Papers by Jean-François Debongnie
International Journal for Numerical Methods in Engineering, 1979
Journal of Computational and Applied Mathematics, Jul 1, 2004
The paper presents a simulation tool designed to predict form errors of part surfaces obtained by... more The paper presents a simulation tool designed to predict form errors of part surfaces obtained by face milling and turning processes. For these operations, the form error is often due to the exibility of the workpiece and its supports. The ÿnite element method is adopted to model the part geometry and to compute its deformations. Numerous load cases are required to obtain the form error so that classical resolution methods prove to be ine cient (CPU time, memory and disk space). The paper mainly focuses on the special computation scheme adopted in order to improve the resolution of such an atypical problem.
Computer Methods in Applied Mechanics and Engineering, Oct 1, 1986
A general variational principle for fluid-structure interactions is obtained from a purely Lagran... more A general variational principle for fluid-structure interactions is obtained from a purely Lagrangian point of view, thus avoiding any difficulty at the fluid-structure interaction. This rather general variational principle is shown to degenerate, when suitable restrictions are made, in two known formulations, whose range of applicability is defined with the aid of three nondimensional numbers.
The gradient method, often used in design against fatigue, is analyzed from the point of view of ... 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.
La SONACA a acheté une machine-outil de grandes dimensions au constructeur français HLMO. Elle se... more La SONACA a acheté une machine-outil de grandes dimensions au constructeur français HLMO. Elle se plaint de graves dysfonctionnements. La Mutuelle du Mans intervient comme assureur et Siemens en tant que fabricant des moteurs linéaires. Cette expertise a duré cinq ans
The eigenfrequencies of a shell containing a liquid are modified by the static pressure of the fl... more The eigenfrequencies of a shell containing a liquid are modified by the static pressure of the fluid. This implies the computation of the static stress, its transmission to the dynamic analysis where the pre-stress has to be included in the analysis. A lot of tests have been performed in order to verify the correctness of the approach
Calcul de la résistance des tribunes d'un collège français, en vue de leur certification par ... more Calcul de la résistance des tribunes d'un collège français, en vue de leur certification par les pompiers
Uploads
Papers by Jean-François Debongnie