180. NUMERICAL AND EXPERIMENTAL INVESTIGATION OF SLIDER DISK CONTACT EFFECTS ON THE DIMPLE/GIMBAL INTERFACE
Name: Youyi Fu
Grad Year: 2013
Fretting wear occurs at the dimple/gimbal interface during intermittent contact between the slider and the disk media at the hard disk drive interface, leading to generation of wear particles that can deteriorate the hard disk drive performance. Both numerical and experimental studies are carried out to investigate the effect of frictional forces during contact at the dimple/gimbal interface. A finite element model is used to determine the interaction between the dynamics of the air bearing surface and the slider-suspension assembly upon contact with the disk. To that end, a dynamic air bearing simulator, contact model and suspension model are coupled using a sequential method. The time history of the slider motion and forces at the air bearing surface and dimple/gimbal interface are investigated. Similarly, multiple touch down and take off experimental tests are performed in order to determine hysteresis effects and critical disk revolution speeds. Laser-Doppler Vibrometry (LDV) is used to measure the vibrations upon contact between slider and disk.