959
DOI
https://doi.org/10.1007/s00161-020-00968-z

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