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-Physics-Chemistry-Astronomy最新文献

筛选
英文 中文
Fluides non miscibles/fluides miscibles : Des similitudes intéressantes 非混溶流体/混溶流体:有趣的相似之处
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Chemistry-Astronomy Pub Date : 1997-11-01 DOI: 10.1016/S1251-8069(97)88173-0
Philippe Petit Jeans, Pascal Kurowski
{"title":"Fluides non miscibles/fluides miscibles : Des similitudes intéressantes","authors":"Philippe Petit Jeans,&nbsp;Pascal Kurowski","doi":"10.1016/S1251-8069(97)88173-0","DOIUrl":"10.1016/S1251-8069(97)88173-0","url":null,"abstract":"<div><p>Different configurations of unstable interfaces between miscible fluids are described. Behavior qualitatively similar to that generally observed between immiscible fluids is reported. Owing to the slowness of molecular diffusion, the density gradient between the two species may induce an equivalent surface tension which could explain these similitudes.</p></div>","PeriodicalId":100304,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Chemistry-Astronomy","volume":"325 10","pages":"Pages 587-592"},"PeriodicalIF":0.0,"publicationDate":"1997-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1251-8069(97)88173-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"108196622","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
Modèle prédictif du comportement dynamique du fluide dans les actionneurs pneumatiques 气动执行机构流体动力学行为的预测模型
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Chemistry-Astronomy Pub Date : 1997-11-01 DOI: 10.1016/S1251-8069(97)88169-9
Olivier Geider, Jean-Charles Maré, Robert Caen
{"title":"Modèle prédictif du comportement dynamique du fluide dans les actionneurs pneumatiques","authors":"Olivier Geider,&nbsp;Jean-Charles Maré,&nbsp;Robert Caen","doi":"10.1016/S1251-8069(97)88169-9","DOIUrl":"10.1016/S1251-8069(97)88169-9","url":null,"abstract":"<div><p>A predictive model of a pneumatic actuator is introduced and validated without any restrictive assumption about the thermal evolution of gas volumes. Taking the thermal balance into account requires the identification of the equivalent exchange coefficient. Estimated values are found not to be sensitive to the jack extension.</p></div>","PeriodicalId":100304,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Chemistry-Astronomy","volume":"325 10","pages":"Pages 553-561"},"PeriodicalIF":0.0,"publicationDate":"1997-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1251-8069(97)88169-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"105921900","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: 0
Effects of solvent and substituents on the kinetics of decomposition of phosphonium cations under the action of strong alkalis in water-methanol and water-dioxane media 溶剂和取代基对水-甲醇和水-二氧六环介质中磷阳离子在强碱作用下分解动力学的影响
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Chemistry-Astronomy Pub Date : 1997-11-01 DOI: 10.1016/S1251-8069(97)89080-X
Fayez Y. Khalil, Morcos T. Hanna, Mervette El-Batouti
{"title":"Effects of solvent and substituents on the kinetics of decomposition of phosphonium cations under the action of strong alkalis in water-methanol and water-dioxane media","authors":"Fayez Y. Khalil,&nbsp;Morcos T. Hanna,&nbsp;Mervette El-Batouti","doi":"10.1016/S1251-8069(97)89080-X","DOIUrl":"10.1016/S1251-8069(97)89080-X","url":null,"abstract":"<div><p>The rate constants of the 3rd order reactions have been measured for the reaction between 3-bromopropyltriphenylphosphonium bromide and sodium hydroxide in water-methanol and water-dioxane media of various compositions. The reaction rate increases continuously with decreasing water content of the solvent. The dominant effect is the extent of solvation of the hydroxyl ions in methanol and dioxane media. The reaction in water-dioxane media is always faster than in methanol-water media and the difference is dependent on solvent composition, where the solvent structure and solvating power vary. The rate of decomposition of 3-bromopropyltriphenylphosphonium is larger than that of tetraphenylphosphonium ion in similar conditions, which is attributed to an inductive effect increasing the positive charge on phosphorus upon introduction of the 3-bromopropyl group. The desolvation of reactants and the solvation of transition states of the two reactions in the two solvents considered were discussed.</p></div>","PeriodicalId":100304,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Chemistry-Astronomy","volume":"325 9","pages":"Pages 545-551"},"PeriodicalIF":0.0,"publicationDate":"1997-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1251-8069(97)89080-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"105961361","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
Un modèle couplant adhérence et frottement pour le contact entre deux solides déformables 两种可变形固体之间的粘附和摩擦耦合模型
