Question

The total area under stress – strain curve represents?

• A. Malleability
• B. Toughness
• C. Resilience
• D. Fracture strength

Hint:

Toughness can be understood as the area under the entire stress-strain curve, representing a material's capacity to absorb energy before fracturing.

Answer 1

The Correct Option is B

The total area under the stress-strain curve represents the toughness of a material. Toughness is the ability of a material to absorb energy and plastically deform without fracturing. In the stress-strain curve, the area under the curve up to the fracture point represents the energy absorbed per unit volume of the material. This energy absorption capability is referred to as toughness.
- Malleability refers to the ability of a material to undergo significant plastic deformation before rupture, but it is not represented by the area under the stress-strain curve.
- Resilience refers to the ability of a material to absorb energy when deformed elastically and release that energy upon unloading. The area under the elastic portion of the curve represents resilience, not the entire area.
- Fracture strength is the maximum stress a material can withstand before it fractures but is not represented by the total area under the curve.
Thus, the correct answer is Toughness.