发布求助
文献互助 智能选刊 最新文献

Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics最新文献

筛选
英文 中文
Convection mixte en régime transitoire de couche limite laminaire sur une plaque verticale 垂直板上层压板边界层瞬态混合对流
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics Pub Date : 2001-09-01 DOI: 10.1016/S1620-7742(01)01377-0
Ton Hoang Mai, Ryad Zebiri, Thierry de Lorenzo
{"title":"Convection mixte en régime transitoire de couche limite laminaire sur une plaque verticale","authors":"Ton Hoang Mai,&nbsp;Ryad Zebiri,&nbsp;Thierry de Lorenzo","doi":"10.1016/S1620-7742(01)01377-0","DOIUrl":"10.1016/S1620-7742(01)01377-0","url":null,"abstract":"<div><p>This work deals with transient laminar boundary layer along a vertical surface and system of equations is solved using finite difference implicite scheme. We show that the nature of the plate influence thermal and dynamical boundary layer thicknesses as well as the flow velocity. Moreover, we observe that a small perturbation of the velocity implies to flow laminar instabilities.</p></div>","PeriodicalId":100302,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics","volume":"329 9","pages":"Pages 627-631"},"PeriodicalIF":0.0,"publicationDate":"2001-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1620-7742(01)01377-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86754649","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: 2
Identification of concentrated structures in slightly compressible two-dimensional flows 微压缩二维流动中集中结构的识别
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics Pub Date : 2001-09-01 DOI: 10.1016/S1620-7742(01)01388-5
Emmanuel Creusé , Iraj Mortazavi
{"title":"Identification of concentrated structures in slightly compressible two-dimensional flows","authors":"Emmanuel Creusé ,&nbsp;Iraj Mortazavi","doi":"10.1016/S1620-7742(01)01388-5","DOIUrl":"10.1016/S1620-7742(01)01388-5","url":null,"abstract":"<div><p>In this paper, different vortex diagnostic methods are compared to obtain a better understanding of boundary layer influence on the transport of vortical structures involving a complete analysis of vorticity, the Vorticity Threshold Criterion (VTC), and the Weiss Criterion (WC). These three techniques are basically confronted to find a suitable understanding of all flow characteristics for a range of laminar to transitional Reynolds numbers. The computations on this dihedral plane are done using a 2D DNS method. The Weiss criterion, coming from the analysis of the incompressible Euler equations is validated and applied to low speed compressible flows (Mach number=0.2).</p></div>","PeriodicalId":100302,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics","volume":"329 9","pages":"Pages 693-699"},"PeriodicalIF":0.0,"publicationDate":"2001-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1620-7742(01)01388-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86215464","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: 1
Influence d'un obstacle central sur la transmission d'une détonation d'un tube dans un grand volume 中心障碍物对大体积管爆炸传播的影响
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics Pub Date : 2001-09-01 DOI: 10.1016/S1620-7742(01)01386-1
Boris Khasainov , Cédric Priault , Henri-Noël Presles , Daniel Desbordes
{"title":"Influence d'un obstacle central sur la transmission d'une détonation d'un tube dans un grand volume","authors":"Boris Khasainov ,&nbsp;Cédric Priault ,&nbsp;Henri-Noël Presles ,&nbsp;Daniel Desbordes","doi":"10.1016/S1620-7742(01)01386-1","DOIUrl":"10.1016/S1620-7742(01)01386-1","url":null,"abstract":"<div><p>This work describes the mechanisms involved in the critical detonation transmission from a cylindrical tube into a half space through an annular orifice around a central obstacle. The numerical simulation reproduces faithfully the experimental observations and can be used as a predictive tool.</p></div>","PeriodicalId":100302,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics","volume":"329 9","pages":"Pages 679-685"},"PeriodicalIF":0.0,"publicationDate":"2001-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1620-7742(01)01386-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84287966","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: 5
Équation énergétique locale pour la prevision des niveaux vibratoires et acoustiques instationnaires 预测瞬态振动和声级的局部能量方程
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics Pub Date : 2001-09-01 DOI: 10.1016/S1620-7742(01)01384-8
Mohammed Najib Ichchou, Louis Jezequel
