EXPERIMENTAL TESTING OF THE IMPACT METHOD FOR MATERIAL ELASTICITY MODULUS MEASUREMENT
An elastic-visco-plastic mechanoreological model has been developed for the theoretical analysis of the impact interaction of a spherical body with a surface. The study is given to the effect of elastic, viscous and plastic parameters of the model on dynamic parameters of the impact process. On the basis of the obtained results a new impact method for material elasticity modulus measurement has been developed and patented. The method is applied as follows. In the course of the experiment, a free-falling spherical indentor with known properties impacts a sample of the studied material while impact parameters including impact duration, rebound height, maximum magnitude of impact interaction force and time corresponding to maximum value of impact interaction force are recorded. Then a software-aided calculation is performed based on the developed mathematical model. The required elasticity modulus of the tested material is estimated by the numerical value of the stiffness factor attributable to the elastic element within the elastic-viscous block of the calculation model, at which the parameters of impact interaction estimated on the model will match those determined experimentally. An experimental test of the impact method for material elasticity modulus measurement is performed. The article provides its brief description.