W. Brostow, Time-stress correspondence in viscoelastic materials: an equation for the stress and temperature shift factor, MAT RES INN, 3(6), 2000, pp. 347-351
Stress-time correspondence principle discovered experimentally by O'Shaughn
essy already in 1948 [1] is considered. Using the Doolittle formula for the
viscosity as a function of free volume 12], an equation for the generalize
d temperature-stress shift factor a(T,sigma) is obtained. An equation for t
he stress-dependent shift factor a(sigma) follows as a special case. The eq
uation for the temperature shift factor a(T) already derived in 1985 [3] an
d successfully used since also follows from the a(T,sigma) formula.