An Elastodynamic Model of Frictional Contact and Its Influence on the Dynamics of a Workpiece-Fixture System

[+] Author and Article Information
B. Fang, R. E. DeVor, S. G. Kapoor

Department of Mechanical and Industrial Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801

J. Manuf. Sci. Eng 123(3), 481-489 (Oct 01, 2000) (9 pages) doi:10.1115/1.1381006 History: Received March 01, 2000; Revised October 01, 2000
Copyright © 2001 by ASME
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Modular fixture setup with the workpiece in place
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Part/fixture configuration
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A preloaded triaxial force sensor
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Comparison of experimental and simulated impulse hammer force
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Comparison of accelerations at A1, A2 and A3 (without side supports)
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Comparison of transfer function at A1 and A3 without side supports (dotted lines are fitted transfer functions)
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Mode shapes: (a) first mode of case 1; (b) second mode of case 1; (c) first mode of case 2 (dotted lines are representation of the undeformed workpiece; arrows indicate the motion in the z-direction)
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Comparison of accelerations at A1, A2 and A3 (with side clamping force=378 N)
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Comparison of transfer functions at A1 and A3 (with side clamping force=378 N)
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Comparison of reaction force in normal direction at L3
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Experimentally determined damping ratios and effective stiffness at A1 with increasing side clamping magnitude
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Experimental results: evolution of transfer functions at A1 in the transition region
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Two measured accelerations (one at locator L4 and one at workpiece top surface right above L4)
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Damping ratio at A1 and side clamping magnitude in the frictional contact region
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Comparison of transfer function at A1 (with side clamping force=1913 N)




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