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

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Modulations d'amplitude dans l'interaction onde solitaire interne-houle. Expériences 单波内波相互作用中的振幅调制。实验
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy Pub Date : 1999-12-01 DOI: 10.1016/S1287-4620(99)90009-1
Katell Guizien, Éric Barthélemy
{"title":"Modulations d'amplitude dans l'interaction onde solitaire interne-houle. Expériences","authors":"Katell Guizien,&nbsp;Éric Barthélemy","doi":"10.1016/S1287-4620(99)90009-1","DOIUrl":"10.1016/S1287-4620(99)90009-1","url":null,"abstract":"<div><p>Interaction experiments between an internal solitary wave and a monochromatic surface wave have been carried out in a salted stratified medium. Strong (resp. weak) interactions showed that surface wave amplitude decreases (resp. increases) were much larger than predicted by wave action conservation applied to the refraction on slowly varying currents.</p></div>","PeriodicalId":100303,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy","volume":"327 13","pages":"Pages 1325-1330"},"PeriodicalIF":0.0,"publicationDate":"1999-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1287-4620(99)90009-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81030392","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
Étude de la résonance du mode géostrophique dans un tore 环面中地转模共振的研究
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy Pub Date : 1999-12-01 DOI: 10.1016/S1287-4620(00)87510-9
Jérôme Adou
{"title":"Étude de la résonance du mode géostrophique dans un tore","authors":"Jérôme Adou","doi":"10.1016/S1287-4620(00)87510-9","DOIUrl":"10.1016/S1287-4620(00)87510-9","url":null,"abstract":"<div><p>We show that when (ΩR/c<sub><em>0</em></sub>) ≪ <em>1</em>, and (a/R) ≪ <em>1</em>, the air motion in a torus is governed by the problem of inertial oscillations in this torus excited by a perturbation on its surface, which moves with constant angular velocity Ω and gets recurrently at the same place with period <em>2π/Ω</em>. This excitation makes one of the inertial oscillation modes enter in resonance, the geostrophic mode, which increases proportionally to time when t → ∞.</p></div>","PeriodicalId":100303,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy","volume":"327 14","pages":"Pages 1391-1396"},"PeriodicalIF":0.0,"publicationDate":"1999-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1287-4620(00)87510-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90597330","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
Estimations homogénéisées pour les composites hyperélastiques et applications aux élastomères renforcés 超弹性复合材料的均质估计和增强弹性体的应用
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy Pub Date : 1999-12-01 DOI: 10.1016/S1287-4620(99)90005-4
Pedro Ponte Castañeda, Emilio Tiberio
{"title":"Estimations homogénéisées pour les composites hyperélastiques et applications aux élastomères renforcés","authors":"Pedro Ponte Castañeda,&nbsp;Emilio Tiberio","doi":"10.1016/S1287-4620(99)90005-4","DOIUrl":"10.1016/S1287-4620(99)90005-4","url":null,"abstract":"<div><p>This Note is concerned with the development of variational estimates for the effective stored-energy function of hyperelastic composites undergoing finite deformations. It makes use of a suitable generalization of the “second-order procedure” of Ponte Castañeda, the key idea being the introduction of an optimally chosen “linear thermoelastic comparison composite”, which can then be used to convert available homogenization estimates for linear systems directly into new estimates for hyperelastic composites. The resulting estimates are known to be exact to second order in the contrast. An application is given for particle-reinforced rubbers.</p></div>","PeriodicalId":100303,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy","volume":"327 13","pages":"Pages 1297-1304"},"PeriodicalIF":0.0,"publicationDate":"1999-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1287-4620(99)90005-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77791314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Vitesse de chute d'une particule lourde isolée dans un écoulement turbulent 单个重粒子在湍流中的下落速度
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy Pub Date : 1999-12-01 DOI: 10.1016/S1287-4620(00)87508-0
Sophie Cadiergue, Nathalie Michaux-Leblond, Michel Bélorgey
{"title":"Vitesse de chute d'une particule lourde isolée dans un écoulement turbulent","authors":"Sophie Cadiergue,&nbsp;Nathalie Michaux-Leblond,&nbsp;Michel Bélorgey","doi":"10.1016/S1287-4620(00)87508-0","DOIUrl":"10.1016/S1287-4620(00)87508-0","url":null,"abstract":"<div><p>The settling velocity of isolated spherical particles, in grid generated turbulence, points out the role of the vortex structures in sediment process. The analysis of mean and turbulent velocities fields shows that the ratios between turbulence scales and characteristics of the particles are of great importance on the settling velocity evolution.</p></div>","PeriodicalId":100303,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy","volume":"327 14","pages":"Pages 1379-1384"},"PeriodicalIF":0.0,"publicationDate":"1999-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1287-4620(00)87508-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72615581","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
Rubriques 标题
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy Pub Date : 1999-12-01 DOI: 10.1016/S1287-4620(00)87518-3
{"title":"Rubriques","authors":"","doi":"10.1016/S1287-4620(00)87518-3","DOIUrl":"https://doi.org/10.1016/S1287-4620(00)87518-3","url":null,"abstract":"","PeriodicalId":100303,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy","volume":"327 14","pages":"Pages XXXVI-XXXVII"},"PeriodicalIF":0.0,"publicationDate":"1999-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1287-4620(00)87518-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137402798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Auteurs 作者
