Stability of Composite Cylindrical Shells with Noncoincident Directions of Layer Reinforcement and Coordinate Lines |
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Authors: | N P Semenyuk V M Trach |
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Institution: | (1) Timoshenko Institute of Mechanics, Ukrainian National Academy of Sciences, Kiev, Ukraine;(2) Ukrainian State Academy of Water Management, Rovno, Ukraine |
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Abstract: | The stability problem is solved for cylindrical shells made of a laminated composite whose directions of layer reinforcement
are not aligned with coordinate axes of the shell midsurface. Each layer of the composite is modeled by an anisotropic material
with one plane of symmetry. The resolving functions of the mixed variant of shell theory are approximated by trigonometric
series satisfying boundary conditions. The stability of the shells under axial compression, external pressure, and torsion
is investigated. A comparison with calculation data obtained within the framework of an orthotropic body model is carried
out. It is shown that this model leads to considerably erroneous critical loads for some structures of the composites.
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Translated from Mekhanika Kompozitnykh Materialov, Vol. 41, No. 5, pp. 651–662, September–October, 2005. |
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Keywords: | composite cylindrical shells stability axial compression external pressure torsion one plane of symmetry |
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