Assessment and influence of internal rigid core on the contact parameters for soft hemispherical fingertips
-
K. Venkatesh Raja
and
R. Malayalamurthi
Abstract
The main purpose of the present work is to develop an artificial fingertip comprised of a soft layer and an inner rigid core, which emulates a human one with skin and bone. The influences of introducing the core and the effects of variations in thickness of the soft layer over the contact parameters are investigated. From the results, it is evident that the power law theory proposed by (Xydas N, Kao I. Int. J. Rob. Res. 1999, 18, 941–950) becomes invalid in this criterion; by contrast, if the power law theory acts for finger tips with internal cores, the conclusion may be redefined in such a way that the soft material behaves more softly in the presence of internal cores and the dimensionless number, core-soft layer coefficient Fcs≈0.5, is the critical parameter which produces the change of behavior. Moreover, soft finger tips with an inner core are preferable to entirely soft ones, as a higher grasping stability is achieved with the same area of contact, and the conforming nature of the fingers is maintained.
References
[1] Mason MT, Salisbury JK. Robot Hands and the Mechanics of Manipulation, MIT Press: Cambridge, MA, 1985.Search in Google Scholar
[2] Hertz H. In Assorted Papers (New York, Macmillan, 1882) [Quoted in K. L. Johnson, Contact Mechanics, Cambridge University Press: Cambridge, UK, 1985.Search in Google Scholar
[3] Timoshenko SP, Goodier JN. Theory of Elasticity, 3rd ed., McGraw-Hill: New York, 1970, pp. 414–420.10.1115/1.3408648Search in Google Scholar
[4] Schallamach A. Proc. Physical Soc. 1969, 65, 657–661.Search in Google Scholar
[5] Cutkosky M, Jourdain J, Wright P. Proc., 1987 IEEE Int. Conf.Rob. Autom. 1987, 4, 1649–1654.Search in Google Scholar
[6] Han HY, Shimada A, Kawamura S. Proc., 1996 IEEE Int. Conf. Rob. Autom. 1996, 4, 3061–3066.Search in Google Scholar
[7] Kinoshita H, Bäckström L, Flanagan JR, Johansson RS. J. Neurophysio. 1997, 78, 1619–1630.Search in Google Scholar
[8] Tatara Y. J. Eng. Mater. Technol. 1989, 111, 163–168.Search in Google Scholar
[9] Tatara Y. J. Eng. Mater. Technol. 1991, 113, 285–291.Search in Google Scholar
[10] Tatara Y, Shima S, Lucero JC. J. Eng. Mater. Technol. 1991, 113, 292–295.Search in Google Scholar
[11] Xydas N, Kao I. Int. J. Rob. Res. 1999, 18, 941–950.Search in Google Scholar
[12] Xydas N, Bhagavat M, Kao I. IEEE Int. Conf.Rob. Autom., 2000. Proc. ICRA ’00. 2000, 3, 2179–2184.Search in Google Scholar
[13] Li Y, Kao I. Proc. 2001 ICRA.IEEE Int. Conf. Rob. Autom., 2001. 2001, 3, 3055–3060.Search in Google Scholar
[14] Park K-H, Kim B-H, Hirai S. Development of a Soft-Fingertip and its Modeling Based on Force Distribution. In: Proceedings of the 2003 IEEE. International Conference on Robotics & Automation. Taipei, Taiwan, Sep 14–19, 2003, p. 14–19.Search in Google Scholar
[15] Kao I, Yang F. IEEE Trans. Rob. Autom. 2004, 20, 132–135.Search in Google Scholar
[16] Tiezzi P, Vassura G. Proc., 12th Int. Conf. Adv. Rob., 2005. ICAR ’05, 2005, 109–114. DOI: 10.1109/ICAR.2005.1507399.10.1109/ICAR.2005.1507399Search in Google Scholar
[17] Johnson KL. Contact Mechanics, Cambridge University Press: Cambridge, UK, 1985.Search in Google Scholar
[18] Xydas N, Kao I. Proc., 2000 IEEE/RSJ Int. Conf.Intell. Rob. Syst., 2000. (IROS 2000). 2000, 2, 1285–1290.Search in Google Scholar
[19] ANSYS 11.0 Documentation, ANSYS Inc., 2008.Search in Google Scholar
[20] Raja KV, Malayalamurthi R. Int. J. Mech. Mat. Des. 2011, 7, 299–305.Search in Google Scholar
[21] Ogden RW. Rubb. Chem. Technol. 1986, 59, 361–383.Search in Google Scholar
[22] Ogden RW. Non-Linear Elastic Deformations, Courier Dover Publications: New York, 1997.Search in Google Scholar
[23] Lee J-H, Lee S-S, Chang J-D, Thompson MS, Kang D-J, Park S., Park S. Sci. World J. 2013, 2013; doi:10.1155/2013/930798.10.1155/2013/930798Search in Google Scholar PubMed PubMed Central
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Articles in the same Issue
- Frontmatter
- Original articles
- Electronic transport in organic memories of chitosan with gold nanoparticles
- The influence of transport layers on the photodegradation stability of polymer solar cell structures
- Synthesis and properties of acrylamide 2-acrylamido-2-methypropane sulfonic acid sodium styrene sulfonate N-vinyl pyrrolidone quadripolymer and its reduction of drilling fluid filtration at high temperature and high salinity
- Synthesis and characterization of a series of novel amino β-cyclodextrin-conjugated poly(ε-lysine) derivatives
- Cellulose fibre-cellulose acetate hybrid composites with nanosilica
- Assessment and influence of internal rigid core on the contact parameters for soft hemispherical fingertips
- Properties of high temperature resistance and salt tolerance drilling fluids incorporating acrylamide/2-acrylamido-2-methyl-1-propane sulfonic acid/N-vinylpyrrolidone/dimethyl diallyl ammonium chloride quadripolymer as fluid loss additives
- Thermotropic overheating protection glazings: effect of functional additives and processing conditions on the overheating protection performance
- Experimental rapid surface heating by induction for injection molding of large LCD TV frames
- Effect of reaction conditions on the thermal stability of polystyrene grafted oil palm empty fruit bunch (OPEFB) fiber
- Compatibilization of polyamide 6/poly(2,6-dimethyl-1,4-phenylene oxide) blends by poly(styrene-co-maleic anhydride)
