Research Papers

A Novel Prevailing Torque Threaded Fastener and Its Analysis

[+] Author and Article Information
H. N. Vikranth

Centre for Product Design and Manufacturing,
Indian Institute of Science,
Bengaluru-560012, India

Ashitava Ghosal

Department of Mechanical Engineering,
Indian Institute of Science,
Bengaluru-560012, India
e-mail asitava@mecheng.iisc.ernet.in

We have used r and s as equal to ensure slope continuity between two successive cubic helix profiles along the nut or bolt.

1Corresponding author.

Contributed by the Mechanisms and Robotics Committee of ASME for publication in the Journal of Mechanical Design. Manuscript received August 30, 2012; final manuscript received June 11, 2013; published online September 5, 2013. Assoc. Editor: James Schmiedeler.

J. Mech. Des 135(10), 101007 (Sep 05, 2013) (9 pages) Paper No: MD-12-1435; doi: 10.1115/1.4024977 History: Received August 30, 2012; Revised June 11, 2013

We present a novel concept of a threaded fastener that is resistant to loosening under vibration. The anti-loosening feature does not use any additional element and is based on modifying the geometry of the thread in the bolt. In a normal nut and bolt combination, the axial motion of the nut or bolt is linearly related to the rotation by a constant pitch. In the proposed concept, the axial motion in the bolt is chosen to be a cubic function of the rotation, while for the nut, the axial motion remains linearly related to the rotation. This mismatch results in interference during the tightening process and additional torque required to overcome this interference gives rise to the enhanced anti-loosening property. In addition, the cubic curve is designed to ensure that the mismatch results in stresses and deformation in the elastic region of the chosen material. This ensures that the nut can be removed and reused while maintaining a repeatable anti-loosening property in the threaded fastener. A finite element analysis demonstrates the feasibility of this concept.