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy Pub Date : 1999-12-01 DOI: 10.1016/S1287-4620(00)87515-8
{"title":"Auteurs","authors":"","doi":"10.1016/S1287-4620(00)87515-8","DOIUrl":"https://doi.org/10.1016/S1287-4620(00)87515-8","url":null,"abstract":"","PeriodicalId":100303,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy","volume":"327 14","pages":"Pages X-XVIII"},"PeriodicalIF":0.0,"publicationDate":"1999-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1287-4620(00)87515-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137402781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Crack kinking from an initially closed interface crack 最初闭合的界面裂缝产生的裂缝扭结
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy Pub Date : 1999-12-01 DOI: 10.1016/S1287-4620(99)90007-8
Jean-Baptiste Leblond, Joël Frelat
{"title":"Crack kinking from an initially closed interface crack","authors":"Jean-Baptiste Leblond,&nbsp;Joël Frelat","doi":"10.1016/S1287-4620(99)90007-8","DOIUrl":"10.1016/S1287-4620(99)90007-8","url":null,"abstract":"<div><p>One studies crack kinking from an interface crack when this crack is closed prior to kinking but open after it. Contact is assumed to occur without friction. This problem was considered very recently by the authors in the special case of some homogeneous material (ordinary crack). One establishes the relation between the stress intensity factors just before and just after the kink. From there, and using Goldstein and Salganik's famous <em>principle of local symmetry</em>, one derives the value of the kink angle. This value is somewhat surprisingly found to depend only very weakly on the mismatch of elastic properties between the materials.</p></div>","PeriodicalId":100303,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy","volume":"327 13","pages":"Pages 1311-1318"},"PeriodicalIF":0.0,"publicationDate":"1999-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1287-4620(99)90007-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74377024","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: 4
Fatigue propagation path of 3D plane cracks under mode I loading I型加载下三维平面裂纹的疲劳扩展路径
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy Pub Date : 1999-12-01 DOI: 10.1016/S1287-4620(99)90008-X
Véronique Lazarus
{"title":"Fatigue propagation path of 3D plane cracks under mode I loading","authors":"Véronique Lazarus","doi":"10.1016/S1287-4620(99)90008-X","DOIUrl":"10.1016/S1287-4620(99)90008-X","url":null,"abstract":"<div><p>The fatigue growth path of an arbitrary plane crack, loaded by some remote tensile uniform stress, is computed using a perturbation method derived from the three-dimensional weight-function theory of Rice (1985, 1989). First, the stress intensity factor and the weight function of the initial front are calculated. Then, the crack advance is determined by applying Paris' law. One advantage of the method is that only the meshing of the initial <em>front</em> is needed, allowing for the study of propagation on a large scale.</p></div>","PeriodicalId":100303,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy","volume":"327 13","pages":"Pages 1319-1324"},"PeriodicalIF":0.0,"publicationDate":"1999-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1287-4620(99)90008-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75027014","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: 7
Dry vortices in thin helium films 氦薄膜中的干涡
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy Pub Date : 1999-12-01 DOI: 10.1016/S1287-4620(99)90011-X
Pierre-Gilles De Gennes
{"title":"Dry vortices in thin helium films","authors":"Pierre-Gilles De Gennes","doi":"10.1016/S1287-4620(99)90011-X","DOIUrl":"10.1016/S1287-4620(99)90011-X","url":null,"abstract":"<div><p>A very thin superfluid film on a weakly attractive surface (such as rubidium metal) should display an unusual vortex structure, with a dry core larger than the standard core radius λ. In this structure, the capillary energies are slightly increased, but the vortex kinetic energy is reduced.</p></div>","PeriodicalId":100303,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy","volume":"327 13","pages":"Pages 1337-1343"},"PeriodicalIF":0.0,"publicationDate":"1999-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1287-4620(99)90011-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74772848","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
Nouvelles régularités très significatives dans les observations interférométriques de Dayton C. Miller 1925–1926 代顿·c·米勒1925 - 1926年干涉观测中非常重要的新规律
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy Pub Date : 1999-12-01 DOI: 10.1016/S1287-4620(00)87513-4
Maurice Allais
{"title":"Nouvelles régularités très significatives dans les observations interférométriques de Dayton C. Miller 1925–1926","authors":"Maurice Allais","doi":"10.1016/S1287-4620(00)87513-4","DOIUrl":"https://doi.org/10.1016/S1287-4620(00)87513-4","url":null,"abstract":"<div><p>The overall representation of the four elliptical hodographs corresponding to Miller's observations reveals remarkable regularities. The centres of the hodographs are located on a circle and for each sidereal time the points corresponding to Miller's four dates are themselves located on a circle. The gaps in relation to these circles are very slight in relative terms. These regularities confirm the existence of a very coherent structure subjacent to Miller's observations.</p></div>","PeriodicalId":100303,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy","volume":"327 14","pages":"Pages 1411-1418"},"PeriodicalIF":0.0,"publicationDate":"1999-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1287-4620(00)87513-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137402794","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
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