A Study of Early Stage Self-Loosening of Bolted Joints

[+] Author and Article Information
Yanyao Jiang, Ming Zhang

Mechanical Engineering, University of Nevada, Reno, NV 89557

Chu-Hwa Lee

Ford Motor Company, Advanced Engineering Center, 20000 Rotunda Drive, Dearborn, MI 48121

J. Mech. Des 125(3), 518-526 (Sep 04, 2003) (9 pages) doi:10.1115/1.1586936 History: Received May 01, 2002; Revised February 01, 2003; Online September 04, 2003
Copyright © 2003 by ASME
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Self-loosening sequence
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Experimental setup for self-loosening experiment; (a) Sectional view, (b) Three-dimensional view
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Experimentally observed clamping force reduction with number of loading cycles
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Variation of transverse load amplitude with number of loading cycles for displacement-controlled experiments
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Finite element mesh model; (a) Complete model, (b) Enlarged view near the first thread
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Axial stress contours during a transverse loading cycle; (a) Upon application of preload (unit: MPa), (b) After reaching a maximum transverse load (unit: MPa), (c) After the transverse load reached minus maximum (unit: MPa), (d) After returning to zero from minus maximum (unit: MPa)
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Axial stress-strain response at the notch root
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Redistribution of axial stress with loading cycles
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Comparison of FE predictions with experimental clamping force reduction
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Schematic illustration of the transverse load versus displacement relationship
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Comparison of experimental transverse load versus displacement relation with FE prediction
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Influence of friction on FE self-loosening prediction
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Self-loosening predictions obtained from two mesh models and comparison with experiment




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