Sensitivity of the response of thick cross-ply doubly curved panels to edge clamping

2009 ◽  
Vol 87 (4) ◽  
pp. 293-306 ◽  
Author(s):  
Ahmet Sinan Oktem ◽  
Reaz A. Chaudhuri
Keyword(s):  
Doubly Curved ◽  
Curved Panels

Fourier analysis of thick cross-ply Levy type clamped doubly-curved panels

2007 ◽  
Vol 80 (4) ◽  
pp. 489-503 ◽  
Author(s):  
Ahmet Sinan Oktem ◽  
Reaz A. Chaudhuri
Keyword(s):  
Fourier Analysis ◽  
Doubly Curved ◽  
Curved Panels

Double orthogonal set of solution functions for cross-ply laminated shear flexible cylindrical/doubly curved panels

2003 ◽  
Vol 59 (2) ◽  
pp. 189-198
Author(s):  
Humayun R.H. Kabir ◽  
Abdullateef M. Al-Khaleefi ◽  
Mai Al-Marzouk
Keyword(s):  
Doubly Curved ◽  
Curved Panels ◽  
Orthogonal Set

Static and dynamic instability characteristics of curved laminates with internal damage subjected to follower loading

2011 ◽  
Vol 225 (7) ◽  
pp. 1589-1600 ◽  
Author(s):  
S Biswas ◽  
P K Datta ◽  
C D Kong
Keyword(s):  
Dynamic Instability ◽  
Shear Deformation Theory ◽  
Internal Damage ◽  
First Order ◽  
Static And Dynamic Instability ◽  
Element Approach ◽  
Formulation Analysis ◽  
Flutter Load ◽  
Doubly Curved ◽  
Curved Panels

This article deals with the study of vibration, buckling, and dynamic instability characteristics in damaged cross-ply and angle-ply curved laminates under uniform, uniaxial follower loading, using finite element approach. First-order shear deformation theory is used to model the doubly curved panels and is formulated according to Sandars' first approximation. Damage is modelled using an anisotropic damage formulation. Analysis is carried out on plate and three types of curved panels to obtain vibration, buckling, and dynamic instability (flutter) behaviour. The effect of damage on natural frequency, critical buckling load, flutter load, and flutter frequency is studied. The results show that the introduction of damage influences the flutter characteristics of panels more profoundly than the free-vibration or buckling characteristics. The results also indicate that, compared to undamaged panels, heavily damaged panels show steeper deviations in stability characteristics than mildly damaged ones.

PARAMETRIC COMBINATION RESONANCE CHARACTERISTICS OF DOUBLY CURVED PANELS SUBJECTED TO NON-UNIFORM HARMONIC EDGE LOADING

2005 ◽  
Vol 05 (04) ◽  
pp. 615-639 ◽  
Author(s):  
RATNAKAR S. UDAR ◽  
P. K. DATTA
Keyword(s):  
Shear Deformation ◽  
Dynamic Instability ◽  
Excitation Frequency ◽  
Instability Region ◽  
Load Factor ◽  
Combination Resonance ◽  
Edge Loading ◽  
Instability Regions ◽  
Doubly Curved ◽  
Curved Panels

This paper is concerned with the problem of occurrence of combination resonances in parametrically excited doubly curved panels. The dynamic instability of doubly curved panels, subjected to non-uniform in-plane harmonic loading is investigated. Sander's first-order shear deformation theory is used to model the doubly curved panels, considering the effects of transverse shear deformation and rotary inertia. The theory can be reduced to Love's and Donnell's theories by means of tracers. Analytical expressions for the instability regions are obtained at Ω = ωm+ ωn(Ω is the excitation frequency and ωmand ωnare the natural frequencies of the system), by using the method of multiple scales. It is shown that besides the principal instability region at Ω =2ω1, where ω1is the fundamental frequency, other cases of Ω = ωm+ ωnwhich are related to other modes, can be of major importance and yield a significantly enlarged instability region. The results show that under localized edge loading, combination resonance zones are as important as simple resonance zones. The effects of edge loading, curvature, shallowness ratio, edge length to thickness ratio, aspect ratio, boundary conditions and the static load factor on dynamic instability regions are considered.

Nonlinear vibration of FGM doubly curved panels resting on elastic foundations in thermal environments

2015 ◽  
Vol 47 ◽  
pp. 434-446 ◽  
Author(s):  
Hui-Shen Shen ◽  
Xiuhua Chen ◽  
Licheng Guo ◽  
Linzhi Wu ◽  
Xiao-Lin Huang
Keyword(s):  
Nonlinear Vibration ◽  
Elastic Foundations ◽  
Thermal Environments ◽  
Doubly Curved ◽  
Curved Panels
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