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Hooke’s Law

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Hooke's Law and Young's Modulus and Poisson's Ratio

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Hooke’s law:

Robert Hook found that within the elastic limit, the stress is directly proportional to strain. Thus we have

Stress`prop`strain

or

Stress = K.strain

where k is the constant of proportionality called 'Elastic Modulus' of the material.

According to Hooke’s law, if strain increases the stress will increase and vice-versa.

  • Hooke’s law is applicable to all elastic substances.

  • It does not apply to plastic deformation.

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