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- Article name
- Modeling of dynamic axisymmetric viscoelastic-plastic deformation of cylindrical composite shells with different reinforcement structures
- Authors
- YANKOVSKII A. P., , lab4nemir@rambler.ru; yankovsky_ap@rambler.ru, Khristianovich Institute of Theoretical and Applied Mechanics the SB RAS, Novosibirsk, Russia
- Keywords
- cylindrical shells / equidistant reinforcement / dynamic loading / viscoelastic-plastic deformation / geometric nonlinearity / Reddy theory / Maxwell-Boltzmann body model / "cross" scheme
- Year
- 2020 Issue 2 Pages 12 - 20
- Code EDN
- Code DOI
- Abstract
- The viscoelastic-plastic and elastoplastic dynamic behavior of relatively thin long circular cylindrical shells from polymer composite materials - epoxy glass-reinforced plastic under the influence of internal pressure of an explosive type is investigated. Shells with circumferential, longitudinal-circumferential and orthogonal-spiral reinforcement structures are considered. A mathematical model of axisymmetric viscoelastic deformation of flexible cylindrical composite shells under the influence of excess pressure is developed. It is shown that at fixed fiber consumption, change in the direction of reinforcement leads to significant change in the magnitude and shape of the residual deflection of the composite shell. With rational reinforcement structures (for example, circumferential or longitudinal-circumferential), the shape of the shell after intense inelastic deformation remains almost cylindrical (with the exception of narrow zones of edge effects). In case of irrational reinforcement structures (for example, spiral ones), after inelastic dynamic deformation, the cylindrical shell takes on a corrugated residual shape. It was shown that the amplitude of the transverse vibrations of the composite shell in the vicinity of the initial time instant significantly exceeds the value of the maximum residual deflection.
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