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after the removal of load if the object regains its original position is called elastic deformation ....If the object cant regain its original position even after the removal of applied load is called plastic deformation...
1. Elastic Deformation 2. neglect structural weight I'd explain more but have Mechanics of Materials final in a couple hours.
elastic deformation
Torsion
elastic deformation, ductile deformation and fracture
Elastic deformation is recoverable deformation. As such, when the load that caused the deformation is removed the material will return to it's original shape.
Torsion means twisting or being twisted. Intestinal torsion can be fatal.
torsion
ductile deformation
Torsion strength measures the largest torsion force the material can withstand and still spring back into its original shape.
tor·sionn.1. The act of twisting or turning.2. The condition of being twisted or turned.2. The stress or deformation caused when one end of an object is twisted in one direction and the other end is held motionless or twisted in the opposite direction.Above retrieved from Answers.comViper1
it is deformation below recrystalization temperature.