Low-velocity impac, resonance, and frequency responses of FG-GPLRC viscoelastic doubly curved panel

2021 ◽  
pp. 114000
Author(s):  
Liang Zhang ◽  
Zhengxian Chen ◽  
Mostafa Habibi ◽  
Aria Ghabussi ◽  
Rayed Alyousef
Keyword(s):  
Low Velocity ◽  
Frequency Responses ◽  
Curved Panel ◽  
Doubly Curved

Dynamic Behavior of FGM Doubly Curved Panel due to Mechanical Loading

2019 ◽  
Vol 950 ◽  
pp. 200-204
Author(s):  
Guang Ping Zou ◽  
Nadiia Dergachova
Keyword(s):  
Mechanical Loading ◽  
Volume Fraction ◽  
Equivalent Stress ◽  
Functionally Graded ◽  
Excitation Mode ◽  
Simply Supported ◽  
Curved Panel ◽  
Von Mises Equivalent Stress ◽  
Von Mises ◽  
Doubly Curved

This study presents the dynamic response analyze of a simply supported and isotropic functionally graded (FG) double curved panel under mechanical loading. The aim of the research was to investigate mechanical behavior in a FGM curved panel due to different excitation mode of dynamic loading. The novelty of this research is an investigation of von Mises equivalent stress distribution in double curved panel due to different excitation mode. Computed results are found to agree well with the results reported in the literature. Moreover, influence of volume fraction of the material is studied.

Low Velocity Impact of Flat and Doubly Curved Polycarbonate Panels

2015 ◽  
Vol 82 (4) ◽  
Author(s):  
G. O. Antoine ◽  
R. C. Batra
Keyword(s):  
Low Velocity Impact ◽  
Initial Slope ◽  
Low Velocity ◽  
Velocity Impact ◽  
Impact Speed ◽  
Damage Initiation ◽  
Finite Element Software ◽  
Curved Panel ◽  
Panel Thickness ◽  
The Impact

Three-dimensional finite transient deformations of polycarbonate (PC) panels impacted at low velocity by a hemispherical-nosed rigid cylinder have been studied by using the commercial finite element software ls-dyna with a thermo–elasto–viscoplastic material model for the PC incorporated in it as a user defined subroutine. The implementation of the subroutine has been verified by comparing analytical and numerical solutions of simple initial-boundary-value problems. The mathematical model of the low velocity impact problem has been validated by comparing the computed and the experimental results for the maximum deflection and time histories of the centroidal deflection. It is found that the initial slope of the reaction force between the impactor and the panel versus the indentation for a curved panel can be nearly 20 times that for the flat panel of the same thickness as the curved panel. For the impact velocities considered, it is found that the maximum effective plastic strain in the PC shell near the center of impact and the dominant deformation mode there strongly depend on the panel curvature, the panel thickness, and the impact speed. Effects of the panel curvature, the panel thickness, and the impact speed on stresses and strains developed in a panel are delineated. This information should help designers of impact resistant transparent panels such as an airplane canopy, automobile windshield, and goggles. However, damage initiation and propagation, and the final indentation induced in the clamped panels have not been computed.

Effects of in-plane constraints on the free vibration of a symmetrically laminated doubly curved panel

2003 ◽  
Vol 166 (1-4) ◽  
pp. 89-102 ◽  
Author(s):  
J. W. Shi ◽  
A. Nakatani ◽  
H. Kitagawa
Keyword(s):  
Free Vibration ◽  
Curved Panel ◽  
Doubly Curved
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