Copyright © 2013 by ASME
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Bhattacharya.A., Sen.A., and Das.S., 2010, “An Investigation on the Anti-Loosening Characteristics of Threaded Fasteners Under Vibratory Conditions,” Mech. Mach. Theory, 45, pp. 1215–1225. [CrossRef]
Hess, D. P., 1998, “Vibration- and shock- induced loosening,” Handbook of Bolts and Bolted Joints, J. H.Bickford, and S.Nasser, eds., Marcel Dekker, New York, pp. 757–824.
Bickford, J. H., 1995, An Introduction to the Design and Behavior of Bolted Joints, 3rd ed., Marcel Dekker, New York.
Goodier, J. N., and Sweeney, R. J., 1945, “Loosening by Vibration of Threaded Fastening,” Mech. Eng. (Am. Soc. Mech. Eng.), 67, pp. 798–802.
Sauer, J. A., Lemmon, D. C., and Lynn, E. K., 1950, “Bolts: How to Prevent Their Loosening,” Mechanical Design, 22, pp. 133–139.
Gambrell, S. C., 1968, “Why Bolts Loosen,” Machine Design, 40(25), pp. 163–167.
Junker, G. H., 1969, “New Criteria for Self-Loosening of Fasteners Under Vibration,” SAE Technical Paper 690055, 78, pp. 314–335. [CrossRef]
Sakai, T., 1978, “Investigations of Bolt Loosening Mechanisms,” Bull. JSME, 21(159), pp. 1385–1390. [CrossRef]
Yamamoto, A., and Kasei, S., 1984, “A Solution for Self-Loosening Mechanism of Threaded Fasteners Under Transverse Vibration,” Bull. Jpn. Soc. Precis. Eng, 18(3), pp. 261–266. Available at http://www.scopus.com/inward/record.url?eid=2-s2.0-0021482587&partnerID=40&md5=cd266f246c91ae258a999dff2cf00151
Vinogradov, O., and Huang.X., 1989, “On a High Frequency Mechanism of Self-Loosening of Fasteners,” Proceedings of 12th ASME Conference on Mechanical Vibration and Noise, Montreal, Quebec, pp. 131–137.
Daabin, A., and Chow, Y. M., 1992, “A Theoretical Model to Study Thread Loosening,” Mech. Mach. Theory, 27, pp. 69–74. [CrossRef]
Zadoks, R. I., and Yu, X., 1993, “A Preliminary Study of Self-Loosening in Bolted Connections,” Proceedings of the 14th Biennial Conference on Mechanical Vibration and Noise, pp. 79–88.
Zadoks, R. I., and Yu, X., 1997, “An Investigation of the Self-Loosening Behavior of Bolts Under Transverse Vibration,” J. Sound Vib., 208, pp. 189–209. [CrossRef]
Kasei, S., and Matsuoka, H., 1998, “Considerations of Thread Loosening by Transverse Impacts,” ASME, Pressure Vessels and Piping Division (Publication) PVP, 367, pp. 117–123. Available at http://www.scopus.com/inward/record.url?eid=2-s2.0-0031643176&partnerID=40&md5=0fec954a9ed90d2f6a5525ce0f0d3253
Eccles, W., Sherrington, I., and Arnell, R. D., 2010, “Towards an Understanding of the Loosening Characteristics of Prevailing Torque Nuts,” Proc. Inst. Mech. Eng., Part C, 224, pp. 483–495. [CrossRef]
Pai, N. G., and Hess, D. P., 2002, “Experimental Study of Loosening of Threaded Fasteners due to Dynamic Shear Loads,” J. Sound Vib., 253, pp. 585–602. [CrossRef]
Pai, N. G., and Hess, D. P., 2002, “Three-Dimensional Finite Element Analysis of Threaded Fastener Loosening due to Dynamic Shear Load,” Eng. Failure Anal., 9, pp. 383–402. [CrossRef]
Hess, D. P., 1998, “Vibration and Shock–Induced Loosening,” Handbook of Bolts and Bolted Joints, Marcel Dekker, New York, pp. 757–824.
Hess, D. P., 2002, “Counter-Threaded Spring-Actuated Lock-Fasteners,” ASME J. Mech. Des., 124, pp. 582–585. [CrossRef]
Sase, N., Koga, S., Nishioka, K., and Fuji, H., 1998, “An Anti-Loosening Screw Fastener Innovation and Its Evaluation,” J. Mater. Process. Technol., 77, pp. 209–215. [CrossRef]
Sase, N., Koga, S., Nishioka, K., and Fuji, H., 1996, “Evaluation of Anti-Loosening Nuts for Screw Fasteners,” J. Mater. Process. Technol., 56, pp. 321–332. [CrossRef]
Frailly, R. A., 1973, “Prevailing Torque Locknut,” U.S. Patent No. 3,741,266.
Villo, J. P., 1977, “Rotation Resistant Nut,” U.S. Patent No. 4,005,740.
Holmes, H. D., 1981, “Reusable Prevailing Torque Nut,” U.S. Patent No. 4,293,262.
Bedi, R. D., 1992, “Self Locking Fastener,” U.S. Patent No. 5,122,020.
Dziaba, R. J., 1997, “Prevailing Torque Nut,” U.S. Patent No. 5,662,443.
Dietlein, R. W., 1990, “Fastener With Relieved Thread Section Ends,” U.S. Patent No. 4,890,965.
Ball, L., 2008, “Locking Nut and Bolt System With Enhanced Locking,” U.S. Patent No. 7,374,495 B2.
Nebl, D. R., and Dohm, S. R., 2007, “Fastener and Assembly Therewith,” U.S. Patent No. 2007/0,274,805 A1.
Holmes, H. D., 1983, “Locking Fastener,” U.S. Patent No. Re 31,284.
Duffy, R. J., 1971, “Self-Locking Threaded Element,” U.S. Patent No. 3,554,258.
Jukes, J. A., 1971, “Self-Locking Threaded Insert,” U.S. Patent No. 3,566,947.
Faroni, C. C., and Humphrey, J. S., Jr., 1971, “Self-Locking Threaded Fastener,” U.S. Patent No. 3,568,746.
Hess, D. P., Cheatham, C. A., and Acosta, C. F., 2009, “Tests and Analysis of Secondary Locking Features in Threaded Inserts,” Eng. Failure Anal., 16, pp. 39–57. [CrossRef]
Hongo, K., 1964, “Loosening of Bolt and Nut Fastening,” Trans. Japan Soc. Mech. Eng, 30(215), pp. 934–939. [CrossRef]
Vibration Loosening of Bolts and Thread Fasteners,” 2006, www.boltscience.com/pages/vibloose.htm
Oberg, E., Jones, F. D., Ryffel, H. H., McCauley, C. J., Heald, R. M., and Hussain, M. I., 2008, Machinery's Handbook, 28th ed., Industrial Press, New York.
SolidWorks Corporation, 2009, Students’s Guide to Learning SolidWorks® Software, Concord, MA.
Swanson Analysis Systems Inc., 1987, Ansys User's Manual, Houston, PA.
Srinath, L., 2008, Advanced Mechanics of Solids, McGraw-Hill, New York.
Norton, R. L., 2011, Machine Design: An Integrated Approach, Prentice-Hall, Englewood Cliffs, NJ.
International Standard, 2008, “Prevailing Torque Type Steel Nuts—Mechanical and Performance Properties,” ISO 2320:2008.


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Fig. 1

Comparison of the z coordinate in cubic and linear helical curve for M10 (r = s = 0.01)

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Fig. 2

Variation of lead angle for regular helix and cubic curves

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Fig. 3

(a)–(b) Examples of cubic profiles with varying r and s

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Fig. 4

V-profile for ISO general-purpose metric screw threads

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Fig. 5

Sectional view at θ = 76.07 deg corresponding to maximum interference

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Fig. 6

Meshing of model and boundary conditions used in FEA

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Fig. 7

Stresses in composite tubes [40]

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Fig. 8

(a)-(b) von-Mises stress and contact pressure of the interference fit from FEA

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Fig. 9

(a)-(b) von-Mises stress from FEA (for r = s = +0.17)

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Fig. 10

Centroid of the nut thread in sectional view

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Fig. 11

Fy versus interference plot (for steel)

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Fig. 13

von-Mises stress versus interference for steel and titanium alloy



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