Читать книгу The Rheology Handbook - Thomas Mezger - Страница 135

with the coefficients c1 [Pa] as 0th order coefficient, representing the yield point; c2 [Pa ⋅ s], as 1st order coefficient; c3 [Pa ⋅ s2], as 2nd order coefficient; c4 [Pa ⋅ s3], as 3rd order coefficient. If a second order polynomial is used for analysis, then the last term of the function is ignored. Polynomials of higher orders (e. g. 5th) show correspondingly more terms.

There are also polynomials which are solved to the shear rate:

γ ̇ = c1 ⋅ τ + c2 ⋅ τ2

with the coefficients c1 [1/Pas] and c2 [1/Pa2 ⋅ s]

A comparable model is the Steiger/Ory model (see Chapter 3.3.6.2b).