Machine Design
Plastic flow in ductile materials

Has no effect on it
Lessens the seriousness of static loading stress concentration
Increases the seriousness of static loading stress concentration
Depends on other considerations

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Machine Design
The plasticity is the property of a material which enables it to

Regain its original shape after deformation when the external forces are removed
Retain deformation produced under load permanently
Draw into wires by the application of a tensile force
Resist fracture due to high impact loads

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