Research Article
Logical Inference for Model-Based Reconstruction of Ultrasonic Nonlinearity
Table 1
Continuum mechanics variables, time, and space index derivative notation.
| | Quantity | Symbol | Units |
| | Space (in a Cartesian space) | | m | | Time | | s | | Particle displacement | | m | | Velocity | | m/s | | Velocity rate | | m/s2 | | Strain | | — | | Stress | | Pa | | Pressure | | Pa | | Lamé constants | , | Pa | | Volumetric constitutive nonlinearity | | — | | Density | | kg/m3 | | Shear and volumetric viscosity | , | Pa s = kg/ms |
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