Dynamic Stability of Rotating Composite Shells with Thermoacttve Shape Memory Alloy Fibers

Andrzej Tylikowski

Abstract

In this article the technique of the dynamic stability analysis proposed for the conventional laminated shells is extended to the activated shape memory alloy hybrid cylindrical shells. The thin symmetrically balanced laminated shell contains both the conventional (e.g., graphite or glass) fibers oriented at +ϑ and − ϑ to the shell axis and the activated shape memory alloy fibers axially oriented. Rotary and coupling inertias are neglected. The rotating with a constant angular velocity shell is simply supported at the edge hoops. The effect of returning to the original geometry after a large inelastic deformation is called the shape memory effect. Changing the temperature of the layer we modify the basic mechanical properties such as Young's modulus and the damping coefficient. The purpose of this article is to solve the dynamic stability problem and to answer the question, how does the temperature activation change dynamic stability domains of the shell. Using the standard stability technique leads to the effective sufficient criterion of the dynamic stability. The stability regions as Junctions of angular velocity, the damping coefficient, and properties of shell material are given. The results indicate that the global activation increases the admissible angular velocity both for the glass-epoxy /NiTi-epoxy and graphite-epoxy /NiTi-epoxy hybrid shells
Author Andrzej Tylikowski IPBM
Andrzej Tylikowski,,
- Institute of Machine Design Fundamentals
Journal seriesJournal of Thermal Stresses, ISSN 0149-5739
Issue year1998
Vol21
No3-4
Pages327-339
DOIDOI:10.1080/01495739808956150
URL http://www.tandfonline.com/doi/abs/10.1080/01495739808956150
Score (nominal)20
Publication indicators WoS Impact Factor [Impact Factor WoS]: 2006 = 0.861 (2) - 2007=1.013 (5)
Citation count*9 (2015-04-09)
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