Question

2.2: Highest value of stress for which Hooke's law is applicable for a given material is called​

Answer 1

Answer:

The constant of proportionality is called the elastic modulus or Young's modulus. If has the same units as stress. Y is a property of the material used. Hooke's law holds up to a maximum stress called the proportional limit.

Answer 2

Proportional limit.

• Hooke's law is valid when the stress is proportional to the strain, which is only within the proportionality limit.

• The Stress and strain takes different forms in different situations. Generally, for little deformations, the stress and strain are proportional to each other, and this is called Hooke's Law.

• Hooke's law states that strain of the material is proportional to a applied stress within the elastic limit of that material.

• Hooke's law itself states that it is valid only up to the elastic range of the material I.e. only to the limit that where the materials are behaving elastically.

• The proportional limit is a point on stress-strain curve where a  linear, elastic deformation region transits into a non-linear, plastic deformation region. Also, the proportionality limit that determines the greatest stress that is directly proportional to strain.

Therefore the highest value of stress for which Hooke's law is applicable for a given material is called​ the Proportional limit.

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