Subject: Machine Design -I

Topic: Machine Design consideration

Difficulty: Medium

The mechanical properties of materials are the properties that describe the behavior of the material under the action of external forces.

List of mechanical Properties:

(1) Strength

(2) Elasticity

(3) Plasticity

(4) Stiffness

(5) Resilience

(6) Toughness

(7) Malleability

(8) Ductility

(9) Brittleness

(10) Hardness

1. Strength: It is defined as the ability of the material to resist, without rupture, external forces causing various types of stresses.
2. Elasticity: It is defined as the ability of the material to regain its original shape and size after the deformation, when the external forces are removed.
3. Plasticity: is defined as the ability of the material to retain the deformation produced under the load on a permanent basis.
4. Stiffness: It is defined as the ability of the material to resist deformation under the action of an external load.
5. Resilience: It is defined as the ability of the material to absorb energy when deformed elastically and to release this energy when unloaded.
6. Toughness: It is defined as the ability of the material to absorb energy before fracture takes place.
7. Malleability: It is defined as the ability of a material to deform to a greater extent before the sign of crack, when it is subjected to compressive force.
8. Ductility: It is defined as the ability of a material to deform to a greater extent before the sign of crack, when it is subjected to tensile force.
9. Brittleness: It is the property of a material which shows negligible plastic deformation before fracture takes place.
10. Hardness: It is defined as the resistance of the material to penetration or permanent deformation.