Mecanique & Industries最新文献

Analyse du comportement dynamique d’une broche de machine-outils 机床主轴的动态行为分析

Mecanique & Industries Pub Date : 2012-01-19 DOI: 10.1051/meca/2011138

Claudiu-Florinel Bisu, Mihai Ghinea, Alain G'erard, Miron Zapciu, Marin Anica

引用次数: 1

Dynamique de bulles traversant l’interface séparant deux liquides 通过两种液体分离界面的气泡动力学

Mecanique & Industries Pub Date : 2011-07-20 DOI: 10.1051/MECA/2011108

R. Bonhomme, J. Magnaudet, Bruno Piar

引用次数: 0

AIR2, un robot parallèle à actionnement pneumatique à deux degrés de liberté pour les applications de prise et dépose d’objets AIR2，一个平行的两自由度气动驱动机器人，用于抓取和移除物体

Mecanique & Industries Pub Date : 2011-07-08 DOI: 10.1051/MECA/2011106

Lotfi Chikh, Cédric Baradat, Philippe Poignet, F. Pierrot, Micaël Michelin

引用次数: 0

Modélisation des couplages fluide/solide dans les procédés d’assemblage à haute température 高温装配过程中流体/固体耦合的建模

Mecanique & Industries Pub Date : 2011-05-20 DOI: 10.1051/MECA/2011113

Thomas Heuzé, J. Leblond, J. Bergheau

{"title":"Modélisation des couplages fluide/solide dans les procédés d’assemblage à haute température","authors":"Thomas Heuzé, J. Leblond, J. Bergheau","doi":"10.1051/MECA/2011113","DOIUrl":"https://doi.org/10.1051/MECA/2011113","url":null,"abstract":"On developpe dans ces travaux un outil numerique permettant de simuler le procede Friction Stir Spot Welding. Le modele est base sur un couplage fluide/solide et permet une description correcte des parties fortement malaxee et solide de la structure. Une approche ALE est utilisee avec un mouvement arbitraire defini de facon que le maillage suive la matiere dans la partie solide mais pas dans la partie pâteuse. Ceci permet la simulation de plusieurs tours de l'outil tout en suivant les bords des toles soudees durant le procede. Ce modele numerique s'appuie sur l'element fini mixte P1+/P1. Ce dernier a ete developpe avec une formulation temperature/vitesse/pression en mecanique des fluides (dans le cas d'un ecoulement laminaire incompressible et transitoire) et en mecanique des solides dans le cadre des grandes transformations. La transition fluide/solide est effectuee au moyen d'un test explicite sur une temperature moyenne par element, l'interface passant alors entre les elements du maillage. Une procedure d'actualisation de la geometrie associee a l'approche ALE est effectuee a convergence. Ce couplage a ete integre au sein d'une nouvelle option du code SYSWELD. On presente ici une premiere simulation du procede Friction Stir Spot Welding. D'autre part, deux montages specifiques sont proposes pour l'investigation du procede Friction Stir Spot Welding. Ces deux dispositifs integrent une demarche de validation globale visant a calibrer la modelisation proposee du procede. La strategie experimentale suivie est detaillee, et des premiers resultats obtenus sur un alliage d'aluminium basique sont presentes.","PeriodicalId":49847,"journal":{"name":"Mecanique & Industries","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89700953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

Improved performance of hydrodynamic bearings by proactive adjustment 通过主动调整提高了流体动力轴承的性能

Mecanique & Industries Pub Date : 2011-03-14 DOI: 10.1051/MECA/2011005

J. K. Martin

引用次数: 8

APTA: advanced probability-based tolerance analysis of products APTA:基于概率的高级产品公差分析

