Answer: Hooke’s Law is valid for the linear part of the stress-strain curve.
Hooke’s law states that for small deformations, stress is directly proportional to the strain for many materials. The constant of proportionality is called the modulus of elasticity. The elastic behavior of objects can be described by three elastic moduli such as Young’s modulus, Shear modulus, and Bulk modulus. The solids that do not obey Hooke’s law are called elastomers.
Details on terms related to Hooke’s Law
Following are the terms and their explanation that are used while describing Hooke’s Law:
The point of elastic limit on the stress-strain curve is called the yield point.
The corresponding stress is known as yield strength.
The ratio of tensile stress (σ) to the longitudinal strain (ε) is defined as Young’s modulus. It is denoted by the symbol Y.
The ratio of stress and strain is called the modulus of elasticity.
Tensile Strength, Elastic Limit and Young’s Modulus for some materials have been elaborated in the table given below.
Hooke’s Law is valid for
It is valid for the area of the curve between the origin and the yield point. It was given by Robert Hooke who was one of the most brilliant and versatile English scientists in the seventeenth century.