Impact dynamics modelling of viscoelastic materials

Abstract

The aim of this paper is modelling and simulation of nonlinear impact system of viscoelastic bodies. Linear impact model was developed based on Kelvin-Voigt, and nonlinear modelling was based on Hunt-Crossley model. Two approaches were used in the nonlinear modelling; one is based on standard parameters of stiffness/damping coefficients, and the other approach is based on calibrated coefficients of stiffness/damping terms.A multi velocity values are considered to be 10.00 m/s, 20.00 m/s and 30.00 m/s to evaluate the dynamic response of the viscoelastic impact model. This study concentrated on various high velocity impact to enhance a modeling process where coding solve type and Matlab Simulink environment is utilized.In addition, higher order ODE fitted data model has been used to improve the dynamic response of the viscoelastic body by optimizing fundamental impact model parameters, i.e. stiffness and damping terms based on deflection-time experimental data. The nonlinear body response and the contact force are analyzed and the results showed the linear model has been corrected by 96.39% from experimental one, while the fitted data model corrected by 96.72%.