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Young's modulus |
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Young's modulus [for Thomas Young Young, Thomas, 1773–1829, English physicist, physician, and Egyptologist. He established (1799) a medical practice in London and was elected (1811) to the staff of St. George's Hospital there. ..... Click the link for more information. ], 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 elasticity, the ability of a body to resist a distorting influence or stress and to return to its original size and shape when the stress is removed. All solids are elastic for small enough deformations or strains, but if the stress exceeds a certain amount known as ..... Click the link for more information. 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 strength of materials, measurement in engineering of the capacity of metal, wood, concrete, and other materials to withstand stress and strain. Stress is the internal force exerted by one part of an elastic body upon the adjoining part, and strain is the deformation ..... Click the link for more information. . |
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In 2003, though, PMG had to adjust its sights slightly as a new regulation stipulated a specific Young's modulus of 40 giga-pascal per density. 0] is Young's modulus at absolute zero, and b and [T. Vicar softening temperature is 134 C and Young's modulus is 609,000 psi. |
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Young's modulus
