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Introduction
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Publications
Publications (24)
We present a new development of digital off-axis (OA) holography for determining the instantaneous solid particle positions in a flow. This holographic imaging method uses a CCD camera for the simultaneous digital recording of two views of digital Fresnel OA holograms on the same support. The reconstruction is obtained numerically. The method provi...
Photo-plates used in classical holography have several advantages, mainly a high resolution and the ability to overlap several holograms. Conversely, they suffer from chemical processing and delays in getting the useful signal. In contrast to film holography, digital holography offers quick and easy access to the desired information but suffers fro...
The follow‐up of particles of the tracer type in the fluids constitutes a field of study rather significant and at the same time rather complex owing to the fact that the number of parameters studied and at the same time significant and concerning the random one. The use of holography as a technique of imagery for the follow‐up of these particles w...
Résumé—Lors de l'usinage des pièces mécaniques, des défauts structuraux telles que les fissures, les soufflures et les inclusions dures peuvent apparaître. En général, ces défauts sont cachés mais ils peuvent être détectés en analysant les signaux des efforts de coupe. Des défauts ont été créés sur la surface cylindrique d'un disque sous forme de r...
Résumé – L'article présente une méthode de détection d'un défaut de structure dans un disque en Aluminium à partir de sa réponse dynamique. La zone endommagée est dimensionnée dans la direction radiale et angulaire. Vu la sensibilité des dérivées spatiales d'ordre quatre de l'équation de mouvement à la présence d'un dommage structural, ces dernière...
In recent years, multiple-attribute decision-making (MADM) methods have gathered significant interest from researchers across various scientific fields. In the case of mechanical part machining when faced with conflicting objectives, these methods have become essential in the selection of necessary cutting parameters.. The integration of these tech...
This study focuses on the performance evaluation of CBN and ceramic tools in dry machining of gray cast iron EN GJL-350. The machining factors taken into account during turning are: cutting speed ( Vc), feed rate ( f), depth of cut ( ap), and cutting tool material (CBN, white ceramic, mixed ceramic, and silicon nitride). The first part of this inve...
This paper focuses on a comparative study of the machinability of two semi-crystalline polymers (POM-C) and (PA-6), during dry turning operations. The aim is to experimentally examine the impact of cutting parameters, namely cutting speed, feed, and depth of cut on surface roughness, cutting force, cutting power, and material removal rate. A series...
The purpose of this research is to assess the performance of CBN and ceramic tools during the dry turning of gray cast iron EN GJL-350. During the turning operation, the variable machining parameters are cutting speed, feed rate, depth of cut and type of the cutting material. This contribution consists of two sections, the first one deals with the...
Intermittent turning (IT) is characterized by a different context than continuous turning (CT). The cutting tool is shocked each time it goes off-load and engages a new surface. This interruption causes severe cutting conditions, which fatally affect the performance parameters. The purpose of this study is to assess the effects of four cutting fact...
In this study, turning operations on polyamide PA66 with cemented carbide insert, were organized according to the L27 Taguchi design whose objective is the analysis of the cutting parameters on the output parameters (Surface roughness and cutting force), as well as on the calculated parameter (material removal rate (Q)). The results revealed that s...
The ‘PA66-GF30’ fulfils a crucial role amid the mechanical industry, particularly
within the mechanical manufacturing on grounds of its high performances like the
rigidity/weight ratio and high resistance. It is nowadays wont to be employed instead
common metallic materials in assorted industrial fields. However, it’s machining presents
enormous di...
In the current paper, cutting parameters during turning of AISI 304 Austenitic Stainless Steel are studied and optimized using Response Surface Methodology (RSM) and the desirability approach. The cutting tool inserts used in this work were the CVD coated carbide. The cutting speed (vc), the feed rate (f) and the depth of cut (ap) were the main mac...
The present paper investigates the cutting parameters pertaining to the turning of X2CrNi18-09 austenitic stainless steel that are studied and optimized using both RSM and desirability approaches. The cutting tool inserts used are the CVD coated carbide. The cutting speed, the feed rate and the depth of cut represent the main machining parameters c...
This paper is an endeavor to compare response surface methodology and artificial neural networks for modeling surface roughness in terms of better coefficient of determination (R2), lower root mean square error (RMSE) and model predictive error (MPE). Models were developed based on optimal design of experiments with 20 experimental runs conducted o...
En vu de suivre l'usure des outils de coupe, la surveillance des processus d'usinage joue un rôle très important dans la minimisation des durées de pannes et l'empêchement de l'apparition de certains phénomènes non désirés tels que le broutement, l'usure excessive ou la rupture de l'outil. Dans ce contexte, la stratégie adoptée dans cette étude con...
In this paper a hybrid method based on the combination of Empirical Mode Decomposition (EMD) and Wavelet Multi-Resolution Analysis (WMRA) is proposed. The pairing of these two time frequency techniques is well adapted to analyze transient signals generated by the tool wear in the machining process. Indeed, the scalar indicators of energy and Mean p...
The objective of this article is to propose Wavelet Multi-Resolution Analysis as an effective tool allowing the improvement of the sensitivity of the scalar indicators for the identification of cutting tool’s degradation state during the machining of X200Cr12 steel. Indeed, these indicators are very sensitive to the variations in the temporal signa...
The important properties of AISI304 austenitic stainless Steel promote their wide use in different industries. However machining this type of Steel is more difficult and need the optimization. In the crurent paper cutting parameters during turning of stainless Steel AISI304 are studied and optimized using RMS and desirability approche.
Résumé : Les pièces mécaniques peuvent contenir des fissures, des soufflures et des inclusions dures cachées dans la matière. En général, ces défauts structuraux peuvent être détectés par des techniques de contrôle non destructif mais ils peuvent aussi avoir naissance au cours des opérations d'usinage et remontent à la surface active de la pièce do...
