An Efficient Finite Element Modeling of Composite Stiffened Shells

2014 ◽  
Vol 553 ◽  
pp. 673-678
Author(s):  
Hamid Sheikh ◽  
Liang Huang
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Degrees Of Freedom ◽  
Torsional Rigidity ◽  
Shell Element ◽  
Beam Element ◽  
Shell Elements ◽  
Element Modeling ◽  
Stiffened Shells ◽  
Element Technique

This paper presents an efficient finite element modeling technique for stiffened composite shells having different stiffening arrangements. The laminated shell skin is modeled with a triangular degenerated curved shell element having 3 corner nodes and 3 mid-side nodes. An efficient curved beam element compatible with the shell element is developed for the modeling of stiffeners which may have different lamination schemes. The formulation of the 3 nod degenerated beam element may be considered as one of the major contributions. The deformation of the beam element is completely defined in terms of the degrees of freedom of shell elements and it does not require any additional degrees of freedom. As the usual formulation of degenerated beam elements overestimates their torsional rigidity, a torsion correction factor is introduced for different lamination schemes. Numerical examples are solved by the proposed finite element technique to assess its performance.

Refined Methods for Tire Computation

1989 ◽  
Vol 17 (4) ◽  
pp. 291-304 ◽  
Author(s):  
A. Domscheit ◽  
H. Rothert ◽  
T. Winkelmann
Keyword(s):  
Finite Element ◽  
Degrees Of Freedom ◽  
Shell Element ◽  
Material Model ◽  
Nonlinear Material ◽  
Shell Elements ◽  
Is Implementation ◽  
Numerical Studies ◽  
Static Contact ◽  
Element Technique

Abstract Realistic computation of automobile tires is best achieved by modeling the whole tire with finite element methods. A numerical solution of the quasi-static contact problem for the whole tire requires a refined mesh of elements with redundant degrees of freedom when nonlinear material assumptions are considered. Both laminated shell elements and incompressible continuum elements are used here. The stiffness matrix of a shell element is determined by numerically integrating all layers within the thickness of each element. Numerical studies have been made by a finite element technique that includes shell elements and Swanson's material model, which covers large deformations. The major contribution of this paper is implementation of a composite theory that includes effects of large displacements on the stiffness into an existing element. Swanson's material law was also simplified and implemented.

New Insight Into Viscoelastic Finite Element Modeling of Time-Dependent Material Creep Problems Using Spherical Hankel Element Framework

2018 ◽  
Vol 10 (08) ◽  
pp. 1850085 ◽  
Author(s):  
M. Bahrampour ◽  
S. Hamzeh Javaran ◽  
S. Shojaee
Keyword(s):  
Finite Element ◽  
Analytical Solution ◽  
Finite Element Modeling ◽  
Degrees Of Freedom ◽  
Shape Functions ◽  
Element Modeling ◽  
Hankel Functions ◽  
Material Creep ◽  
New Formulation ◽  
Insight Into

In this study, a new formulation of finite element method (FEM) has been extracted to analyze 2D viscoelastic problems. As there has not been enough accuracy and not sufficient literature in classical finite element modeling of viscoelastic problems, using a new set of shape functions founded on radial basis functions (RBFs) is recommended. Applying these new, RBF-based shape functions instead of the classical Lagrangian ones, results in subtler answers and conducts a reconsideration over the usual numerical method. Hankel functions are chosen, enriched and summed up with polynomial terms. Therefore, they satisfy not only polynomial terms, but also the first- and second-order Bessel functions simultaneously; which, in the case of classic shape functions, happens only for the polynomial function field. This method illustrates an approach with faster convergence rate and better robustness in different manners. Hence, it is less time-consuming and economical. Finally, various numerical examples are provided for the comparison of analytical solution, classic FEM and Hankel-based FEM, which show the much better agreement of the proposed method with analytical solution in comparison to classic FEM. Also, the number of nodes and degrees of freedom are reduced noticeably while maintaining accuracy in the interpolation of the adopted procedure.

scholarly journals Understanding the Influence of Pressure and Radial Loads on Stress and Displacement Response of a Rotating Body: The Automobile Wheel

2006 ◽  
Vol 2006 ◽  
pp. 1-8 ◽  
Author(s):  
J. Stearns ◽  
T. S. Srivatsan ◽  
X. Gao ◽  
P. C. Lam
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Radial Load ◽  
Inflation Pressure ◽  
Finite Element Technique ◽  
Element Modeling ◽  
Displacement Response ◽  
Rotating Body ◽  
Element Technique ◽  
Automobile Wheel

This paper highlights the use of the finite element technique for analyzing stress and displacement distributions in wheels of automotive vehicles when subject to the conjoint influence of inflation pressure and radial load. The most commonly used considerations in the design of the rotating body are elucidated. A potentially viable technique for finite element modeling of radial wheel, subjected to loading, is highlighted. The extrinsic influence of inflation pressure on performance of the rotating body, that is, the wheel, is rationalized.

Parametric study of pull-out radius for steam generator shell nozzle junction for fast breeder reactor

2012 ◽  
Vol 227 (9) ◽  
pp. 2129-2139 ◽  
Author(s):  
N Mani ◽  
G Thanigaiyarasu ◽  
P Chellapandi
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Steam Generator ◽  
Parametric Study ◽  
Radius Of Curvature ◽  
Fast Breeder Reactor ◽  
Shell Elements ◽  
Element Modeling ◽  
Pull Out

This article presents the parametric study of pull-out radius of steam generator shell nozzle junction for fast breeder reactor. An efficient finite element modeling for shell nozzle junction has been presented in which shell elements are employed to idealize the whole region. In shell nozzle junction, pull-out region is an important part, so that region is taken and studied with different radius of curvature. The pull-out radius varies from 40 to 80 mm. Five models are taken into consideration and each with different radius of curvature. The optimized stress values for all the models are presented here.

Study on Finite Element Modeling of Girder Bridges

2013 ◽  
Vol 671-674 ◽  
pp. 1051-1054
Author(s):  
Xiao Hui Xia
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Beam Element ◽  
Physical Behavior ◽  
Composite Action ◽  
Element Modeling ◽  
Eccentricity Effect ◽  
Girder Bridges ◽  
Modeling Techniques ◽  
Node Location

The modeling techniques selected for girder bridges should be capable of including physical behavior, such as composite action and the eccentricity effect between the slab deck and the girder. In this paper, we find that the ANSYS has the capability of offsetting the beam element from a reference node location in order to define the centric location of the section relative to the node location.

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