Which of the following stresses is known as the breaking stress of a material?

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The stress in a material after fracture happens.

The maximum amount of tensile stress that the material can withstand before failure, such as breaking or permanent deformation.

The maximum amount of tensile stress that the material can withstand before the elastic limit.

The maximum amount of tensile stress that the material can withstand in the elastic limit region.

answer is B.

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Detailed Solution

Concept- Here, we will proceed by remembering the stress-strain curve of any material, which will aid in defining each of the stresses given in the problem's alternatives. This gives us the definition of a material's breaking stress.
Fracture strength or fracture stress, according to the definition, is the stress in a material at which a specimen fails by fracture. This is the stress in a material after it has fractured. As a result, the stress represented by option A indicates fracture stress of a material rather than breaking stress of a material.
The breaking stress of a material is defined as the highest amount of tensile stress that the material can sustain before failure, such as breaking or permanent deformation.
Breaking stress is a tensile stress limiting state that causes tensile failure when the tension in a body exceeds the breaking stress of the material from which the body is constructed.
Hooke's rule indicates that the stress applied is directly proportional to the strain created in the body as a result of that stress, hence the highest amount of tensile stress that the material can endure before the elastic limit is known as yield stress. As a result, the stress indicated by option C indicates the yield stress of a material rather than the breaking stress of a material.
In addition, the yield stress of a material is the highest amount of tensile stress that it can withstand in the elastic limit zone. As a result, the stress indicated by option D indicates the yield stress of a material rather than the breaking stress of a material.
Hence, the correct answer is 2.

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