Experimental Study on the Transition between Static and Kinetic Frictions of Steel/Shale Pairs

<div>Tangential force measured on the unlubricated mild steel/shale pair versus time of testing. SEM micrographs of the contact area of the shale after different times of testing (arrows indicate the direction of tangential force applied).</div>

Shock and Vibration

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Figure 9

Figure 9: Experimental Study on the Transition between Static and Kinetic Frictions of Steel/Shale Pairs 