A three-dimensional finite element (FE) model with the consideration of the helix angle of the threads was developed to simulate the second stage self-loosening of a bolted joint. The second stage self-loosening refers to the graduate reduction in clamping force due to the back-off of the nut. The simulations were conducted for two plates jointed by a bolt and a nut and the joint was subjected to transverse or shear loading. An M12×1.75 bolt was used. The application of the preload was simulated by using an orthogonal temperature expansion method. FE simulations were conducted for several loading conditions with different preloads and relative displacements between the two clamped plates. It was found that due to the application of the cyclic transverse load, micro-slip occurred between the contacting surfaces of the engaged threads of the bolt and the nut. In addition, a cyclic bending moment was introduced on the bolted joint. The cyclic bending moment resulted in an oscillation of the contact pressure on the contacting surfaces of the engaged threads. The micro-slip between the engaged threads and the variation of the contact pressure were identified to be the major mechanisms responsible for the self-loosening of a bolted joint. Simplified finite element models were developed that confirmed the mechanisms discovered. The major self-loosening behavior of a bolted joint can be properly reproduced with the FE model developed. The results obtained agree quantitatively with the experimental observations.
Skip Nav Destination
ASME/JSME 2004 Pressure Vessels and Piping Conference
July 25–29, 2004
San Diego, California, USA
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
0-7918-4673-3
PROCEEDINGS PAPER
Finite Element Modeling of Self-Loosening of Bolted Joints
Chu-Hwa Lee
Chu-Hwa Lee
Ford Motor Company, Dearborn, MI
Search for other works by this author on:
Ming Zhang
University of Nevada, Reno, NV
Yanyao Jiang
University of Nevada, Reno, NV
Chu-Hwa Lee
Ford Motor Company, Dearborn, MI
Paper No:
PVP2004-2618, pp. 19-27; 9 pages
Published Online:
August 12, 2008
Citation
Zhang, M, Jiang, Y, & Lee, C. "Finite Element Modeling of Self-Loosening of Bolted Joints." Proceedings of the ASME/JSME 2004 Pressure Vessels and Piping Conference. Analysis of Bolted Joints. San Diego, California, USA. July 25–29, 2004. pp. 19-27. ASME. https://doi.org/10.1115/PVP2004-2618
Download citation file:
29
Views
Related Proceedings Papers
Related Articles
Finite Element Modeling of Self-Loosening of Bolted Joints
J. Mech. Des (February,2007)
Elastic Plastic Finite Element Analysis of Bolted Joint During Tightening Process
J. Mech. Des (December,2003)
A Study of Early Stage Self-Loosening of Bolted Joints
J. Mech. Des (September,2003)
Related Chapters
The Execution Time Overhead of Entering and Exiting Scoped Memory in Real-Time Java Applications
International Conference on Computer Engineering and Technology, 3rd (ICCET 2011)
Positioning and Channel Strategy of Jiuan Company in the Domestic Market
International Conference on Electronics, Information and Communication Engineering (EICE 2012)
Cache Insertion Policy Based on Each Thread's Behavior
International Conference on Instrumentation, Measurement, Circuits and Systems (ICIMCS 2011)