Ms. C., South Tehran Branch, Islamic Azad University, Tehran, Iran
Assistant Professor, South Tehran Branch, Islamic Azad University, Tehran, Iran
The influence of surface roughness magnitude and direction on dry static friction coefficient between two similar steel samples has been studied through an experiment. A testing apparatus has been designed and fabricated to measure the friction coefficient for a few forms of surface asperity. According to the results of the experiments, dry friction coefficient is affected by both magnitude and direction of surface roughness.