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Mechanics of Composite Materials

, Volume 55, Issue 4, pp 421–434 | Cite as

Steady-State Creep of Metal-Composite Sandwich Panels with Thin Reinforced Bearing Layers

  • A. P. YankovskiiEmail author
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The problem of steady-state creep is formulated for bent metal-composite sandwich panels with thin reinforced bearing layers. The weakened resistance of their core to the transverse shear is taken into account within the framework of the kinematic hypothesis of independent rotation of the straight normal. The problem is linearized by the method of secant modulus. The mechanical behavior of rectangular elongated three-layer plates with a weak honeycomb core in cylindrical bending is investigated. An analysis of dependence of flexibility of such structures on the reinforcement parameters of bearing layers is carried out. It is found that, at different values of the reinforcement parameters (angles and densities), two different deformation “mechanisms” can be realized in the sandwich panel: “classical” (bending dominates) and “nonclassical” (transverse shear dominates). When the classical mechanism is realized, the flexibility of the plate greatly depends on the variation of reinforcement parameters of the bearing layers. But in the nonclassical mechanism, the flexibility practically does not depend on the reinforcement structure. It is found that the minimum flexibility of the three-layer structure is achieved when the nonclassical mechanism of its deformation occurs. In this case, edge effects occur in the vicinity of its supported edges.

Keywords

meta composites three-layer plates reinforced bearing layers steady-state creep weakened resistance to the transverse shear parametric analysis 
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Notes

Acknowledgements

This research was partly carried out within the framework of the Program of Fundamental Scientific Researche of the State Academies of Sciences for 2017–2020 (Project 23.4.1 − Mechanics of deformation and destruction of materials, media, under the action of mechanical loads, the influence of physical fields, and chemically active media).

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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.S. А. Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch of the Russian Academy of SciencesNovosibirskRussia

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