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TECHNICAL PAPERS

Computing Design Rationales by Interpreting Simulations*

[+] Author and Article Information
Thomas F. Stahovich, Anand Raghavan

Carnegie Mellon University, Pittsburgh, PA 15213

J. Mech. Des 122(1), 77-82 (Jan 01, 2000) (6 pages) doi:10.1115/1.533547 History: Received August 01, 1998; Revised January 01, 2000
Copyright © 2000 by ASME
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References

Figures

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Collet blades (a) nominal geometry (b) geometry with taper removed
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Nominal simulation. Collet displacement is in degrees, other displacements are in mm. Because of the way the simulator works, all of the velocities are computed relative to the eraser end of the pencil which thus appears stationary.
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Modified simulation. Collet displacement is in degrees, other displacements are in mm. Because of the way the simulator works, all of the velocities are computed relative to the eraser end of the pencil which thus appears stationary.
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Forces in the pencil (a) nominal simulation (b) modified simulation. The first subscript denotes the body that applies the force, the second denotes the body to which the force is applied. “c”=collet,“r”=ring,“b”=body, and “l”=lead. “N” denotes a normal or wedging force, “f” a friction force, and “M” the moment of a force. For example “Nrc” is the normal force of the ring on the collet, and “MNrc” is the moment of that force.
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These displacement-time plots differ starting at the beginning of the third segment
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(a) Three force equilibrium, (b) four force equilibrium

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