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Titre du document / Document title

The effects of sulfuric acid on the mechanical properties of ice single crystals

Auteur(s) / Author(s)

TRICKETT Y. L. (1) ; BAKER I. (1) ; PRADHAN P. M. S. (1) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Thayer School of Engineering, Dartmouth College, Hanover, New Hampshire 03755, ETATS-UNIS

Résumé / Abstract

Ice single crystals of various orientations containing various concentrations of H2SO4 up to 11.5 ppm were cut from large pucks of laboratory-grown ice. Constant-strain-rate compression tests were performed on the doped ice crystals both at -20°C at an axial strain rate of 1 × 10-5 s-1 and at -10°C at 1 × 10-6 s-1. The stress--strain curves showed a linearly rising stress with increasing strain, followed by a sharply declining stress after reaching a peak. With further strain, the sharp decline in stress slowed. The tests clearly showed, for the first time, that this naturally occurring impurity dramatically decreases both the peak stress and the subsequent flow stress of ice single crystals. The decrease in the peak strength was related to the square root of the concentration of H2SO4 up to 11.5 ppm, suggesting that the solubility limit of H2SO4 in ice is at least 11.5 ppm. The sulfuric acid also appeared to increase the ductility of the ice. Preliminary examination of a doped ice single crystal by synchrotron X-ray topography suggested that sulfuric acid dramatically increases the grown-in dislocation density.

Revue / Journal Title

Journal of Glaciology    ISSN  0022-1430   CODEN JOGLAO 

Source / Source

2000, vol. 46, no153, pp. 239-243 (23 ref.)

Langue / Language

Anglais

Editeur / Publisher

International Glaciological Society, Cambridge, ROYAUME-UNI  (1947) (Revue)

Mots-clés anglais / English Keywords

Ice crystals

;

Single crystal

;

Mechanical properties

;

Sulfuric acid

;

Compression test

;

Stress strain relation

;

Strain rate

;

Flow stress

;

Solubility

;

Ductility

;

X ray topography

;

Laboratory study

;

Experimental study

;

Mots-clés français / French Keywords

Cristal glace

;

Monocristal

;

Propriété mécanique

;

Sulfurique acide

;

Essai compression

;

Relation contrainte déformation

;

Vitesse déformation

;

Contrainte écoulement

;

Solubilité

;

Ductilité

;

Topographie RX

;

Etude en laboratoire

;

Etude expérimentale

;

Mots-clés espagnols / Spanish Keywords

Cristal hielo

;

Monocristal

;

Propiedad mecánica

;

Sulfúrico ácido

;

Ensayo compresión

;

Relación tensión deformación

;

Velocidad deformación

;

Tensión flujo

;

Solubilidad

;

Ductilidad

;

Topografía RX

;

Estudio en laboratorio

;

Estudio experimental

;

Localisation / Location

INIST-CNRS, Cote INIST : 5524, 35400009292179.0080

Nº notice refdoc (ud4) : 787615



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