Measurements without Sample Inertia Effects

DYNAMIC MEASUREMENTS WITHOUT SAMPLE INERTIA EFFECTS 

Measurements on soft solids with sinusoidally varying deformations may be classified in the same way as those on liquids discussed in the preceding chapter. If the sample thickness is small compared with the wavelength of a shear wave, sample inertia effects nmy be neglected and the form factors defined in connection with Figs. 5-1 and 6-1 ran be used just as in transient measurements. 

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D. DYNAMIC (OSCILLATORY) MEASUREMENTS WITHOUT SAMPLE INERTIA EFFECTS ( GAP LOADING )... 

C. DYNAMIC MEASUREMENTS WITHOUT SAMPLE INERTIA EFFECTS... 

All the experimental geometries described in the preceding chapter and illustrated in Fig. 5-1 can be used for measurements of viscoelastic properties of soft solids, though confinement of the sample between coaxial cylinders is rather un-usuaF- because of the difficulty in Hlling. In addition, three other geometries which are common are sketched in Fig. 6-1. In creep, stress relaxation, and dynamic experiments without sample inertia effects, the shear (or simple extension) strain stress ratios can be obtained from displacement/force ratios by geometrical factors which supplement the list given in Chapter 5 as follows ... 

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