FEM analysis of dispersive elastic waves in three-layered composite plates with high contrast properties

被引:8
作者
Zupancic, Barbara [1 ,2 ]
Prokop, Yulia [3 ]
Nikonov, Anatolij [4 ]
机构
[1] Univ Novo Mesto, Fac Mech Engn, Na Loko 2, Novo Mesto 8000, Slovenia
[2] Natl Inst Chem, Hajdrihova 19, Ljubljana 1000, Slovenia
[3] OS Popov Odessa Natl Acad Telecommun, Kuznechna Str 1, UA-65029 Odessa, Ukraine
[4] Fac Ind Engn Novo Mesto, Segova Ul 112, Novo Mesto 8000, Slovenia
关键词
Layered composite plate; Contrast properties; Elastic waves; Rayleigh-Lamb dispersion; Cut-off frequency; Modal FEM analysis; FREE-VIBRATION; LAMINATED COMPOSITE; NATURAL FREQUENCIES; SANDWICH PLATES; LAMB WAVES; DAMAGE; ELEMENT; SIMULATION; MODE; PROPAGATION;
D O I
10.1016/j.finel.2021.103553
中图分类号
O29 [应用数学];
学科分类号
070104 ;
摘要
The limitations of the dynamic theories for the thin layered elastic structures, which very often have different physical and geometrical contrast properties of the layers in today's high-tech applications, bring a number of challenges in the numerical computation of the dynamic response. This is a strong motivation to develop a suitable computational methodology for accurate evaluation and implementation of the numerical results, aiming at accurate interpretation of the vibration spectra and the associated displacement and stress fields. In this paper, a newly developed numerical engineering approach is presented for the study of elastic wave dispersion in composite plates (sandwich plates) with high-contrast properties of the layers using modal finite element method (FEM) analysis implemented in commercial software. The obtained results are compared with the iterative numerical solution of the Rayleigh-Lamb dispersion equation for the fundamental flexural wave and the first shear harmonic. It is shown that the complexity of the dispersion phenomena, including the cut-off frequencies of higher order vibrational modes, has been captured very accurately and that the developed computational methodology provides a valuable insight into the frequency range in which the respective mode can be activated. This perspective shows a great potential of the approach to be employed in many engineering applications involving multi-layered structures with arbitrary number of layers.
引用
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页数:9
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