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Chemistry-Astronomy Pub Date : 1997-11-01 DOI: 10.1016/S1251-8069(97)89074-4
Michel Raous , Laurent Cangémi , Marius Cocu
{"title":"Un modèle couplant adhérence et frottement pour le contact entre deux solides déformables","authors":"Michel Raous ,&nbsp;Laurent Cangémi ,&nbsp;Marius Cocu","doi":"10.1016/S1251-8069(97)89074-4","DOIUrl":"10.1016/S1251-8069(97)89074-4","url":null,"abstract":"<div><p>A model taking into account unilateral contact condition, friction and adhesion is presented. In the framework of continuum thermodynamics, the contact zone is considered as a material surface and the local constitutive laws are derived by choosing conveniently two specific surface potentials. The adhesion is characterized by a variable <em>β</em>, introduced by <span>Frémond (1987)</span>, which represents the intensity of adhesion. A quasistatic variational formulation and an incremental one are proposed. A numerical method is given to solve the problem. The model is used to simulate an indentation experiment which is conducted to characterize the behaviour of fiber/matrix interfaces in a ceramic composite.</p></div>","PeriodicalId":100304,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Chemistry-Astronomy","volume":"325 9","pages":"Pages 503-509"},"PeriodicalIF":0.0,"publicationDate":"1997-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1251-8069(97)89074-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"100369132","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: 16
Mise en évidence de macles de déformation dans un superalliage monogranulaire γ/γ′ à base de nickel 镍基γ/γ '单晶高温合金变形胶的证明
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Chemistry-Astronomy Pub Date : 1997-11-01 DOI: 10.1016/S1251-8069(97)89078-1
Abdelaziz Ati , Sabine Lay , Roland Bonnet
{"title":"Mise en évidence de macles de déformation dans un superalliage monogranulaire γ/γ′ à base de nickel","authors":"Abdelaziz Ati ,&nbsp;Sabine Lay ,&nbsp;Roland Bonnet","doi":"10.1016/S1251-8069(97)89078-1","DOIUrl":"10.1016/S1251-8069(97)89078-1","url":null,"abstract":"<div><p>An oriented single grain of a γ/γ′ superalloy is deformed by dynamic compression <em>(12%, 20 °C)</em> along <em>[001]</em>. Thin deformation twins are observed for the first time in such a single grain using high resolution electron microscopy. They appear to develop more easily in γ corridors between γ′ precipitates.</p></div>","PeriodicalId":100304,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Chemistry-Astronomy","volume":"325 9","pages":"Pages 531-536"},"PeriodicalIF":0.0,"publicationDate":"1997-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1251-8069(97)89078-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"103875505","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: 0
Contrôle magnétique de la mouillabilité 磁性润湿性控制
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Chemistry-Astronomy Pub Date : 1997-11-01 DOI: 10.1016/S1251-8069(97)89079-3
Élie Raphaël, Pierre-Gilles de Gennes
{"title":"Contrôle magnétique de la mouillabilité","authors":"Élie Raphaël,&nbsp;Pierre-Gilles de Gennes","doi":"10.1016/S1251-8069(97)89079-3","DOIUrl":"10.1016/S1251-8069(97)89079-3","url":null,"abstract":"<div><p>A rubber film is loaded with hard ferromagnetic particles (with a strongly preferred magnetisation axis). The film is prepared with alternate, regions (ribbon-like) of + and — magnetisation, and is fixed on a solid substrate. When a tangential magneticfield H is applied, the free surface should deform into ridges and valleys — thus becoming more wettable.</p></div>","PeriodicalId":100304,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Chemistry-Astronomy","volume":"325 9","pages":"Pages 537-543"},"PeriodicalIF":0.0,"publicationDate":"1997-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1251-8069(97)89079-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"101366870","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: 0
Identification of a 3D object in a shallow sea from scattered sound 从散射声中识别浅海中的3D物体
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Chemistry-Astronomy Pub Date : 1997-10-01 DOI: 10.1016/S1251-8069(97)80067-X
Robert P. Gilbert , Thierry Scotti , Armand Wirgin , Yongzhi S. Xu
{"title":"Identification of a 3D object in a shallow sea from scattered sound","authors":"Robert P. Gilbert ,&nbsp;Thierry Scotti ,&nbsp;Armand Wirgin ,&nbsp;Yongzhi S. Xu","doi":"10.1016/S1251-8069(97)80067-X","DOIUrl":"10.1016/S1251-8069(97)80067-X","url":null,"abstract":"<div><p>The inverse problem is solved by least-squares matching of theoretical fields (for trial objects), employing an approximate field ansatz, to the scattered acoustic wavefield measured on a cylinder fully enclosing the object.</p></div>","PeriodicalId":100304,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Chemistry-Astronomy","volume":"325 7","pages":"Pages 383-389"},"PeriodicalIF":0.0,"publicationDate":"1997-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1251-8069(97)80067-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"92682310","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
