Modulus of Toughness | How is it calculated ?

Toughness is the property due to which the material can withstand impact loading without fracture. Modulus of toughness quantifies this toughness. 

What is toughness?

Let us understand what toughness means in common usage; When we say someone is tough, it means that they are strong enough to withstand rough conditions. The same applies to materials also.

 

Toughness is the property due to which the material can withstand impact loading without fracture (At fracture, it breaks!). If the material can take more strain without undergoing fracture then it will be the tougher material. 

Modulus of Toughness

​Modulus of toughness quantifies this toughness. It is the area under the stress-strain curve upto fracture point. It can also be defined as the strain energy stored per unit volume of the material upto fracture.

  • Ductile material can take more strain upto the fracture point than the brittle material

  • Mild steel is tougher than Cast iron because of this reason
     

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