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Poisson's ratio. In materials science and solid mechanics, Poisson's ratio ( nu) is a measure of the Poisson effect, the deformation (expansion or contraction) of a material in directions perpendicular to the specific direction of loading. The value of Poisson's ratio is the negative of the ratio of transverse strain to axial strain.
PlanetPhysics/Hooke's Law. Hooke's law describes the opposing force exerted by a spring: where is the spring constant, and is the distance the end of the spring is disturbed from its position at relaxation (assuming the other end is fixed). This law is used not only for metal springs, but also in many other "spring-like" interactions in nature ...
Robert Hooke. Robert Hooke FRS ( Isle of Wight, 18 July 1635 – London, 3 March 1703) was an English naturalist, architect and polymath. Hooke played an important role in the birth of science in the 17th century with both experimental and theoretical work. He was a colleague of Robert Boyle and Christopher Wren, and a rival to Isaac Newton.
Hooke’s Law Equation in Terms of Stress and Strain. According to this law, within the elastic limit, stress is proportional to the strain. Thus, the Hooke’s law equation can be expressed in terms of stress and strain: Stress α strain or stress/strain = constant = E. Stress = Young’s modulus of elasticity × strain. σ = E ε.
An ideal spring acts in accordance with Hooke's law, which states that the force with which the spring pushes back is linearly proportional to the distance from its equilibrium length: =, where x is the displacement vector – the distance and direction the spring is deformed from its equilibrium length.
Hooke. Hooke may refer to: Hooke, Dorset, England. River Hooke, nearby watercourse. Hooke Court, former manor house at Hooke. Hooke Park, Woodland to south west of Hooke. Robert Hooke (1635–1703), English natural philosopher who discovered Hooke's law. Hooke (surname), a surname.