Ferroélectriques classiques ou relaxeurs dérivés de BaTiO3 由BaTiO3衍生的经典铁电或松弛剂
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Chemistry-Astronomy Pub Date : 1997-10-01 DOI: 10.1016/S1251-8069(97)89450-X
Jean Ravez, Annie Simon
{"title":"Ferroélectriques classiques ou relaxeurs dérivés de BaTiO3","authors":"Jean Ravez,&nbsp;Annie Simon","doi":"10.1016/S1251-8069(97)89450-X","DOIUrl":"10.1016/S1251-8069(97)89450-X","url":null,"abstract":"<div><p>The present work takes stock of either classical or relaxor ferroelectric ceramics related to <em>BaTiO<sub>3</sub></em>. The homovalent substitutions in the 12 C.N. site lead to a sharp transition at T<sub>C</sub> and to a classical ferroelectric phase. On the contrary, the substitutions in the 6 C.N. site lead to a diffuse transition, and a relaxor ferroelectric phase; these substitutions may be either homovalent (<em>e.g. Ba(Ti<sub>1 − x</sub>Zr<sub>x</sub>)O<sub>3</sub></em>) or heterovalent (<em>e.g. Ba<sub>1 − <em>x</em></sub>K<sub><em>x</em></sub>(Ti<sub>1 − <em>x</em></sub>Nb<sub><em>x</em></sub>)O<sub>3</sub></em>).</p></div>","PeriodicalId":100304,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Chemistry-Astronomy","volume":"325 8","pages":"Pages 481-486"},"PeriodicalIF":0.0,"publicationDate":"1997-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1251-8069(97)89450-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"96112671","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
Continuum mechanical modelling of the dissipative processes in the sediment-water layer below glaciers 冰川下沉积物水层耗散过程的连续力学模拟
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Chemistry-Astronomy Pub Date : 1997-10-01 DOI: 10.1016/S1251-8069(97)89446-8
Francesco dell'Isola , Kolumban Hutter
{"title":"Continuum mechanical modelling of the dissipative processes in the sediment-water layer below glaciers","authors":"Francesco dell'Isola ,&nbsp;Kolumban Hutter","doi":"10.1016/S1251-8069(97)89446-8","DOIUrl":"10.1016/S1251-8069(97)89446-8","url":null,"abstract":"<div><p>The solid mass of the saturated viscous, heat-conducting sediment-water layer below temperate glaciers grows by abrading the underlying rockbed. We propose to model this layer as a saturated mixture continuum of fluid and solid. We formulate its balance laws in volume and jump local forms following, <em>e.g.</em> <span>Germain and Muller (1986)</span>. The water balance accounts for its drainage into the rockbed and the melting of ice within the overlaid ice sheet. Dissipation due to the power expended by stresses, the Darcy interaction force and sliding friction governs this thermomechanical system. Our analysis establishes that, contrary to what is stated in the literature, the listed dissipative mechanisms are all relevant.</p></div>","PeriodicalId":100304,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Chemistry-Astronomy","volume":"325 8","pages":"Pages 449-456"},"PeriodicalIF":0.0,"publicationDate":"1997-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1251-8069(97)89446-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"96603325","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: 8
Interface orienting by vibration 界面通过振动定向
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Chemistry-Astronomy Pub Date : 1997-10-01 DOI: 10.1016/S1251-8069(97)80068-1
Dmitri V. Lyubimov , Anatoly A. Cherepanov , Tatiana P. Lyubimova , Bernard Roux
{"title":"Interface orienting by vibration","authors":"Dmitri V. Lyubimov ,&nbsp;Anatoly A. Cherepanov ,&nbsp;Tatiana P. Lyubimova ,&nbsp;Bernard Roux","doi":"10.1016/S1251-8069(97)80068-1","DOIUrl":"10.1016/S1251-8069(97)80068-1","url":null,"abstract":"<div><p>This paper concerns the influence of high frequency vibrations on interfaces (free surface of a fluid, interface of two immiscible fluids, surface of a solid body immersed in a liquid). Such interfaces are described by different equations and boundary conditions, but in all the cases they are oriented perpendicularly to the vibration axis.</p></div>","PeriodicalId":100304,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Chemistry-Astronomy","volume":"325 7","pages":"Pages 391-396"},"PeriodicalIF":0.0,"publicationDate":"1997-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1251-8069(97)80068-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"112754070","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
首页 上一页
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