Journal ArticleDOI
Environmental effects on the free vibration of curvilinear fibre composite laminates with cutouts
TLDR
In this paper, the free vibration characteristics of curvilinear fiber composite laminates exposed to hygrothermal environment were studied and a 4-noded shear flexible quadrilateral plate element based on extended finite element approach was employed for the spatial discretization.Abstract:
In this paper, we study the free vibration characteristics of curvilinear fibre composite laminates exposed to hygrothermal environment. The formulation is based on the transverse shear deformation theory and it accounts for the lamina material properties at elevated moisture concentrations and thermal gradients. A 4-noded shear flexible quadrilateral plate element based on extended finite element approach is employed for the spatial discretization. The effect of a centrally located cut-out, modelled within the framework of the extended finite element method, is also studied. A detailed parametric investigation by varying the curvilinear fibre angles at the centre and at the edge of the laminate, the plate geometry, the geometry of the cut-out, the moisture concentration, the thermal gradient and the boundary conditions on the vibration characteristics is numerically studied and it is hoped that this detailed study will help the designers in optimizing such structures under dynamic situation.read more
Citations
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Journal ArticleDOI
Effect of cutout on stochastic natural frequency of composite curved panels
TL;DR: In this article, support vector regression (SVR) based uncertainty quantification (UQ) algorithm in conjunction with Latin hypercube sampling is developed to achieve computational efficiency for laminated composite curved panels with cutout.
Journal ArticleDOI
Free vibration analysis of variable stiffness composite laminated beams and plates by novel hierarchical differential quadrature finite elements
TL;DR: In this paper, the free vibration behavior of the variable stiffness composite laminates (VSCLs) featured by spatially varying fibre orientation angles via novel quasi-three-dimensional solutions is investigated.
Journal ArticleDOI
Thermal buckling behaviour of variable stiffness laminated composite plates
TL;DR: In this article, the thermal buckling behavior of variable stiffness laminated composite plates subjected to thermal loads is numerically studied employing finite element approach based on first-order shear deformation theory.
Journal ArticleDOI
Wave propagation in smart laminated composite cylindrical shells reinforced with carbon nanotubes in hygrothermal environments
Hossein Bisheh,Nan Wu +1 more
TL;DR: In this article, a wave propagation problem is solved in smart laminated CNT-reinforced composite cylindrical shells coupled with piezoelectric layers on the top and bottom surfaces in hygrothermal environments.
Journal ArticleDOI
Variable stiffness laminated composite shells – Free vibration characteristics based on higher-order structural theory
TL;DR: In this paper, the free vibration characteristics of variable stiffness laminated composite shells are numerically studied using a higher-order accurate theory, and it is inferred that the fiber orientation within the lamina changes continuously leading to spatial variation of stiffness of the resulting laminate.
References
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Journal ArticleDOI
A review of extended/generalized finite element methods for material modeling
TL;DR: In this article, the extended and generalized finite element methods are reviewed with an emphasis on their applications to problems in material science: fracture, dislocations, grain boundaries and phase interfaces.
Journal ArticleDOI
The use of curvilinear fiber format to improve buckling resistance of composite plates with central circular holes
Michael W. Hyer,H.H. Lee +1 more
TL;DR: In this article, the authors explored the gains in buckling performance that can be achieved by deviating from the conventional straightline fiber format and considering the situation whereby the fiber orientation in a layer, or a group of layers, can vary from point to point.
Innovative design of composite structures: The use of curvilinear fiber format to improve buckling resistance of composite plates with central circular holes
M. W. Hyer,H. H. Lee +1 more
TL;DR: In this paper, the authors explored the gains in buckling performance that can be achieved by deviating from the conventional straightline fiber format and considering the situation whereby the fiber orientation in a layer, or a group of layers, can vary from point to point.
Journal ArticleDOI
Design of variable-stiffness composite panels for maximum buckling load
TL;DR: In this paper, a generalized reciprocal approximation is presented for the design of variable-stiffness laminated composite panels for maximum buckling load, which allows the maximization to be carried out at each discrete node separate from the others.
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The use of curvilinear fiber format to improve buckling resistance of composite plates with central circular holes
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