In general, all the materials used by the engineers, may be classified, on the basis of their physical properties, into the following four types:
1) Elastic materials : When a material regains its original position, on the removal of the external force, it is called an elastic material.
2) Plastic materials : When a material doesn't not regain its original position, on the removal of the external force, it is called a plastic materials.
3) Ductile materials : When a material can undergo a considerable deformation without rupture (e.g. when a material can be drawn into wires), it is called a ductile material.
4) Brittle material : When a material cannot undergo any deformation ( like glass) and it fails by rupture, it is called a brittle material.
1) Elastic materials : When a material regains its original position, on the removal of the external force, it is called an elastic material.
2) Plastic materials : When a material doesn't not regain its original position, on the removal of the external force, it is called a plastic materials.
3) Ductile materials : When a material can undergo a considerable deformation without rupture (e.g. when a material can be drawn into wires), it is called a ductile material.
4) Brittle material : When a material cannot undergo any deformation ( like glass) and it fails by rupture, it is called a brittle material.
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