Mecanique & Industries Pub Date : 2011-01-01 DOI: 10.1051/MECA/2011014

N. Gayton, N. Gayton, Paul Beaucaire, Jean-Marc Bourinet, E. Duc, M. Lemaire, L. Gauvrit

{"title":"APTA: advanced probability-based tolerance analysis of products","authors":"N. Gayton, N. Gayton, Paul Beaucaire, Jean-Marc Bourinet, E. Duc, M. Lemaire, L. Gauvrit","doi":"10.1051/MECA/2011014","DOIUrl":"https://doi.org/10.1051/MECA/2011014","url":null,"abstract":"In mass production, the customer defines the constraints of assembled products by functional and quality requirements. The functional requirements are expressed by the designer through the chosen dimensions, which are linked by linear equations in the case of a simple stack-up or non-linear equations in a more complex case. The customer quality requirements are defined by the maximum allowable number of out-of-tolerance assemblies. The aim of this paper is to prove that quality requirements can be accurately predicted in the design stage thanks to a better knowledge of the statistical characteristics of the process. The authors propose an approach named Advanced Probability based Tolerance Analysis (APTA), assessing the defect probability (called P D ) that the assembled product has of not conforming to the functional requirements. This probability depends on the requirements (nominal value, tolerance, capability levels) set by the designer for each part of the product and on the knowledge of production devices that will produce batches with variable statistical characteristics (mean value, standard deviation). The interest of the proposed methodology is shown for linear and non-linear equations related to industrial products manufactured by the RADIALL SA Company.","PeriodicalId":49847,"journal":{"name":"Mecanique & Industries","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76630121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 11

Exploitation des études de capabilité dans le calcul statistique des tolérances géométriques de localisation 能力研究在几何位置公差统计计算中的应用

Mecanique & Industries Pub Date : 2011-01-01 DOI: 10.1051/MECA/2011140

Antoine Tahan, S. Lévesque

引用次数: 0

Impact of lubricant contamination with water on hydrodynamic thrust bearing performance 润滑油含水污染对流体动力推力轴承性能的影响

Mecanique & Industries Pub Date : 2011-01-01 DOI: 10.1051/MECA/2011120

E. Harika, M. Helene, J. Bouyer, M. Fillon

{"title":"Impact of lubricant contamination with water on hydrodynamic thrust bearing performance","authors":"E. Harika, M. Helene, J. Bouyer, M. Fillon","doi":"10.1051/MECA/2011120","DOIUrl":"https://doi.org/10.1051/MECA/2011120","url":null,"abstract":"Several studies have been carried out in order to describe the impact of water-contaminated lubricants on lubrication performance. One approach considers the water-contaminated oil as a homogeneous lubricant with physical characteristics varying with water concentration. The presented work is being achieved in order to experimentally validate this theory. First investigations showed that the variation of contaminated lubricant viscosity has the most significant effect on lubricating performance. Consequently, the lubricant viscosity is the only parameter taken into account in this study. Thus, based on the rheological measurements, water-in-oil emulsion viscosity has been modelled according to water concentration and temperature. Water concentration was considered relatively to total mass of oil: the mass concentration varied then from 0 to 7% and temperature from 10 to 80 °C. Viscosity modelling was then used to perform the numerical simulations of a hydrodynamic thrust bearing supplied with water contaminated oil. Finally, the experimental validation will be done by measuring various bearing characteristics like the film/pad temperature, the film thickness and the friction torque on a tilting pad thrust bearing test rig.","PeriodicalId":49847,"journal":{"name":"Mecanique & Industries","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82831986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 19

Material and component investigations on a Ti-6-4 fitting element Ti-6-4接头元件的材料和部件研究

Mecanique & Industries Pub Date : 2011-01-01 DOI: 10.1051/MECA/2011130

W. Tan, M. Stoschka, M. Riedler, W. Eichlseder, F. Romagnoli, Vinícius Rondon

引用次数: 1

Étanchéités statiques des écoulements de filtration au voisinage du point critique 过滤流在临界点附近的静态密封

Mecanique & Industries Pub Date : 2011-01-01 DOI: 10.1051/MECA/2011009

Raouf Khelalfa, J. Darrozes, J. Durastanti

引用次数: 2