
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 79Apr 84,
Corporate Author : UNIVERSITY OF EAST ANGLIA NORWICH (ENGLAND) SCHOOL OF MATHEMATICS AND PHYSICS
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 nonlinear 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 strainrate response, are reviewed, showing that the latter are sensitive to kernel detail. An alternative stress formulation which is determined by constant strainrate response is constructed, and it is shown that the predicted strain and strainrate 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
Mechanics
Distribution Statement : APPROVED FOR PUBLIC RELEASE