Stick-slip behavior of paper during friction testing
Abstract
Paper often exhibits oscillatory stick-slip motion during friction testing using a horizontal sled apparatus. The motion consists of a constant-amplitude oscillation in the force required to move the sled, which may occasionally turn into a heavily-damped oscillation. The transition between these two types of behavior is discrete, not continuous. Depending on the operating conditions, either or both of the above motions can be seen in a single test. A theoretical framework is presented for the analysis of this motion, and it is shown that the distinction between the two classes can be made based on the sled speed and the difference between the static and kinetic coefficients of friction. It has been found that two different grades of paper may consistently fall into different categories when classified according to the shape of their oscillation. It is suggested that stick-slip behaviour may provide a more reproducible test of the difference between samples than does the traditional friction test which is based only on the measurement of the first peak in the friction curve.
Citation
Penner, A. P. (1995, June). Stick-slip behavior of paper during friction testing. Paper presented at the Third International Conference on Web Handling (IWEB), Stillwater, OK.