INFLUENCE OF TESTING METHODS ON THE FINAL VALUES OF THE MODULUS OF ELASTICITY E

Abstract

In the area of elastic deformation there is linear dependence between the applied stress and final deformation, which is described by the Hooke´s law. Thus stress and strain are proportional to each other and constant of proportionality is termed as modulus of elasticity (even. Young´s modulus). So this material constant characterizes the elastic deformation behavior of the given material and its magnitude represents the very important material constant in all industrial branches and mainly determines the dimensions for the given parts. That is why it´s truly very important to precisely measure its values for different materials. Because of this were in this article used two methods for measurement Young´s modulus E (MPa) – static tensile test and three-point bend test. Main aim was to obtain statistical evaluation about influence of these testing methods on the final values of modulus of elasticity.

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