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Knowledge card

The Eyring parameter uses the constitutive shear scale ς

The dimensionless parameter is ε = 1/(μ_fβς). Replacing the Powell–Eyring shear-rate constant ς by the unrelated stretching rate c changes the material law even though both happen to have units s⁻¹.

Dimension I

Definition

What it is — and what it is not

What it is
  • S1Correction and justification — The dimensionless parameter is ε = 1/(μ_fβς). Replacing the Powell–Eyring shear-rate constant ς by the unrelated stretching rate c changes the material law even though both happen to have units s⁻¹. [1.1]

Dimension II

In practice

How to deal with it

No practical guidance recorded yet.

Applies pattern

References

  1. Powell & Eyring (1944), Nature

    • 1.1

      Constitutive stress law and material scales — The dimensionless parameter is ε = 1/(μ_fβς). Replacing the Powell–Eyring shear-rate constant ς by the unrelated stretching rate c changes the material law even though both happen to have units s⁻¹.

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