Determination of the elastic modulus of materials by the impedance method

The impedance method is widely used for non-destructive testing of structural elements of space technology. However, this method is not used to determine the physical and mechanical characteristics of materials. The aim of the work is to expand the capabilities of the impedance method for determining the modulus of material elasticity. A method of local dynamic action on the surface of the material is proposed. This method contains an algorithm for analyzing the components of mechanical impedance to determine the elastic modulus of a material. To implement the proposed method, an ultrasonic emitter with an indenter is used for contact action on the surface of the material under study. The ultrasonic emitter contains acceleration and force sensors. To obtain information about the physical and mechanical characteristics of the material, a certain frequency range is used. The frequency range is determined from the condition – all signals of the ultrasonic emitter sensors have a harmonic shape. This condition allows us to use simple mathematical methods for processing experimental data (symbolic method of system analysis and rules for converting electrical circuits) without losing information about the object. The proposed method makes it possible to determine the elastic modulus of materials depending on the frequency of mechanical impact with an error of no more than 10 %