Many models that are compounded out from the rheologic response in rock deformation experimemts can be represented by mechanical models consisting of a sring (elastic substance), dashpot (viscous material) and weight (plastic substance). A Bingham substance (after granitic bodies in Bingham in Utah state, US) is one whose behaviour is pseudoviscous, which can be represented by a spring, a friction weight and a dashpot arranged in series. This behaviour is more or less like viscous or linear viscous, except that the linear relationship betwen stress and strain rate is reached only after the value of yield stress is reached. It differs from a plastic one in its being dependent on stress values and cannot occur at constant stress. Most of the diapiric granitic bodies, particularly in orogenic belts are emplaced as Bingham bodies or in "Solid state".

Many models that are compounded out from the rheologic response in rock deformation experimemts can be represented by mechanical models consisting of a sring (elastic substance), dashpot (viscous material) and weight (plastic substance). A Bingham substance (after granitic bodies in Bingham in Utah state, US) is one whose behaviour is pseudoviscous, which can be represented by a spring, a friction weight and a dashpot arranged in series. This behaviour is more or less like viscous or linear viscous, except that the linear relationship betwen stress and strain rate is reached only after the value of yield stress is reached. It differs from a plastic one in its being dependent on stress values and cannot occur at constant stress. Most of the diapiric granitic bodies, particularly in orogenic belts are emplaced as Bingham bodies or in "Solid state".

This graph shws the material behaviour between the Newtonian viscous and Bingham materials.