free vibration of sandwich plates and shells by using zig-zag function
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ID: 244894
2009
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Abstract
This paper analyses the free vibration response of sandwich curved and flat panels by introducing the zig-zag function (—1)kζk
(ZZF) in the displacement models of classical and higher order two-dimensional shell theories. The main advantage of ZZF is the introduction of a discontinuity in the first derivative, zig-zag effect, of the displacements distribution with correspondence to the core/faces interfaces. Results including and discarding ZZF are compared. Several values of face-to-core stiffness ratio (FCSR) and geometrical plate/shell parameters have been analyzed. Both fundamental vibration modes and those corresponding to high wave numbers are considered in the analysis. It is concluded that: (1) ZZF is highly recommended in the free vibration analysis of sandwich plates and shells; (2) the use of ZZF makes the error almost independent by FCSR parameter; (3) ZZF is easy to implement and its use should be preferred with respect to other `more cumbersome' refined theories.
| Reference Key |
brischetto2009shockfree
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|---|---|
| Authors | ;S. Brischetto;E. Carrera;L. Demasi |
| Journal | Nano letters |
| Year | 2009 |
| DOI |
10.3233/SAV-2009-0483
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| URL | |
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