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

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Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Chemistry-Astronomy Pub Date : 1997-12-01 Epub Date: 2005-04-21 DOI: 10.1016/S1251-8069(97)80005-X
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引用次数: 0
A probabilistic approach for fragmentation of brittle materials under dynamic loading 动态载荷下脆性材料破碎的概率方法
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Chemistry-Astronomy Pub Date : 1997-12-01 Epub Date: 2000-03-05 DOI: 10.1016/S1251-8069(97)82333-0
Christophe Denoual , Gilles Barbier , François Hild
{"title":"A probabilistic approach for fragmentation of brittle materials under dynamic loading","authors":"Christophe Denoual ,&nbsp;Gilles Barbier ,&nbsp;François Hild","doi":"10.1016/S1251-8069(97)82333-0","DOIUrl":"10.1016/S1251-8069(97)82333-0","url":null,"abstract":"<div><p>Dynamic loadings produce high stress waves leading to the fragmentation of brittle materials such as ceramics. The main mechanism used to explain the change of the number of fragments with stress rate is an obscuration phenomenon. After the presentation of a probabilistic approach, the evolution of the number of nucleated flaws and a damage model are derived.</p></div>","PeriodicalId":100304,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Chemistry-Astronomy","volume":"325 12","pages":"Pages 685-691"},"PeriodicalIF":0.0,"publicationDate":"1997-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1251-8069(97)82333-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"110518378","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
Type-I superconductivity of protons and magnetic fields of pulsars 质子和脉冲星磁场的i型超导性
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Chemistry-Astronomy Pub Date : 1997-12-01 Epub Date: 2000-03-05 DOI: 10.1016/S1251-8069(97)82342-1
David M. Sedrakian , Armen Sedrakian , Gely F. Zharkov
{"title":"Type-I superconductivity of protons and magnetic fields of pulsars","authors":"David M. Sedrakian ,&nbsp;Armen Sedrakian ,&nbsp;Gely F. Zharkov","doi":"10.1016/S1251-8069(97)82342-1","DOIUrl":"10.1016/S1251-8069(97)82342-1","url":null,"abstract":"<div><p>The magnetic structure of neutron vortices in the superfluid cores of neutron stars is determined assuming that the proton condensate forms a type-I superconductor. It is shown that the entrainment currents induced by the neutron vortex circulation cause the proton superconductor to break into normal and superconducting domains of cylindrical form coaxial with the neutron vortex. The minimum of the energy functional corresponds to a tube radius <em>a</em>(0.1 – 0.5) <em>b</em>, where <em>b</em> is the outer radius of the neutron vortex. The magnetic field within the tube is of the order of 5 × 10<sup>14</sup> G.</p></div>","PeriodicalId":100304,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Chemistry-Astronomy","volume":"325 12","pages":"Pages 763-768"},"PeriodicalIF":0.0,"publicationDate":"1997-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1251-8069(97)82342-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"105848210","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
Couches limites interactives pour l'écoulement de Couette dans un canal indenté 用于在压痕通道中流动的被子的交互边界层
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Chemistry-Astronomy Pub Date : 1997-12-01 Epub Date: 2000-03-05 DOI: 10.1016/S1251-8069(97)82334-2
Laurent Plantié , Jacques Mauss
{"title":"Couches limites interactives pour l'écoulement de Couette dans un canal indenté","authors":"Laurent Plantié ,&nbsp;Jacques Mauss","doi":"10.1016/S1251-8069(97)82334-2","DOIUrl":"10.1016/S1251-8069(97)82334-2","url":null,"abstract":"<div><p>We propose here a systematic analysis of the boundary layer models describing the influence of a small geometrical perturbation of a wall on a Couette flow. The size scales of the boundary layer thickness and of the perturbation term of the longitudinal velocity are different for the boundary layer of the moving wall, whence the originality of this model.</p></div>","PeriodicalId":100304,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Chemistry-Astronomy","volume":"325 12","pages":"Pages 693-699"},"PeriodicalIF":0.0,"publicationDate":"1997-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1251-8069(97)82334-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"92472008","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
Partie scientifique 部分科学
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Chemistry-Astronomy Pub Date : 1997-12-01 Epub Date: 2000-03-05 DOI: 10.1016/S1251-8069(97)82343-3
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引用次数: 0
Céphéides: la relation période-luminosité 天竺葵:周期-光度关系
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Chemistry-Astronomy Pub Date : 1997-12-01 Epub Date: 2000-03-05 DOI: 10.1016/S1251-8069(97)82341-X
Jean-Philippe Beaulieu
{"title":"Céphéides: la relation période-luminosité","authors":"Jean-Philippe Beaulieu","doi":"10.1016/S1251-8069(97)82341-X","DOIUrl":"10.1016/S1251-8069(97)82341-X","url":null,"abstract":"<div><p>The Cepheids are relatively young, bright, periodic supergiant variable stars showing a correlation between their periods and luminosities. Since the beginning of the century the Cepheid Period -Luminosity relation has been the corner stone of distance determination, and of the measure of the correlation between the apparent relative expansion velocity to the relative distance (the Hubble constant, <em>H<sub>0</sub></em>). Using data obtained from the EROS project, we empirically found a small effect of metallicity on the Period-Luminosity relation which has important consequences for the inferred Cepheid distances and the determination of H<sub>0</sub>.</p></div>","PeriodicalId":100304,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Chemistry-Astronomy","volume":"325 12","pages":"Pages 749-761"},"PeriodicalIF":0.0,"publicationDate":"1997-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1251-8069(97)82341-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"104320938","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
