Write down any 8 mechanical properties of materials
Answers
Yield (or Proof Strength) ...
Ultimate Tensile Strength (UTS) ...
Ductility. ...
The relastionship between stress and strain (load and elongation) ...
Hardness. ...
Toughness. ...
Fatigue Strength and Endurance Limit.
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mechanical properties of materials:
(1) Elasticity:
This is a measure of elastic deformation of a body under stress which is recovered when the stress is released
(2) Proof Strength:
Stress needed to produce a specified amount of plastic or permanent deformation.
(3) Ultimate Tensile Strength:
The maximum stress a material can withstand before fracture
(4) Ductility:
The amount of plastic deformation that a material can withstand without fracture.
(5) Hardness:
The resistance to abrasion, deformation, scratching or to indentation by another hard body. This property is important for wear resistant applications.
(6) Toughnes:
This is commonly associated with impact loading. It is defined as the energy required to fracture a unit volume of material. Generally, the combination of a high UTS and a high ductility results in a higher toughness.
(7) Fatigue Strength and Endurance Limit:
Fatigue failure results from a repeated cyclic application of stress which may be below the yield strength of the material.
(8) Creep Resistance:
The plastic deformation of a material which occurs as a function of time when the material is subjected to constant stress below its yield strength.
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