Results
author = "Debongnie, Jean-François"
Eléments de tores isoparamétriques développés en séries de Fourier Isoparametric axisymmetric finite elements with a Fourier decomposition
Author(s) :
Debongnie, Jean-François
Description :
This paper is an exposure of the theoretical backgrounds of two isoparametric tor finite elements with a Fourier decomposition. In a second part, a user's manual is given. Finally, practical examples are given.
Repository :
ORBi (University of Liège)
Language(s) :
French
Commentaires sur les quatre essais réalisés chez Renault Comments on the 4 tests performed by Renault
Author(s) :
Debongnie, Jean-François
Description :
RENAULT had performed a series of machining tests in the frame of the feasability study of a machining simulation tool. This report is a first critical analysis of the results.
Repository :
ORBi (University of Liège)
Language(s) :
French
Une loi de similitude de l'endurance des pièces entaillées soumises à la fatigue A similarity law for the endurance of notched parts submitted to fatigue
Author(s) :
Debongnie, Jean-François
Description :
Based on the gradient theory of fatigue, this paper concludes to the existence of an useful similarity law. A large investigation of known results largely confirms this point of view.
Repository :
ORBi (University of Liège)
Language(s) :
French
Some aspects of the finite element errors Quelques aspects des erreurs d'éléments finis
Author(s) :
Debongnie, Jean-François
Description :
The first part is devoted to the a priori error estimations and includes elementary properties of Sobolev spaces. The second part treats on superconvergence.
Repository :
ORBi (University of Liège)
Language(s) :
English
Consistance du lissage des contraintes par convolution Consistency of stress smoothing by convolution
Author(s) :
Debongnie, Jean-François
Description :
A systematic stress smoothing procedure is proposed on the basis of a convolution process. It is then found that in order to be effective, use has to be made of kernels satisfying to a consistency condition, that is, the true stress has not to be changed by the convolution process. A family of consi...
Repository :
ORBi (University of Liège)
Language(s) :
French
Prise en compte des pressions réparties dans les plaques équilibre Adding distributed pressures in equilibrium plate finite elements
Author(s) :
Debongnie, Jean-François
Description :
Equilibrium plate elements are not, in their simplest version, able to take account of a distributed pressure. A particular solution has then to be added. One such solution was develpped by Sander, but is only suitable for elements with first degree moments, as it makes use of the side Kirchhoff loa...
Repository :
ORBi (University of Liège)
Language(s) :
French
Sur le rang de la matrice de raideur de l'élément de tétraèdre statiqument admissible On the rank of the stiffness matrix of the tetrahedral equilibrium element
Author(s) :
Debongnie, Jean-François
Description :
This research concerns the rank of the stiffness matrix of the tetrahedral equilibrium element.
Repository :
ORBi (University of Liège)
Language(s) :
French
De la propriété de certains éléments finis unidimensionnels d'interpoler la solution exacte On the fact that some uni-dimensional finite elements exactly interpolate the solution
Author(s) :
Debongnie, Jean-François
Description :
A general theorem is presented, which is valid for any self-adjoint differential equation, from which it is possible to interpolate the exact solution with particular finite elements, whatever be the second member of the equation.
Repository :
ORBi (University of Liège)
Language(s) :
French
Moderate deflection analysis of shelles of revolution, using cylindrical components of the displacement Analyse des déflexions modérées des coques de révolution, en utilisant les composantes cylindriques des déplacements
Author(s) :
Debongnie, Jean-François
Description :
This paper is devoted to the analysis of shells of revolution, using cylindrical components of the displacement. This procedure, as coupled with a Fourier expansion by respect of the azimuth, permits the generation of finite elements in which rigid body are represented exactly, even in the case of d...
Repository :
ORBi (University of Liège)
Language(s) :
English
Théorie non linéaire des coques d'épaisseur modérée Nonlinear theory of moderate thickness shells
Author(s) :
Debongnie, Jean-François
Description :
This report presents a theory of moderate thickness shells. From an error evaluation process which is founded on the compatibility equations, a strain energy exprssion is found, where stretching and bending are uncoupled.
Repository :
ORBi (University of Liège)
Language(s) :
French