References of "Debongnie, Jean-François"
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See detailConsistency of stress smooting by convolution
Debongnie, Jean-François ULg; Beckers, Pierre ULg

Conference (2001, March)

A convolution process is presented in order to smoothen finite element stresses. A comprehensive analysis leads to the fact that a pertinent choice of the convolution kernel has to be done, as consistency ... [more ▼]

A convolution process is presented in order to smoothen finite element stresses. A comprehensive analysis leads to the fact that a pertinent choice of the convolution kernel has to be done, as consistency conditions have to be satisfied. Such kernels are then presented. [less ▲]

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See detailUne loi de similitude de l'endurance des pièces entaillées soumises à la fatigue
Debongnie, Jean-François ULg

Report (2001)

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.

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See detailExpertise relative à l'affaire Duchâteau Révisions/Baiamonte
Debongnie, Jean-François ULg

Report (2001)

le fabricant de ressorts Baiamonte a commandé à Duchâteau-Révisions une machine à bobiner les ressorts. Il en conteste le bon fonctionnement.

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See detailOn a general decomposition of the error of an approximate stress field in elasticity
Debongnie, Jean-François ULg; Beckers, Pierre ULg

in Computer Assisted Mechanics and Engineering Sciences [=CAMES] (2001), 8

The errors of finite element approximations are analysed in a general frame, which is completely independent from the way through which the approximate solution was obtained. It is found that the error ... [more ▼]

The errors of finite element approximations are analysed in a general frame, which is completely independent from the way through which the approximate solution was obtained. It is found that the error always admits decomposition in two terms, namely the equilibrium error and the compatibility error, which are orthogonal. Each of these admits upper and lower bound that can be computed in a post-processing scheme [less ▲]

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See detailQUESTIONS SPECIALES DE TECHNOLOGIE
Debongnie, Jean-François ULg

Book published by DEBONGNIE (JEAN-FRANCOIS) (2001)

Analytical solutions of the rigid-plastic model to forming processes

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See detailOn the link between design against fatigue and fracture mechanics
Debongnie, Jean-François ULg

in ASME (Ed.) Proceedings of the 2000 ASME Design Engineering Technical Conferences (2000, September)

The gradient method, often used in design against fatigue, is analyzed from the point of view of its link with fracture mechanics. By a logical step, a law is deduced for the variation of the endurance ... [more ▼]

The gradient method, often used in design against fatigue, is analyzed from the point of view of its link with fracture mechanics. By a logical step, a law is deduced for the variation of the endurance limit in terms of the relative stress gradient. The proposed expression is found to be in good agreement with older ones and may easily be extended to a large class of materials. [less ▲]

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See detailRevisiting early works of the aerospace laboratory of Liège. Dual analysis, 60's and 70's
Debongnie, Jean-François ULg; Beckers, Pierre ULg

in Nguyen-Dang, Hung; Ronday, François; Nguyen, Van Diep (Eds.) Proceeding of the International colloquium in mechanics of solids, fluids, structures and interactions (2000, August)

The goal of this presentation is to describe the main scientific contribution of the Aerospace Laboratory of the Liège University (LTAS) during the sixties and seventies. This period was very important ... [more ▼]

The goal of this presentation is to describe the main scientific contribution of the Aerospace Laboratory of the Liège University (LTAS) during the sixties and seventies. This period was very important for the development of the finite element techniques and the major part of the concepts and the algorithms were defined at that time. The contribution of the LTAS was especially original because it was the only team in the world who was proposing the dual method and included it in a Finite Element code for all the applications : bar, membrane and plates, using for both types of models the same displacement solution algorithm. After the presentation of this method a short description is made about recent improvements proposed by the authors. [less ▲]

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See detailExpertise relative à l'affaire Coocken/Castronovo - Conclusions
Debongnie, Jean-François ULg

Report (2000)

Le fabricant de gaufres Coocken a acheté au fabricant Castronovo une machine à faire des gaufres. Il estime que cette machine ne fonctionne pas selon ses attentes.

