Relationships between shear and squeeze linear viscoelastic moduli have been calculated assuming the fluid accomplishes with the Generalized Linear Viscoelastic Fluid constitutive equation. They only differ by a geometric factor determined by the squeeze tests, a result coinciding with that previously obtained by Wingstrand et al. (J Rheol 60:407–418, 2016) assuming the viscoelasticity of the fluid results from the use of a complex viscosity in the Generalized Newtonian Fluid constitutive equation. Three representative materials, i.e., honey (Newtonian), shampoo (viscoelastic liquid), and foam (viscoelastic solid), were experimentally tested to check the theoretical predictions. Despite it is not specifically designed for oscillatory squeeze tests, a texturometer was used after the repeatability of measurements in the frequency range \(\:0.1-10\:Hz\) was checked. Results were compared to those obtained with a stress-controlled shear rheometer, which were considered as reference values. The main conclusion of this research work is that the linear viscoelasticity of materials that are difficult to test adequately in rotational rheometers, can be studied by using squeeze oscillatory flow, no matter which constitutive equation governs their flow.
