| Abstract
| - The discrete-element method (DEM) is a numerical model consisting of the fundamental laws of motion anda suitable force-displacement model, such as the linear spring-and-dashpot model, as closure. The dampingcoefficient found in the latter is related to the phenomenological concept of coefficient of restitution of solidparticles. However, the relationship between these two coefficients is strongly dependent on various materialproperties of the solid particles to be simulated, and so its determination often involves a numerical trial-and-error procedure. This paper addresses this problem by presenting a master calibration curve and equationthat can be used to calculate the value of the damping coefficient directly from values of the coefficient ofrestitution and other material properties. The Buckingham Pi theorem was applied to derive a functionalrelationship between the two coefficients and other material properties, which allowed a large number ofcalibration curves to be collapsed onto a single master calibration curve.
|
