Accession Number : ADA141710

Title :   Ice Mechanics. Part 1. Integral Representations for the Viscoelastic Deformation of Ice. Part 2. Single Integral Representations in Ice Mechanics.

Descriptive Note : Final technical rept. Nov 79-Apr 84,


Personal Author(s) : Morland,L W ; Spring,U ; Williams,H T

PDF Url : ADA141710

Report Date : Apr 1984

Pagination or Media Count : 63

Abstract : Integral Representation for the Viscoelastic Deformation of Ice. Various single integral representations which describe non-linear viscoelastic response are examined with regard to the types of test required to determine the respective kernels. A strain formulation determined by constant uniaxial stress response typical of ice, and its predictions for constant strain-rate response, are reviewed, showing that the latter are sensitive to kernel detail. An alternative stress formulation which is determined by constant strain-rate response is constructed, and it is shown that the predicted strain and strain-rate responses at constant stress are compatible with the typical responses exhibited by ice. Single Integral Representations in Ice Mechanics. A single integral viscoelastic constitutive equation for ice is developed which possesses significant theoretical and practical advantages over previously suggested equations of this type (Spring and Morland, 1983). The theory is specialized to the case of small strain uniaxial compression and the resulting constitutive equation is shown to verify the relations between experimental data obtained in constant load (CL) creep tests and constant displacement rate (CD) 'strength' tests conjectured in Mellor and Cole (1982) and demonstrated in Mellor and Cole (1983). (Author)

Descriptors :   *Ice, *Viscoelasticity, *Deformation, Stress strain relations, Strain rate, Solids, Integrals

Subject Categories : Snow, Ice and Permafrost

Distribution Statement : APPROVED FOR PUBLIC RELEASE