Question

4. Represent graphically stress-strain curve for a material of a wire. On the graph mark : (a) Hooke's law region (b) Elastic limit (c) Permanent set (d) Fracture point.

Answer 1

Explanation:

By now, we know that the stress and strain take different forms in different situations. In this article, we will understand the relationship between stress and strain by looking at the Hooke’s law and the stress-strain curve.

Hooke’s Law

Hooke’s Law states that for small deformities, the stress and strain are proportional to each other. Thus,

Stress

∝

Strain

Or, Stress = k × Strain … where k is the constant of proportionality and is the Modulus of Elasticity. It is important to note that Hooke’s Law is valid for most materials.

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