IGB

Connexion

(Article of periodic en Anglais - 1982)

Document title

Basal stress concentrations due to abrupt changes in boundary conditions: a cause for high till concentration at the bottom of a glacier

Authors(s) and Affiliation(s)

HUTTER K. ; OLUNLOYO V. O. S. ;

Abstract

It is shown that for a Newtonian fluid and all investigated discontinuities of boundary data, square root singularities of the stresses will develop at the transition line. Asymptotic expressions for the basal stresses are derived. The explicit forms of these asymptotic expansions depend on the form of the spatial dependance of the sliding law and further more on the numerical values of the viscosity coefficient. It is, moreover argued that the stress concentrations are sufficiently pronounced to account for the removal of basal rock especially in regions of high cleavage concentrations, the details again depending upon the sliding coefficient.

Source

Article of periodic

published at : Annals of Glaciology Cambridge

Editor :

Millesime : 1982, vol. 2 [pp. 29-33]

Bibliographic references : 19 réf.

Language

Anglais

Refdoc record number (ud4) : 12450379 : Permanent link - XML version
Powered by Pxxo