plastic flow

noun
deformation of a material that remains rigid under stresses of less than a certain intensity but that behaves under severer stresses approximately as a Newtonian fluid.
Also called plastic deformation.


Origin:
1875–80

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Example sentences
Deep ruts can also result from lateral plastic flow of the mixture from the
  wheel tracks.
The plastic flow is thus carried out under certain applied loading conditions
  such as constant strain rates.
Plastic flow chambers will be calibrated to field measured flow regimes.
As a result, yielding parallel to the grain does not induce plastic flow
  perpendicular to the grain.
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