CMES-Vol. 33, No. 1, 2008

Open Access

ARTICLE

Large Rotations and Nodal Moments in Corotational Elements
J.-M. Battini¹
CMES-Computer Modeling in Engineering & Sciences, Vol.33, No.1, pp. 1-16, 2008, DOI:10.3970/cmes.2008.033.001
Abstract This paper deals with the parameterisation of large rotations in corotational beam and shell elements. Several alternatives, presented in previous articles, are summarised, completed and compared to each other. The implementation of applied external moments and eccentric forces, consistent with the different parameterisations, is also considered. More >

View
1384

Download
1213
Open Access

ARTICLE

Integration of Shell FEA with Geometric Modeling on NURBS Surface Representation for Practical Applications
Maenghyo Cho¹, Jinbok Choi², Hee Yuel Roh³
CMES-Computer Modeling in Engineering & Sciences, Vol.33, No.1, pp. 17-48, 2008, DOI:10.3970/cmes.2008.033.017
Abstract The framework for the linkage between geometric modeling and an analysis based on the NURBS technology is developed in this study. In the present study, The NURBS surfaces were generated by interpolating a given set of data points or by extracting the necessary information to construct the NURBS surface from the IGES format file which was generated by the commercial CAD systems. Numerical examples showed the rate of displacement convergence for the various parameter-izations of the NURBS surface. Quadric surface, which is generated exactly by NURBS representation, was considered. One of the important advantages of More >

View
1481

Download
1082
Open Access

ARTICLE

Dynamic Nonlinear Material Behaviour of Thin Shells in Finite Displacements and Rotations
C.E. Majorana¹, V.A. Salomoni
CMES-Computer Modeling in Engineering & Sciences, Vol.33, No.1, pp. 49-84, 2008, DOI:10.3970/cmes.2008.033.049
Abstract A dynamic analysis of a thin shell finite element undergoing large displacements and rotations is here presented. The constitutive model adopted derives from the coupling of an hyperelastic basic model fulfilling a De Saint Venant-Kirchhoff criterion with a scalar damage function depending on the maximum value of a suitable strain measure attained through the deformation history; then plastic effects are included using an isotropic/kinematic hardening law. A conservative time integration scheme for the non-linear dynamics of the hyperelastic damaged-plastic thin shell is applied. The main characteristic of the scheme is to be conservative, since it More >

View
1201

Download
1022
Open Access

ARTICLE

On Prediction of 3d Stress State in Elastic Shell by Higher-order Shell Formulations
Boštjan Brank¹, Adnan Ibrahimbegovic² and Uroš Bohinc³
CMES-Computer Modeling in Engineering & Sciences, Vol.33, No.1, pp. 85-108, 2008, DOI:10.3970/cmes.2008.033.085
Abstract In this work we study the accuracy of modern higher-order shell finite element formulations in computation of 3d stress state in elastic shells. In that sense we compare three higher-order shell models: (i) with seven displacement-like kinematic parameters, and (ii, iii) with six displacement-like kinematic parameters plus one strain-like kinematic parameter introduced by two different versions of enhanced assumed strain (EAS) concept. The finite element approximations of all shell models are based on 4-node quadrilateral elements. Geometrically nonlinear and consistently linearized forms of considered formulations are given. Several numerical examples are presented, where computed stresses More >

View
1319

Download
979
Open Access

ARTICLE

Computational Modeling of a Lightweight Composite Space Reflector using Geometrically Nonlinear Solid Shell Elements
K. Lee¹, C.T. Wu², G.V. Clarke³, S.W. Lee⁴
CMES-Computer Modeling in Engineering & Sciences, Vol.33, No.1, pp. 109-130, 2008, DOI:10.3970/cmes.2008.033.109
Abstract A geometrically nonlinear finite element analysis of a low areal density composite space reflector is conducted under static conditions and the results are compared with independently carried out experimental data. The finite element analysis is based on an assumed strain formulation of a geometrically nonlinear nine-node solid shell element. Numerical results are in good agreement with experimental data. This demonstrates the effectiveness of the present solid shell element approach when applied to the analysis of highly flexible space structures. The results of numerical analysis and the experimental data reported in the present paper provide a More >

View
1220

Download
987

Per Page:

View

1384

Download

1213

View

1481

Download

1082

View

1201

Download

1022

View

1319

Download

979

View

1220

Download

987

Further Information

Guidelines

Follow Us

Join Us

Contact Us

WhatsApp:

Share Link