Previous analyses of threaded fasteners under vibration are based on static equilibrium conditions with supporting data limited to low frequency loading. Such analyses predict only a net loosening action. This paper presents a dynamic model of a single-bolt assembly with moderate pre-load subjected to axial harmonic vibration. Simulations with this model predict that threaded fasteners can, on the average, loosen or tighten in the presence of vibration; and that the applied vibration, as well as other system parameters, can be tuned so that either action occurs. Measurements from a single-bolt assembly apparatus are presented and compared with the simulations.

Issue Section:
Research Papers
Topics:
Manufacturing, Vibration, Engineering simulation, Fasteners, Simulation, Dynamic models, Equilibrium (Physics), Stress
1.
Bickford, J. H., 1990, An Introduction to the Design and Behavior of Bolted Joints, 2nd edition, Dekker, New York.
2.
Eccles
W.
,
1984
, “
Bolted Joint Design
,”
Engineering Designer
, Vol.
10
, pp.
10
–
14
.
3.
Goodier
J. N.
, and
Sweeney
R. J.
,
1945
, “
Loosening by Vibration of Threaded Fastenings
,”
Mechanical Engineering
, Vol.
67
, pp.
798
–
802
.
4.
Hess
D. P.
, and
Davis
K. D.
,
1996
, “
Threaded Components Under Axial Harmonic Vibration, Part 1: Experiments
,”
ASME JOURNAL OF VIBRATION AND ACOUSTICS
, Vol.
118
, pp.
417
–
422
.
5.
Hess
D. P.
,
1996
, “
Threaded Components Under Axial Harmonic Vibration, Part 2: Kinematic Analysis
,”
ASME JOURNAL OF VIBRATION AND ACOUSTICS
, Vol.
118
, pp.
423
–
429
.
6.
Hunt
K. H.
, and
Crossley
F. R.
,
1975
, “
Coefficient of Restitution Interpreted as Damping in Vibroimpact
,”
ASME Journal of Applied Mechanics
, Vol.
42
, pp.
440
–
445
.
7.
Junker
G. H.
,
1969
, “
New Criteria for Self-Loosening of Fasteners Under Vibration
,”
Society of Automotive Engineers Transactions
, Vol.
78
, pp.
414
–
435
.
8.
Kerley, J. J., 1987, An Application of Retroduction to Analyzing and Testing the Backing Off of Nuts and Bolts During Dynamic Loading, NASA Technical Memorandum 4001, Goddard Space Flight Center, Maryland.
9.
Sakai
T.
,
1978
, “
Bolt Loosening Mechanisms, 1st Report: Bolts of Transversely Loaded Joints, 2nd Report: Center Bolts of Twisted Joints
,”
Bulletin of JSME
, Vol.
21
, pp.
1385
–
1394
.
10.
Sudhirkashyap, S. V., 1995, Modeling and Simulation of Threaded Fastener Dynamics, M.S. Thesis, University of South Florida.
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