Young's modulus
The Columbia Encyclopedia, Sixth Edition | Date: 2008
Young's modulus [for Thomas Young ], number representing (in pounds per square inch or dynes per square centimeter) the ratio of stress to strain for a wire or bar of a given substance. According to Hooke's law the strain is proportional to stress, and therefore the ratio of the two is a constant that is commonly used to indicate the elasticity of the substance. Young's modulus is the elastic modulus for tension, or tensile stress, and is the force per unit cross section of the material divided by the fractional increase in length resulting from the stretching of a standard rod or wire of the material. See strength of materials .
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The Columbia Encyclopedia, Sixth Edition 2008
The Columbia Encyclopedia, Sixth Edition. Copyright 2008 Columbia University Press
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Related entries from encyclopedias, dictionaries, and thesauruses
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elastic modulus
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... applied to a material, the resulting strain is determined by Young's modulus ( Thomas Young ), a constant defined as the ratio of the stress ... dyne/cm2, or lbs per sq in. (psi). elasticity . elastic modulus elastic modulus elastic modulus
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Elasticity
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... the modulus of elasticity is Young's modulus. Named after English physicist Thomas Young (1773-1829), Young's modulus is simply the ratio between F ... Elastic modu li — including Young's modulus, shearing modulus, and bulk modulus ...
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Young, Thomas
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... present the Young-Helmholtz theory of colour vision and detailed the cause of astigmatism . He studied elasticity, giving his name to the tensile elastic (Young's) modulus. Young was also an Egyptologist who helped decipher the Rosetta Stone .
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elasticity
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... torsion, and shearing (see strength of materials ). For each kind of stress and the corresponding strain there is a modulus, i.e., the ratio of the stress to the strain; the ratio of tensile stress to strain for a given material is called its Young's modulus . Hooke's law [for Robert Hooke ] ...
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Thomas Young
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