Study on Internal Stress Vibration and Edge Wear of a Cleaning Blade

Abstract

We took photoelastic image of the edge of the cleaning blade at high speed. By tracking the fringes showing the internal stress in the obtained high-speed photoelastic video, the vibration of the internal stress was captured as numerical data. It was also confirmed that the vibration value of the internal stress changed when the contact conditions of the cleaning blade were changed. We devised a model equation for fatigue wear which was assumed that at locations where internal stress was locally concentrated, wear progresses due to the accumulation of minute fatigue fractures caused by repeated stress changes, and the linear cumulative damage rule was applied to repeated stress changes. We analyzed several combinations of the amplitude distribution of internal stresses and the amount of wear in the actual machine. A good correlation was obtained between them, confirming the certainty of the model.