Transverse Impact of a Damped Plate near a Straight Edge

1995 ◽  
Vol 117 (1) ◽  
pp. 103-108 ◽  
Author(s):  
A. N. Danial ◽  
J. F. Doyle
Keyword(s):  
Finite Element ◽  
Free Edge ◽  
Flexural Wave ◽  
Viscous Damping ◽  
Finite Element Analyses ◽  
Edge Waves ◽  
Transverse Impact ◽  
Reflected Waves ◽  
Simply Supported ◽  
Flexural Wave Propagation

The effects of boundaries on flexural wave propagation in plates with viscous damping are studied through spectral and finite element analyses of incident and reflected waves. The incident wave is generated by point impact and therefore has the complication of being circularly crested. Results show excellent agreement between finite element and spectral solutions for waves—with high and low damping—reflected from simply supported, clamped and free edges. In addition, the possibility of Rayleigh-type free edge waves are investigated.

Flexural Wave Propagation Characteristics of Lattice Sandwich Plates

2013 ◽  
Vol 753-755 ◽  
pp. 857-860 ◽  
Author(s):  
Shu Lang Tao ◽  
Gui Lan Yu ◽  
Zong Jian Yao
Keyword(s):  
Finite Element ◽  
Wave Propagation ◽  
Band Gaps ◽  
Comsol Multiphysics ◽  
Flexural Wave ◽  
Sandwich Plates ◽  
Propagation Characteristics ◽  
Finite Element Software ◽  
Flexural Wave Propagation ◽  
Lattice Pattern

This paper is aimed to study flexural wave propagation characteristics of lattice sandwich plates. Based on Blochs theorem, band structure of flexural wave propagation in the plate is obtained by commercial finite element software Comsol Multiphysics. Meanwhile, frequency response is obtained and its maximum attenuation is exactly corresponding to the band gaps. Finally, effects of lattice pattern on band gaps are introduced.

Analysis of three-layer beams with non-identical layers and semi-rigid connections

1998 ◽  
Vol 25 (2) ◽  
pp. 271-276 ◽  
Author(s):  
Ying H Chui ◽  
David W Barclay
Keyword(s):  
Finite Element ◽  
Explicit Solution ◽  
Point Load ◽  
Finite Element Analyses ◽  
Bending Deformation ◽  
Simply Supported ◽  
Distributed Load ◽  
Rigid Connection ◽  
Layered Beam ◽  
Interlayer Slip

An explicit solution is presented for three-layer beams with non-identical and semi-rigidly connected layers. Exact designer-usable equations for calculating mid-span deflection due to bending deformation and interlayer slip of a simply supported layered beam subjected to a uniformly distributed load and a point load applied at mid-span are also given. Calculated results agree well with the results from finite element analyses and from tests.Key words: layered beam, semi-rigid connection, explicit solution.

EVALUATION OF SIMPLIFIED METHODS OF ESTIMATING BEAM RESPONSES TO IMPACT

2012 ◽  
Vol 12 (03) ◽  
pp. 1250016 ◽  
Author(s):  
Y. YANG ◽  
N. T. K. LAM ◽  
L. ZHANG
Keyword(s):  
Finite Element ◽  
Computer Analysis ◽  
Analytical Study ◽  
Impact Resistance ◽  
Solid Object ◽  
Finite Element Analyses ◽  
Impact Action ◽  
Simply Supported ◽  
Static Resistance ◽  
The Impact

Fundamental principles controlling the deflection behavior of a simply supported beam responding to the impact action of a solid object is revealed in this paper. The significant mitigating effects that the mass of the beam have upon its impact resistant behavior have been illustrated with examples. It is a myth that the static resistance of the beam is indicative of its impact resistance. The important effects of "cushioning" and the higher modes phenomenon have also been identified by the analytical study presented herein. Hand calculations and computer analysis methods are introduced and evaluated by comparison with results obtained from finite element analyses using LS-DYNA.

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