Premium
STRESS RELAXATION BEHAVIOUR OF FROZEN SUCROSE SOLUTIONS
Author(s) -
XU X.,
JERONIMIDIS G.,
ATKINS A.G.,
TRUSTY P.A.
Publication year - 2004
Publication title -
journal of texture studies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.593
H-Index - 54
eISSN - 1745-4603
pISSN - 0022-4901
DOI - 10.1111/j.1745-4603.2004.tb00820.x
Subject(s) - creep , stress relaxation , sucrose , relaxation (psychology) , materials science , steady state (chemistry) , exponent , indentation , thermodynamics , crystallite , stress (linguistics) , constant (computer programming) , composite material , metallurgy , chemistry , physics , biochemistry , medicine , linguistics , philosophy , computer science , programming language
The stress relaxation behaviour of two frozen sucrose solutions (7% and 19%) during indentation in the temperature range of ‐20C to ‐40C were investigated. The stress relaxation is similar to that of pure polycrystalline ice, which is controlled by steady‐state creep. The steady state creep rate exponent , m, of 7% and 19% sucrose solutions lies between 2.3 and 3.6. The steady state creep rate constant , B, of 19% sucrose solution is greater than that of 7% sucrose solution. It is suggested that the steady‐state creep rate exponent m depends on contributions from the proportions of favourably oriented grains, unfavourably oriented grains and grain boundaries to creep and that these components depend on the value of internal stress which is related to the hardness of samples at the different testing temperatures. The steady‐state creep rate constant B depends on the mobility of dislocations in sucrose solutions which, in turn, depends on the temperature and the concentration of sucrose.