References of "Debongnie, Jean-François"
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See detailExpertise relative à l'affaire AMFA/URANIO - Conclusions
Debongnie, Jean-François ULg

Report (1994)

Le fabricant de batteries URANIO a commandé à la firme AMFA une machine à enrober les électrodes de plomb. Il se plaint que la machine ne répond pas au cahier des charges.

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See detailOptimalisation des opérations de tournage : la méthode de la puissance disponible
Debongnie, Jean-François ULg

Report (1993)

Tailor's results on machining optimization always assume that the power of the machine tool is not a limitation. However, this not necessarily true, specially in the case of rough machining, where ... [more ▼]

Tailor's results on machining optimization always assume that the power of the machine tool is not a limitation. However, this not necessarily true, specially in the case of rough machining, where Taylorian optima are out of the power range of the machine. In this paper, an algorithm is proposed, where the machine capacity is the first consideration. The obtained result is then corrected in view of the tool life. [less ▲]

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See detailConsidérations économiques relatives à l'usinage léger
Debongnie, Jean-François ULg

Report (1993)

This report focuses on the classical Taylorian optimization of the cuting speed. An interesting result is the supply curve of the turning operation, which has an unconventional aspect when working outside ... [more ▼]

This report focuses on the classical Taylorian optimization of the cuting speed. An interesting result is the supply curve of the turning operation, which has an unconventional aspect when working outside of the productivity range [less ▲]

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See detailSur une mesure locale de l'erreur de discrétisation par éléments finis
Debongnie, Jean-François ULg

Report (1993)

Local discretization errors are commonly done by inspecting local equilibrium errors. The difficulty lies in the fact that there is not, in general, a local convergence of equilibrium. Our point of view ... [more ▼]

Local discretization errors are commonly done by inspecting local equilibrium errors. The difficulty lies in the fact that there is not, in general, a local convergence of equilibrium. Our point of view is that desequilibrium has to be considered in its natural frame, which is the dual space. In other word, desequilibrium has to be measured by the work that it is able to produce. Such quasi-local error measures are presented. [less ▲]

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See detailFondements théoriques des essais accélérés d'usure des outils
Debongnie, Jean-François ULg

Report (1993)

Accelerated wear tests of tools are used from the pioneering works of brandsma in 1936. But their justification is often somewhat intuitive. A formalized description of these test is presented, based upon ... [more ▼]

Accelerated wear tests of tools are used from the pioneering works of brandsma in 1936. But their justification is often somewhat intuitive. A formalized description of these test is presented, based upon an analysis of the conditions of validity of the cumulative damage principle. This gives the basis for a comparison between proposed procedures. It is found that some of them make use of stronger hypotheses and are thus of less theoretical value. [less ▲]

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See detailComportement à grande vitesse des roulements à billes à gorges profondes chargés radialement
Debongnie, Jean-François ULg; Bozet, Jean-Luc ULg

Conference (1993)

Première étape d'une étude du comportement des roulements à billes à grande vitesse.

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See detailConditions de coupe en tournage
Debongnie, Jean-François ULg

Learning material (1993)

This is a data set on the parameters of Taylor's law for a lot of materials and tool types

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See detailHydoelastic analysis using the finite element method
Piret, G.; Debongnie, Jean-François ULg; Géradin, Michel ULg

Report (1992)

Part 1 : The finite element formulation for fluid-structure problems - To the best of our knowledge, the first purely lagrangian formulation was proposed by Debongnie. At this time, even though natural ... [more ▼]

Part 1 : The finite element formulation for fluid-structure problems - To the best of our knowledge, the first purely lagrangian formulation was proposed by Debongnie. At this time, even though natural, this idea as well as the notion of displacement potential led to some surprises. Thes rationalizing efforts led to the final formulation of the corrected Tong's formulation in 1978 and to the corresponding formulation for the compressible case in 1984. Similar results were obtained by Morand in 1987. Here, contrarily to our preceeding papers, we present the formulation from a local point of view instead of a variational one. PART 2 : On the representation of rigid body modes with the SAMCEF formulation for hydroelastic problems - The question to see wether the SAMCEF formulation of hydroelastic problems respects the rigid body modes is often raised. It appear very often that some of the rotational rigid body modes are lost for the fre-free problem. The present report tries to give a better understanding of this problem. PART 3 - Dynamic analysis of fluid-structure problems : results. [less ▲]

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See detailEtude approchée des roulements rigides à billes chargé radialement, dans le cas des grandes vitesses
Debongnie, Jean-François ULg

Report (1992)

The classical rolling bearing theory lies on the assumption that the rotational speed is low. The simplest correction for high speeds consists in adding only the centrifugal load. But even in this frame ... [more ▼]

The classical rolling bearing theory lies on the assumption that the rotational speed is low. The simplest correction for high speeds consists in adding only the centrifugal load. But even in this frame, the problem is by far complicated. However, in the case of a radial load, it is possible to develop an approximated formulation which easily leads to realistic results. This elementary theory may be used as a basis of comparison for more evolved theories, which may be useful. [less ▲]

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See detailConsistance de l'étude linéarisée des structures précontraintes
Debongnie, Jean-François ULg

Report (1991)

The linearized study of pre-stressed structures is, by far, not a novelty. But its practical application led to a lot of disappointments, especially concerning rigid body modes, so that it seemed useful ... [more ▼]

