Around practice, rheology is primarily caring using extending a "classical" disciplines of elasticity and Newtonian fluid mechanics to more complicated materials. Rheology unites a on the face of it unrelated fields of plasticity and non-Newtonian fluids by recognising that both these types of materials come unable to trend lines the shear stress in static equilibrium. Therein feel, the plastic solid is a fluid. Granulose rheology refers to the motion of granular materials.

One of a tasks of rheology is to by trial and error establish a relationships between deformations and stresses, respectively their derivatives by adequate measurements. These experimental techniques come referred to as rheometry. Such relationships come so amenable to mathematical coarse of action per constituted methods of continuum mechanics.

Rheology has significant applications around engineering, geophysics and physiology. Particularly, hemorheology is the study of the properties of blood flow. Inside geology, solid Earth materials that exhibit viscous flow over age scales come referred to as rheids.