Bingham plastic
Material which is solid at low stress but becomes viscous at high stress / From Wikipedia, the free encyclopedia
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In materials science, a Bingham plastic is a viscoplastic material that behaves as a rigid body at low stresses but flows as a viscous fluid at high stress. It is named after Eugene C. Bingham who proposed its mathematical form.[1]
It is used as a common mathematical model of mud flow in drilling engineering, and in the handling of slurries. A common example is toothpaste,[2] which will not be extruded until a certain pressure is applied to the tube. It is then pushed out as a relatively coherent plug.