While loading, _______ material undergoes fracture after large amount of deformation.
Right Answer is:
A fracture means the separation of solid material, under the action of stress, into two or more parts. Fracture results in the creation of new surfaces.
Fractures are also classified on the basis of the crystallographic mode of fracture and the appearance of the fracture. Based on the crystallographic mode of fracture, fractures are known as a shear fracture or cleavage fracture, whereas on the basis of appearance, fractures are referred to as fibrous or granular fracture. A fibrous fracture is usually dull in appearance while a granular fracture is usually bright in appearance.
A ductile material undergoes large plastic deformation as a result of extensive slip-on active slip planes.
The fracture that is preceded by the slip is popularly known as a shear fracture. Such a fracture, as the name implies, is caused by shear stresses.
Since no or little plastic deformation by slip is exhibited by brittle materials, shear fracture is observed in ductile materials only.