{"title":"Équation énergétique locale pour la prevision des niveaux vibratoires et acoustiques instationnaires","authors":"Mohammed Najib Ichchou,&nbsp;Louis Jezequel","doi":"10.1016/S1620-7742(01)01384-8","DOIUrl":"10.1016/S1620-7742(01)01384-8","url":null,"abstract":"<div><p>Insights and additionnal clarifications concerning the energy diffusion model [4] are in concern herein. We showed in former times under steady state conditions, that the diffusion model is well suited for an uncorrelated plane wave dynamics [7], energy behaviour modelling. We will prove, in this short note, that the later is not enough when transient dynamics is in concern. We thus propose a new equation alternative to the diffusion equation.</p></div>","PeriodicalId":100302,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics","volume":"329 9","pages":"Pages 663-670"},"PeriodicalIF":0.0,"publicationDate":"2001-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1620-7742(01)01384-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73023022","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: 1
A modified affine theory for the overall properties of nonlinear composites 非线性复合材料整体性能的修正仿射理论
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics Pub Date : 2001-09-01 DOI: 10.1016/S1620-7742(01)01382-4
Renald Brenner , Olivier Castelnau , Pierre Gilormini
{"title":"A modified affine theory for the overall properties of nonlinear composites","authors":"Renald Brenner ,&nbsp;Olivier Castelnau ,&nbsp;Pierre Gilormini","doi":"10.1016/S1620-7742(01)01382-4","DOIUrl":"https://doi.org/10.1016/S1620-7742(01)01382-4","url":null,"abstract":"<div><p>The expressions of the intraphase second moments of stress and strain in heterogeneous linear thermoelastic materials are derived; they are used to quantify the intraphase heterogeneity predicted by the ‘classical affine’ formulation for the homogenization of nonlinear composites. By analogy with the ‘modified secant’ approach, a ‘modified affine’ formulation that accounts for intraphase heterogeneity is proposed.</p></div>","PeriodicalId":100302,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics","volume":"329 9","pages":"Pages 649-654"},"PeriodicalIF":0.0,"publicationDate":"2001-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1620-7742(01)01382-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72284581","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: 21
Approche par contrôle optimal des structures élastoviscoplastiques sous chargement cyclique 循环荷载下弹性粘塑性结构的最优控制方法
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics Pub Date : 2001-09-01 DOI: 10.1016/S1620-7742(01)01381-2
Michaël Peigney, Claude Stolz
{"title":"Approche par contrôle optimal des structures élastoviscoplastiques sous chargement cyclique","authors":"Michaël Peigney,&nbsp;Claude Stolz","doi":"10.1016/S1620-7742(01)01381-2","DOIUrl":"10.1016/S1620-7742(01)01381-2","url":null,"abstract":"<div><p>The optimal control theory is used to study the asymptotic behavior of elastoviscoplastic structures under cyclic loading. With this approach the asymptotic state is solution of a minimization problem. For practical applications an approximate problem is introduced consistently with a spatial discretization. In this framework, the only stationary points of the functional to minimize are the global minima.</p></div>","PeriodicalId":100302,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics","volume":"329 9","pages":"Pages 643-648"},"PeriodicalIF":0.0,"publicationDate":"2001-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1620-7742(01)01381-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84137638","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: 17
Eléments finis mixtes 3D adaptés au calcul des surcontraintes dans les assemblages de composites 适用于计算复合材料组件中过应力的3D混合成品元件
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics Pub Date : 2001-09-01 DOI: 10.1016/S1620-7742(01)01378-2
David Crépin, Mariusz Pyrz, Géry De Saxcé
{"title":"Eléments finis mixtes 3D adaptés au calcul des surcontraintes dans les assemblages de composites","authors":"David Crépin,&nbsp;Mariusz Pyrz,&nbsp;Géry De Saxcé","doi":"10.1016/S1620-7742(01)01378-2","DOIUrl":"https://doi.org/10.1016/S1620-7742(01)01378-2","url":null,"abstract":"<div><p>An original mixed finite element well suited to stress intensity factor extraction in 3D composite structures is proposed in this study. A numerical example of insert/sandwich junction illustrates the approach.</p></div>","PeriodicalId":100302,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics","volume":"329 9","pages":"Pages 633-636"},"PeriodicalIF":0.0,"publicationDate":"2001-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1620-7742(01)01378-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72284582","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: 3
Interprétation de la double structure observée dans l'onde de détonation du nitrométhane gazeux 解释硝基甲烷气体爆炸波中观察到的双重结构
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics Pub Date : 2001-09-01 DOI: 10.1016/S1620-7742(01)01387-3
Nathalie Lamoureux, Christophe Matignon, Michel-Olivier Sturtzer, Daniel Desbordes, Henri-Noël Presles
