Dynamic Analysis of Impact Tools by Using a Method Based on Stress Wave Propagation and Impulse-Momentum Principle

[+] Author and Article Information
Dante A. Elı́as, Luciano E. Chiang

Department of Mechanical Engineering, Pontificia Universidad Católica de Chile, Santiago, Chile

J. Mech. Des 125(1), 131-142 (Mar 21, 2003) (12 pages) doi:10.1115/1.1539509 History: Received November 01, 2001; Revised May 01, 2002; Online March 21, 2003
Copyright © 2003 by ASME
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Schematics of an impact hammer
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Linear momentum principle applied to a node between times t and t+
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Drill bar-drill bit interface
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Linear momentum principle applied to the mid-section of an element
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Schematic of the quasi-static indentation test
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Force-penetration curve
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Testing system schematic–pneumatic gun
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Resulting rock force-penetration curve for independent measurements of force and penetration
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Sections for two-point strain measurement
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Experimental vs theoretical comparison
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Model of the piston and bit
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Force vs time: Interface piston-bit
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Rock penetration vs time
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Piston and bit energy time-history
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Force penetration history-time
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Model of a rock drill hammer
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Energy distribution in rock drill hammer
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Transmitted force through gaps in rock drill hammer




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