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plastic deformation

   Also found in: Dictionary/thesaurus, Medical, Legal, Wikipedia 0.01 sec.
plastic deformation [′plas·tik ‚dē‚fȯr′mā·shən]
(mechanics)
Permanent change in shape or size of a solid body without fracture resulting from the application of sustained stress beyond the elastic limit.

plastic flow, plastic deformation
The deformation of a plastic material beyond the point of recovery, accompanied by continuing deformation with no further increase in stress; results in a permanent change in shape.


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Plastic deformation usually doesn't change the grain structure of the metal structure.
These are then used to make a model for the elastic response of PC, using a model for stress that depends on both the elastic and plastic deformation gradients.
It is likely that the acceleration observed in this failure mode is in part due to the slowly accumulating plastic deformation of the dielectric material in response to thermal cycles.
 
 
 
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