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On the free vibration of sandwich panels with a transversely flexible and temperature dependent core material – part II: numerical study

On the free vibration of sandwich panels with a transversely flexible and temperature dependent core material – part II: numerical study
On the free vibration of sandwich panels with a transversely flexible and temperature dependent core material – part II: numerical study
This paper, the second of two, presents a numerical study of a simply-supported sandwich panel that is based on the mathematical formulation that appears in part I. The solution of the unknowns in the case of a simply-supported panel is based on a trigonometric series solution and it converts the set of PDE’s into an algebraic set of equations that are described by stiffness and mass matrices. In addition, it studies numerically, for a specific sandwich panel construction, the effects of the degradation of the mechanical properties of the core as a result of the thermal field on the free vibration response of the two computational models. The results of the mixed formulation model, denoted by MF, and the displacement formulation, denoted by DF, reveal a significant reduction of the eigenfrequencies as well as a shifting of the eigen-modes from higher modes to lower ones with increasing temperature.
sandwich structures, thermal degradation, free vibrations, high-order sandwich theories, vertically compliant core materials
0266-3538
863-869
Frostig, Y.
ba0bb3a4-3ecb-467b-b89f-448ee990db0d
Thomsen, O.T.
f3e60b22-a09f-4d58-90da-d58e37d68047
Frostig, Y.
ba0bb3a4-3ecb-467b-b89f-448ee990db0d
Thomsen, O.T.
f3e60b22-a09f-4d58-90da-d58e37d68047

Frostig, Y. and Thomsen, O.T. (2009) On the free vibration of sandwich panels with a transversely flexible and temperature dependent core material – part II: numerical study. [in special issue: ONR - Dynamic Failure and Durability] Composites Science and Technology, 69 (6), 863-869. (doi:10.1016/j.compscitech.2008.04.013).

Record type: Article

Abstract

This paper, the second of two, presents a numerical study of a simply-supported sandwich panel that is based on the mathematical formulation that appears in part I. The solution of the unknowns in the case of a simply-supported panel is based on a trigonometric series solution and it converts the set of PDE’s into an algebraic set of equations that are described by stiffness and mass matrices. In addition, it studies numerically, for a specific sandwich panel construction, the effects of the degradation of the mechanical properties of the core as a result of the thermal field on the free vibration response of the two computational models. The results of the mixed formulation model, denoted by MF, and the displacement formulation, denoted by DF, reveal a significant reduction of the eigenfrequencies as well as a shifting of the eigen-modes from higher modes to lower ones with increasing temperature.

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More information

Published date: May 2009
Keywords: sandwich structures, thermal degradation, free vibrations, high-order sandwich theories, vertically compliant core materials
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 339095
URI: https://eprints.soton.ac.uk/id/eprint/339095
ISSN: 0266-3538
PURE UUID: 3aeeb342-6bc8-4f79-8ba5-8c9b632d115b

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Date deposited: 23 May 2012 10:21
Last modified: 16 Jul 2019 22:03

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