Connecting Winding Codes to Quality Control Devices

Abstract

The goal of this study was to develop an extension to the winding models which can convert the outputs of pressures and stresses to units that can be measured using existing quality control devices, the Rho meter in this case. The Rho meter makes dynamic measurement of the hardness of a wound roll. The peak deceleration of the Rho meter striker is measured and converted into arbitrary "Rho" units, which is a measure of hardness of the wound roll. Initially, experiments were conducted to study the variation of hardness in a wound roll as a function of winding tension and the roll outer radius. Based on the experimental results, a dynamic impact model was developed to simulate the Rho meter. The output obtained from the model was compared to the experimental results. The model made fair predictions of the roll hardness. The material properties vary in time due to the pressures generated by the impact. The explicit method was used in the dynamic analysis since it facilitates the updating of material properties after each solution in time step. Due to this, large computation times are associated with this model. Different algorithms were used to calculate the time step required for the explicit solution and the algorithm employed in this model shows good convergence. The accuracy of the model output increases with an increase in mesh density.