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TECHNICAL BRIEFS

The Role of Beam Flexibility and Ground Contact Model in the Clattering of Deformable Beams

[+] Author and Article Information
Zhongping Bao

Department of Theoretical and Applied Mechanics, Cornell University, Ithaca, NY 14853 e-mail: zb22@cornell.edu

Suresh Goyal

Wireless Research Laboratory, Lucent Technologies, Bell Laboratories, 600 Mountain Avenue, Rm. 1B-212, Murray Hill, NJ 07974 e-mail: goyal@bell-labs.com

Liang-Jenq Leu

Department of Civil Engineering, National Taiwan University, Taipei, Taiwan, 10617 e-mail: ljleu@ce.ntu.edu.tw

Subrata Mukherjee

Department of Theoretical and Applied Mechanics, Cornell University, Ithaca, NY 14853e-mail: sm85@cornell.edu

J. Dyn. Sys., Meas., Control 126(2), 421-425 (Aug 05, 2004) (5 pages) doi:10.1115/1.1771694 History: Revised September 22, 2003; Online August 05, 2004
Copyright © 2004 by ASME
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References

Goyal,  S., Upasani,  S., and Patel,  D. M., 1999, “Improving Impact Tolerance of Portable Electronic Products: Case Study of Cellular Phones,” Exp. Mech., 39(1), pp. 43–52.
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Rubin, S., 1988, “Concepts in Shock Data Analysis,” Shock and Vibration Handbook, 3rd edition, Harris, C. M., eds., McGraw-Hill, New York.
Goyal,  S., Papadopoulos,  J. M., and Sullivan,  P. A., 1997, “Shock Protection of Portable Electronic Products: Shock Response Spectrum, Damage Boundary Approach, and Beyond,” Shock Vib., 4(3), pp. 169–191.
Goyal,  S., Papadopoulos,  J. M., and Sullivan,  P. A., 1998a, “The Dynamics of Clattering I: Equation of Motion and Examples,” ASME J. Dyn. Syst., Meas., Control, 120, pp. 83–93.
Goyal,  S., Papadopoulos,  J. M., and Sullivan,  P. A., 1998b, “The Dynamics of Clattering II: Global Results and Shock Protection,” ASME J. Dyn. Syst., Meas., Control, 120, pp. 94–102.
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Bao, Z., 2004, “Study of Static and Dynamic Deformation of Structures With Applications in MEMS,” Ph.D Dissertation, Cornell University, Ithaca, NY (under preparation).

Figures

Grahic Jump Location
Clattering sequence for a rigid rod with uniformly distributed mass (from Goyal et al. 7)
Grahic Jump Location
Numerically calculated response of the impact end in a vertical impact (a) velocity history for a 200 mm bar; (b) displacement history of bars of different lengths. (contact time equals the elapsed time until the displacement first becomes positive).
Grahic Jump Location
Clattering and chattering of a steel bar subjected to a shallow angle impact
Grahic Jump Location
Maximum jump in the average velocity normalized with respect to the initial velocity at impact as a function of (a) beam stiffness, (b) coefficient of restitution

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