Young’s modulus

Young's Modulus

•Young’s modulus is a measure of the stiffness or rigidity of a material. It provides a direct indication of the extent of the distortion that can be expected for a given load. A stiff material has a high Young's modulus and changes its shape only slightly under elastic loads (e.g. diamond). A flexible material has a low Young's modulus and changes its shape considerably (e.g. rubbers), Without this quantity, comparing the rigidity of any two materials is difficult. And also they call it elastic modulus, because young's modulus is the most common elastic modulus used.

•Young's modulus sometime change in the orientations of a material, because the most of the material are isotropic , and there mechanical properties still the same.

•History about Young's modulus Young's modulus is named after Thomas Young, British scientist. But Young's modulus developed by Leonhard Euler. And in the first time they start to used it by Giordano Riccati. Unit : The unit of Young's modulus is the pascal.

•Used : We used it to determining the stretch and rigidity of a material We can used it to predict the elongation or compression of an object if the stress is less than the yield strength of the material.

Calculation : Like what we said that Young's modulus describes how much a material will stretch when put under a given stress. And the calculation of the Young's modulus of a sample of material is therefore:

Young's modulus = stress / strain