Article

Access to the text (HTML) Access to the text (HTML)
PDF Access to the PDF text
Advertising


Access to the full text of this article requires a subscription.
  • If you are a subscriber, please sign in 'My Account' at the top right of the screen.

  • If you want to subscribe to this journal, see our rates

  • You can purchase this item in Pay Per ViewPay per View - FAQ : 30,00 € Taxes included to order
    Pages Iconography Videos Other
    12 0 0 0


Comptes Rendus Physique
Volume 5, n° 7
pages 687-698 (septembre 2004)
Doi : 10.1016/j.crhy.2004.09.001
Dislocations and plasticity in ice
Dislocations et plasticité dans la glace.
 

François Louchet
LTPCM/ENSEEG, INP de Grenoble, BP 75, 38402 St Martin d'Hères cedex, France 

*Present address: Laboratoire de glaciologie et de géophysique de l'environnement, CNRS, BP 96, 38402 St Martin d'Hères cedex, France.
Abstract

Possible dislocation Burgers vectors and core structures in ice are discussed, and compared with those in crystals with closely related structures such as semiconductors. Theoretical expressions for dislocation velocities are given, on the basis of microscopic mechanisms in dislocation cores, implicitly including the possible role of protonic disorder and core reconstruction. Macroscopic plastic properties are then examined, such as, for instance, the stress dependence of the strain rate, discussed in terms of dislocation density evolution, and the scale invariance of dislocation avalanches, as shown by acoustic emission. To cite this article: F. Louchet, C. R. Physique 5 (2004).

The full text of this article is available in PDF format.
Résumé

Nous discutons les différents vecteurs de Burgers et structures de coeur des dislocations dans la glace, en référence à ceux de cristaux ayant des structures très proches comme les semiconducteurs. Nous donnons des expressions théoriques pour les vitesses de dislocations, basées sur les mécanismes microscopiques dans le coeur des dislocations, incluant implicitement un rôle possible du désordre protonique et de la reconstruction du coeur. Les propriétés macroscopiques sont ensuite examinées, comme la dépendance en contrainte de la vitesse de déformation, discutée en termes d'évolution des densités de dislocations, et l'invariance d'échelle des avalanches de dislocations, mises en évidence par émission acoustique. Pour citer cet article : F. Louchet, C. R. Physique 5 (2004).

The full text of this article is available in PDF format.

Keywords : Ice, Plasticity, Creep, Dislocations, Protonic disorder, Lattice friction

Mots-clés : Glace, Plasticité, Fluage, Dislocations, Désordre protonique, Friction de réseau




© 2004  Académie des sciences@@#104156@@
EM-CONSULTE.COM is registrered at the CNIL, déclaration n° 1286925.
As per the Law relating to information storage and personal integrity, you have the right to oppose (art 26 of that law), access (art 34 of that law) and rectify (art 36 of that law) your personal data. You may thus request that your data, should it be inaccurate, incomplete, unclear, outdated, not be used or stored, be corrected, clarified, updated or deleted.
Personal information regarding our website's visitors, including their identity, is confidential.
The owners of this website hereby guarantee to respect the legal confidentiality conditions, applicable in France, and not to disclose this data to third parties.
Close
Article Outline
You can move this window by clicking on the headline
@@#110903@@