Anomalous Frictional Behavior in Collisions of Thin Disks Calsamiglia, J. ; Kennedy, S. W. ; Chatterjee, A. ; Ruina, A. ; Jenkins, J. T. Abstract Publication: Journal of Applied Mechanics Pub Date: 1999 DOI: 10.1115/1.2789141 Bibcode: 1999JAM....66..146C