The linearized study of pre-stressed structures is, by far, not a novelty. But its practical application led to a lot of disappointments, especially concerning rigid body modes, so that it seemed useful to try a restatement of this subject. After an exposition of the principles of this formulation, the attention is focused on the numerous simplifications which are commonly done, by tradition or for sake of simplicity. This study is illustrated by a lot of examples whose purpose is an aid for the physical understanding of the problem. [less ▲]

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See detailSur la représentation des modes rigides dans la formulation SAMCEF des problèmes hydro-élastiques
Debongnie, Jean-François ULg

Report (1990)

A frequently asked question is to know if the SAMCEF formulation of hydro-elastic problems allows a correct representation of the rigid body modes. In fact, it is current to analyse the free-free ... [more ▼]

A frequently asked question is to know if the SAMCEF formulation of hydro-elastic problems allows a correct representation of the rigid body modes. In fact, it is current to analyse the free-free vibrational problem, and some people were surprised to loose rotational rigid body modes. The purpose of the present report is to enlighten this point. [less ▲]

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See detailSur la formulation de l'U.T.C. des problèmes hydroélastiques
Debongnie, Jean-François ULg

Report (1990)

This paper analyses the U.T.C. formulation of hydroelastic problems, where the fluid is represented by an integral formulation. The common features of this formulation with the SAMCEF formulation are ... [more ▼]

This paper analyses the U.T.C. formulation of hydroelastic problems, where the fluid is represented by an integral formulation. The common features of this formulation with the SAMCEF formulation are enlighted and the difficult problem of the fluid-structure connexion is treated in detail. [less ▲]

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See detailCalcul des Tribunes du Collège de Chaulnes
Debongnie, Jean-François ULg

Report (1990)

Calcul de la résistance des tribunes d'un collège français, en vue de leur certification par les pompiers.

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See detailSur le contact linéaire technique
Debongnie, Jean-François ULg

Report (1989)

This paper develops, from the technical linear contact concept, a step leading to an analytical prediction of the mutual displacement of two bodies in linear hertzian contact. The results are compared to ... [more ▼]

This paper develops, from the technical linear contact concept, a step leading to an analytical prediction of the mutual displacement of two bodies in linear hertzian contact. The results are compared to the approximate expressions of Dowson and Higginson, Lundberg, and Eschmann et al. [less ▲]

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See detailProgrammes relatifs à lapaie - version 4.0
Debongnie, Jean-François ULg

Report (1989)

Manuel d'une version du programme de paie incluant des modifications des règles adoptées. Comme ce programme est conversationnel et très convivial, ce manuel se limite à décrire les chemins à suivre pour ... [more ▼]

Manuel d'une version du programme de paie incluant des modifications des règles adoptées. Comme ce programme est conversationnel et très convivial, ce manuel se limite à décrire les chemins à suivre pour organiser correctement les cas courants de paie. [less ▲]

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See detailTraitement du concours d'entrée
Debongnie, Jean-François ULg

Report (1988)

Il s'agit du manuel d'utilisation du programme écrit par l'auteur pour traiter les résultats du concours d'entrée à l'ESIE. (Il s'agit d'un concours international). Ce programme permet (1) de créer le ... [more ▼]

Il s'agit du manuel d'utilisation du programme écrit par l'auteur pour traiter les résultats du concours d'entrée à l'ESIE. (Il s'agit d'un concours international). Ce programme permet (1) de créer le fichier des élèves, contenant également le nom de leur pays, de leur société et leur centre au sein de celle-ci ; (2) de transformer ce fichier en fichier sans format à accès direct ; (3) d'enregistrer les notes, matière par matière ; (4) d'apporter des corrections aux données enregistrées ; (5) d'effectuer le classement général ainsi que le classement par pays. [less ▲]

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See detailConception assistée par ordinateur d'un palier rigide à billes
Debongnie, Jean-François ULg

Report (1988)

This report presents a program for the complete design of a deep groove ball bearing which is submitted to a plane sollicitation. This programs includes a catalogue consultation and the assessment of the ... [more ▼]

This report presents a program for the complete design of a deep groove ball bearing which is submitted to a plane sollicitation. This programs includes a catalogue consultation and the assessment of the tolerances of both races. For these, the computation is based on the exact nonlinear formulation of the problem, and not on approximate values of the catalogues. In particular, it allows to find the infuence of the clearance on the stiffness of the bearing. The bending moment is taken in account. In order to solve the nonlinear equations of the theory, a Newton-Raphson procedure is introduced. In this problem, a proper choice of the starting point is of paramount importance, as the reference position is stiffness-free. This problem is dicussed in detail. The second part of this report presents the ROULBI program and comments its different steps. [less ▲]

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See detailSur les équations classiques des turbomachines
Debongnie, Jean-François ULg

Report (1988)

The aim of this report is to obtain the classical equations of turbomachines in a rigorous step.

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See detailTraitement des examens
Debongnie, Jean-François ULg

Report (1988)

Manuel d'utilisation d'un programme établi par l'auteur pour gérer les cotes d'examen et faire les bulletins

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See detailProgrammes relatifs à la paie
Debongnie, Jean-François ULg

Report (1988)

Manuel d'utilisation d'un programme de paie du personnel réalisé par l'auteur à l'ESIE

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