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See detailControlling form errors from 3D measures
Debongnie, Jean-François ULg; Masset, Luc ULg

in ASME (Ed.) Proceedings of the 1999 ASME Design Engineering Technical Conference (1999, September)

Owing to the fact that a correct evaluation of form errors is particularly difficult by the classical ways, it seems more efficient to develop numerical algorithms from 3D measures. Several methods are ... [more ▼]

Owing to the fact that a correct evaluation of form errors is particularly difficult by the classical ways, it seems more efficient to develop numerical algorithms from 3D measures. Several methods are described, including direct and iterative ones. A new method is proposed, which is based on Lp-norms and a specialized algorithm. It proved to be the most effective and robust one on every studied application. [less ▲]

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See detailA model for the prediction of form errors in face milling and turning
Masset, Luc ULg; Debongnie, Jean-François ULg; Foreau, Sylvie et al

in ASME (Ed.) Proceedings of he 1999 ASME Design Engineering Technical Conferences (1999, September)

A method is proposed for predicting form errors due to both clamping and cutting forces in face milling and turning. It allows complex tool trajectories and workpiece geometries. Error computation is ... [more ▼]

A method is proposed for predicting form errors due to both clamping and cutting forces in face milling and turning. It allows complex tool trajectories and workpiece geometries. Error computation is performed by the finite element method. An experimental validation of the model for face milling is presented. Two industrial applications are produced in order to demonstrate the capabilities of the method. [less ▲]

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See detailRecent advances in the dual analysis theory
Debongnie, Jean-François ULg; Beckers, Pierre ULg

Conference (1999, June)

The dual analysis concept, which is one of the oldest methods of measuring the discretization error of finite element models, suffered by its lack of generality in its original version. In fact, severe ... [more ▼]

The dual analysis concept, which is one of the oldest methods of measuring the discretization error of finite element models, suffered by its lack of generality in its original version. In fact, severe restrictions were imposed to the boundary conditions, excluding any mixed problem. These restrictions, related to an analysis where stiffness plays a central role, can be avoided by using the proper reference energy, which is the total complementary energy. This leads to convergence curves which are always on the same side of the exact value and whose distance measures the quality of the analyses. [less ▲]

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See detailExpertise relative à l'affaire KLM/Hoste - Conclusions
Debongnie, Jean-François ULg

Report (1999)

Le concessionnaire automobile KLM a acheté une cabine de peinture de carrosserie au constructeur Hoste. Il se plaint de poussières apparaissant dans ses peintures.

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See detailLa fabrication, un problème de conception
Debongnie, Jean-François ULg

Conference (1999)

Communication about the interactions between design and manufacturing and their necessary complementarity

Detailed reference viewed: 61 (2 ULg)
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See detailSimulation de l'usinage : essais de fraisage
Masset, Luc ULg; Debongnie, Jean-François ULg

Report (1998)

This report describe milling tests which have been done and their comparison to computational results. In order to obtain significant form defects, a very flexible work has been used. Difficulties arose ... [more ▼]

This report describe milling tests which have been done and their comparison to computational results. In order to obtain significant form defects, a very flexible work has been used. Difficulties arose in the primary machining of the workpiece, due to residual stresses. A more efficient machining scheme has then be defined for this step. In order to avoid complications coming from the multiplicity of the teeth of the milling tool, fly-dressing has been considered. The results are discussed in detail. [less ▲]

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See detailSur l'évaluation des défauts de forme à partir de mesures tridimensionnelles
Debongnie, Jean-François ULg; Masset, Luc ULg

in European Journal of Mechanical and Environmental Engineering (1998), 43(1), 13-21

Owing to the fact that a correct evaluation of form errors is particularly difficult by the classical ways, it seems more efficient to develop numerical algorithms from 3D measures. Several methods are ... [more ▼]

Owing to the fact that a correct evaluation of form errors is particularly difficult by the classical ways, it seems more efficient to develop numerical algorithms from 3D measures. Several methods are described, including direct and iterative ones. A new method is proposed, which is based on Lp-norms and a specialized algorithm. It proved to be the most effective and robust one in every studied application. Another problem which is seldom studied, concerns the sensibility of form errors to measure errors. A theory is presented which leads to a very simple result. [less ▲]

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See detailModélisation du bridage
Beckers, Pierre ULg; Debongnie, Jean-François ULg; Deltour, Béatrice et al

Report (1996)

This report is devoted to the modelling of the clamping devices in the projected machining simulation tool

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See detailcatalogue des cas-tests
Beckers, Pierre ULg; Debongnie, Jean-François ULg; Deltour, Béatrice et al

Report (1996)

This report describes the benchmarks which have been done with the machining simulation prototype.

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See detailCommentaires sur les essais d'éprouvettes cylindriques réalisés chez Renault
Debongnie, Jean-François ULg

Report (1996)

Comments on a RENAULT relation of machining tests.

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See detailCommentaires sur les quatre essais réalisés chez Renault
Debongnie, Jean-François ULg

Report (1996)

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.

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See detailComparaisons calculs-essais pour le palier de suspension J64
Beckers, Pierre ULg; Debongnie, Jean-François ULg; Masset, Luc ULg

Report (1996)

This report is devoted to the J64 suspension bearing benchmark. Unfortunately, the actual machining led to considerable vibrations, rendering any comparison impossible.

Detailed reference viewed: 24 (3 ULg)