Rheological experiments are performed either by applying a small stress to the sample and measuring the strain developed or by applying a fixed amount of strain and measuring the developed stress.

Rheology refers to the study of flow and deformation of materials under imposed stress. The limitations of material behavior are the ideal (Hookean) solid, which is distinguished by an elastic modulus ...

When G', the modulus pertaining to elasticity, exceeds G", the viscous modulus related to flow, the material is said to have an associated structure, and therefore, a yield stress. In order that the ...