Rheology is science of flow, of deformation of liquids and solids, and of the in-between viscoelastic materials, such as asphalt, glass, dough or plastics (polymers). The properties of the materials are described by the constitutive equation (rheological equation of state) which may an include other then mechanical quantities, such as magnetic or electrical fields. Constitutive equation describes the memory of materials, effects of thermal and stress history and effects such as hysteresis.
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Materials Science Modeling
Project at NIST, Applied and Computational Mathematics Division, US gov. institute.
The Origins of Rheology: A Short Historical Excursion
History and relationships with other areas of physics. [PDF]
Understanding of hydrocolloids.