Auteurs 作者
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Chemistry-Astronomy Pub Date : 1997-12-01 Epub Date: 2000-03-05 DOI: 10.1016/S1251-8069(97)82344-5
{"title":"Auteurs","authors":"","doi":"10.1016/S1251-8069(97)82344-5","DOIUrl":"https://doi.org/10.1016/S1251-8069(97)82344-5","url":null,"abstract":"","PeriodicalId":100304,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Chemistry-Astronomy","volume":"325 12","pages":"Pages VII-XI"},"PeriodicalIF":0.0,"publicationDate":"1997-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1251-8069(97)82344-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137124944","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
Modélisation du soufflage de gaine 管道吹制模型
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Chemistry-Astronomy Pub Date : 1997-12-01 Epub Date: 2000-03-05 DOI: 10.1016/S1251-8069(99)80060-8
Jean-Marc André , Yves Demay , Jean-François Agassant
{"title":"Modélisation du soufflage de gaine","authors":"Jean-Marc André ,&nbsp;Yves Demay ,&nbsp;Jean-François Agassant","doi":"10.1016/S1251-8069(99)80060-8","DOIUrl":"10.1016/S1251-8069(99)80060-8","url":null,"abstract":"<div><p>The polymer film blowing process has been extensively studied in the literature. In most of the numerical models, the freezing line is arbitrarily fixed. In our anisothermal Newtonian and viscoelastic models, the freezing line is not set but results from the sharp increase of the viscosity. A precise computation of the bubble shape requires a careful determination of the initial angle of the bubble at the die exit. This has not been achieved yet. The existence of multiple solutions for the bubble and of an unattainable zone are underlined in the viscoelastic case.</p></div>","PeriodicalId":100304,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Chemistry-Astronomy","volume":"325 11","pages":"Pages 621-629"},"PeriodicalIF":0.0,"publicationDate":"1997-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1251-8069(99)80060-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89574588","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
Théorie de la fonctionnelle de la densité avec spin. VIII. Équation d'Euler-Lagrange pour f(r) 自旋密度函数理论。八。f(r)的欧拉-拉格朗日方程
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Chemistry-Astronomy Pub Date : 1997-12-01 Epub Date: 2000-03-05 DOI: 10.1016/S1251-8069(97)82337-8
Rossen L. Pavlov , Yavor I. Delchev , Alexander I. Kuleff , Jean Maruani
{"title":"Théorie de la fonctionnelle de la densité avec spin. VIII. Équation d'Euler-Lagrange pour f(r)","authors":"Rossen L. Pavlov ,&nbsp;Yavor I. Delchev ,&nbsp;Alexander I. Kuleff ,&nbsp;Jean Maruani","doi":"10.1016/S1251-8069(97)82337-8","DOIUrl":"10.1016/S1251-8069(97)82337-8","url":null,"abstract":"<div><p>In the previous paper we expressed the Euler-Lagrange variational equation for the non-relativistic energy of spin multiplicities of a multifermionic system, implicit in the charge distribution ρ(<strong>r</strong>), and showed how to solve it iteratively — and derive optimal values of observables, including the spin distribution σ(<strong>r</strong>) — through using the scalar function f(<strong>r</strong>) of the local-scaling transformation of the orbit. In the present paper we derive a similar equation, more explicit but also more complex, for the total energy expressed as a functional of f(<strong>r</strong>), and compare the problems raised by the different approaches.</p></div>","PeriodicalId":100304,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Chemistry-Astronomy","volume":"325 12","pages":"Pages 719-726"},"PeriodicalIF":0.0,"publicationDate":"1997-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1251-8069(97)82337-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"101713041","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
Oscillations anharmoniques dans les puits de cavités souterraines 地下竖井的非谐波振荡
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Chemistry-Astronomy Pub Date : 1997-12-01 Epub Date: 2000-03-05 DOI: 10.1016/S1251-8069(97)82335-4
Pierre Bérest, Jean Bergues, Benoît Brouard
{"title":"Oscillations anharmoniques dans les puits de cavités souterraines","authors":"Pierre Bérest,&nbsp;Jean Bergues,&nbsp;Benoît Brouard","doi":"10.1016/S1251-8069(97)82335-4","DOIUrl":"10.1016/S1251-8069(97)82335-4","url":null,"abstract":"<div><p>Strongly anharmonic pressure oscillations generated by fluid injection stops have been observed at the well head of an underground cavern. They are due to a small gas pocket, trapped in the well head, whose existence was unknown.</p></div>","PeriodicalId":100304,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Chemistry-Astronomy","volume":"325 12","pages":"Pages 701-707"},"PeriodicalIF":0.0,"publicationDate":"1997-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1251-8069(97)82335-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"102238479","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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