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Terms and explanations.
| terms | description |
|---|---|
| P | force |
| δ | displacement |
| t | time |
| T | normalized time constant |
| a | contact radius |
| R | tip radius |
| θ | semi-included angle of indenter |
| D | diffusivity |
| V | Poisson's ratio |
| K | permeability |
| η | viscosity |
| G | shear modulus |
| G∞ | equilibrium shear modulus |
| G0 | instantaneous shear modulus |
| E | Young's modulus |
| E∞ | equilibrium elastic modulus |
| E0 | instantaneous elastic modulus |
| HA | aggregate modulus |
| γ | surface energy |
