PROPERTY MEASURING METHOD USING DUAL STRUCTURE SPECIMEN

摘要

Disclosed is a property measuring method using a dual structure specimen. According to an embodiment of the present invention, the method includes a specimen manufacturing step of manufacturing a specimen by combining a property measurement target material, having unknown properties, with a base material having known properties; a bending deformation measuring step of measuring a bending deformation value of the specimen by deforming the specimen; a bending radius calculating step of calculating a bending radius (R) of the specimen by applying the measured bending deformation value to the equation 1 below; and an elastic modulus calculating step of calculating an elastic modulus of the property measurement target material by applying the bending radius (R) to the equation 2 below. In the equation 1, h is the height of the arc, formed by the bending deformation of the specimen, S is the length of the chord, formed by the bending deformation of the specimen, and R is the bending radius of the specimen. In the equation 2, t_1 is the thickness of the property measurement target material, t_2 is the thickness of the base material, α_1 is the thermal expansion coefficient of the property measurement target material, α_2 is the thermal expansion coefficient of the base material, E_1 is the elastic coefficient of the property measurement target material, E_2 is the elastic coefficient of the base material, and ΔT indicates the temperature of the specimen after the bending deformation - the initial temperature of the specimen.;COPYRIGHT KIPO 2015