Micro Contact Model and Dynamic Response Analysis of Head Disk Interface

doi:10.3901/JME.2022.03.121

Abstract

Abstract: In view of the nanoscale contact behavior of head disk interface at present, the improved GW model is proposed to evaluate micro contact force. And the intermolecular force is also introduced to establish the contact mechanical model of the head disk interface. Then the two degree of freedom dynamic model is performed on this contact mechanical model. The dynamic response characteristics of head under different contact states is analyzed by Runge Kutta method. The results demonstrate that when the flying height is lowered to a certain value, the contact will induce the self-excited vibration of the head, which is a key issue that affects the flying instability of the head. To verify the accuracy of the head-disk interface contact dynamics model, the heads with the same physical parameters as the dynamic model are selected to perform the dynamic response test under overload condition. It shows that the relative error between the theoretical calculation value of the model and the experimental test result is less than 8%.

Key words: head disk interface, contact model, self-excited vibration

CLC Number:

TH16

WANG Yu, ZHANG Fan, CHAO Shilin, ZI Yanyang. Micro Contact Model and Dynamic Response Analysis of Head Disk Interface[J]. Journal of Mechanical Engineering, 2022, 58(3): 121-130.

References

[1] MAN Y. An investigation into the head-disk interface technology leading to extremely small mechanical head-disk spacing[D]. Singapore:National University of Singapore,2013.
[2] Bruno M,Thomas P,Hsia Y T,et al. The head-disk interface roadmap to an areal density of 4 Tbit/in2[J]. Advances in Tribology,2013,2013.
[3] MARCHON B, OISON T. Magnetic spacing trends:from LMR to PMR and beyond[J]. IEEE Transactions on Magnetics, 2009, 45(10):3608-3611.
[4] THORNTON B,BOGY D B. Head-disk interface dynamic instability due to intermolecular forces[J]. IEEE Trans on Magnetics,2003,39(5):2420-2422.
[5] WEI P,Kiely J,Hsia Y T. Wear analysis of head-disk interface during contact[J]. Journal of Tribology,2005,127(1):171-179.
[6] Sang H K,Guo X C,Waltman R J,et al. Durability against contact wear of nonlubricated disks in the head-disk interface of disk drives[J]. IEEE Transactions on Magnetics,2010,47(1):239-243.
[7] Chen Y K,Murthy A N,Pit R,et al. Angstrom scale wear of the air-bearing sliders in hard disk drives[J]. Tribology Letters,2014,54(3):273-278.
[8] ELERATH J,PECHT M. A Highly accurate method for assessing reliability of redundant arrays of inexpensive disks (RAID)[J]. IEEE Transactions on Computers,2009,58(3):289-299.
[9] Li N,Zheng L S,Meng Y G,et al. Experimental study of head-disk interface flyability and durability at sub-1-nm clearance[J]. IEEE Transactions on Magnetics,2009,45(10):3624-3627.
[10] 谢建全. 硬盘磁头故障诱发原因研究[J]. 小型微型计算机系统,2003,24(6):1102-1104. Xie Jianquan. Research to causes of magnetic head breakdown in hard disks[J]. Mini-Micro Systems,2003,24(6):1102-1104.
[11] Canchi S V,Bogy D B. Slider dynamics in the lubricant-contact regime[J]. IEEE Transactions on Magnetics,2010,46(3):764-769.
[12] Ma Y S,Liu B. Experimental study of slider-disk interaction process with thermal-flying-height controlled slider[J]. Microsystem Technologies,2011,17(5-7):965-969.
[13] Shimizu Y,Xu J G,Kohira H,et al. Experimental study on slider dynamics during touchdown by using thermal flying-height control[J]. Microsystem Technologies,2011,17(5-7):897-902.
[14] Wang Y,Wei X F,Liang X H,et al. Slider dynamics and wear behaviors at subnano-clearance head-disk interface[J]. IEEE Transactions on Magnetics,2016,52(1):1-9.
[15] Chen D,Bogy D B. Numerical investigation of bouncing vibrations of an air bearing slider in near or partial contact[J]. Journal of Tribology,2010,132(1):011901.
[16] Ono K,Yamane M. Theoretical study of self-excited and forced vibrations of flying head slider in near-contact region[J]. IEEE Transactions on Magnetics,2007,43(9):3785-3790.
[17] Ono K. Analysis of microwaviness-excited vibrations of a flying head slider in proximity and asperity contact regimes[J]. Journal of Tribology,2017,139(6).
[18] Ono K. Design considerations of a contact slider and bouncing vibration in near-contact regime[J]. Magnetics IEEE Transactions on,2004,40(4):3136-3141.
[19] Greenwood J A,Williamson J B P. Contact of nominally flat surfaces[J]. Proceedings of the Royal Society of London,1966,295(1442):300-319.
[20] REESE J. A Greenwood-Williamson model of small-scale friction[J]. Journal of Applied Mechanics,2007,74(1):31-40.
[21] Ono K. Analysis of elastic contact due to meniscus adhesion force[J]. Transactions of the Japan Society of Mechanical Engineers,2015,81(825):14-00673-00614-00673.
[22] SUH A Y,POLYCARPOU A A. Adhesive contact modeling for sub-5-nm ultralow flying magnetic storage head-disk interfaces including roughness effects[J]. Journal of Applied Physics,2005,97(10):616.
[23] ONO K,YAMANE M. Improved analysis of unstable bouncing vibration and stabilizing design of flying head slider in near-contact region[J]. Journal of Tribology,2007,129(1):50-61.
[24] 高莉莉,包玉花. 机械制造技术[M]. 上海:上海交通大学出版社,2014. Gao Lili,Bao Yuhua. Machine manufacture technology[M]. Shanghai:Shanghai Jiao Tong University Press,2014.