{"title":"Interprétation de la double structure observée dans l'onde de détonation du nitrométhane gazeux","authors":"Nathalie Lamoureux,&nbsp;Christophe Matignon,&nbsp;Michel-Olivier Sturtzer,&nbsp;Daniel Desbordes,&nbsp;Henri-Noël Presles","doi":"10.1016/S1620-7742(01)01387-3","DOIUrl":"10.1016/S1620-7742(01)01387-3","url":null,"abstract":"<div><p>Calculations of the reaction zone of the detonation of gaseous nitromethane, either pure or diluted with oxygen, in the range of equivalence ratio <em>Φ</em> between 0.1 and 1.75, show that for 1.75⩾<em>Φ</em>⩾1.3 the chemical energy is released in two main successive reaction steps characterized by very different induction times. These results corroborate the experimental observations of two levels of cellular structures in the same range of equivalence ratios. To our knowledge this work is the first which deals with the problem of nonmonotonous chemical energy release behind the leading shock of a detonation wave.</p></div>","PeriodicalId":100302,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics","volume":"329 9","pages":"Pages 687-692"},"PeriodicalIF":0.0,"publicationDate":"2001-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1620-7742(01)01387-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77995743","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: 9
Impact non-pénétrant sur le thorax : une contribution à l'étude de la propagation des ondes 对胸部的非穿透性冲击:对波传播研究的贡献
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics Pub Date : 2001-09-01 DOI: 10.1016/S1620-7742(01)01383-6
Quentin Grimal, Alexandre Watzky, Salah Naili
{"title":"Impact non-pénétrant sur le thorax : une contribution à l'étude de la propagation des ondes","authors":"Quentin Grimal,&nbsp;Alexandre Watzky,&nbsp;Salah Naili","doi":"10.1016/S1620-7742(01)01383-6","DOIUrl":"10.1016/S1620-7742(01)01383-6","url":null,"abstract":"<div><p>The stress wave generated by a nonpenetrating impact on the thorax is likely to cause severe injury to the lung. Theoretical studies are necessary to help the understanding of injury mechanisms. Within the framework of elastodynamics, we study the transmission of a wave at the interface between two weakly coupled semi-infinite media representing the thoracic wall and the lung. By using an appropriate method, we describe the distribution of energy carried by the shear and pressure waves in the medium representing the lung. These results should contribute to a better interpretation of the experimental results.</p></div>","PeriodicalId":100302,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics","volume":"329 9","pages":"Pages 655-662"},"PeriodicalIF":0.0,"publicationDate":"2001-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1620-7742(01)01383-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88610361","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: 6
Mechanics of wood and trees: some new highlights for an old story 木材和树木的力学:一个古老故事的新亮点
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics Pub Date : 2001-09-01 DOI: 10.1016/S1620-7742(01)01380-0
Bernard Thibaut , Joseph Gril , Mériem Fournier
{"title":"Mechanics of wood and trees: some new highlights for an old story","authors":"Bernard Thibaut ,&nbsp;Joseph Gril ,&nbsp;Mériem Fournier","doi":"10.1016/S1620-7742(01)01380-0","DOIUrl":"10.1016/S1620-7742(01)01380-0","url":null,"abstract":"<div><p>The main aspects of wood mechanics are approached through the role played by wood as the building material of the tree. The main concepts used by nature: progressive setting up of tree weight and architecture, multifunctional role of wood and adaptability to hazard and long-term evolution, are clarified together with their consequence on the multilayered, anisotropic nature of wood. The technological choices of the plant world as the cellular structure, the use of composite with oriented fibres and hydro-carbonated polymers, as well as the systematic prestressing of every new layer, bear obvious consequences on the type of mechanical behaviour of wood. The local control of the level of prestressing through minor modifications of the cell-wall biosynthesis allows the tree to adapt to conditions of light exploration that will evolve according to time and risk occurrence. This analysis of wood genesis process permits in return to improve our understanding of the mechanical behaviour of the material in relation with the parameters of the microstructure.</p></div>","PeriodicalId":100302,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics","volume":"329 9","pages":"Pages 701-716"},"PeriodicalIF":0.0,"publicationDate":"2001-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1620-7742(01)01380-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73409675","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: 56
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信