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Proceedings Paper

Coupling mechanism of granular medium and slender beams
Author(s): Luyao Cai; Piervincenzo Rizzo; Kaiyuan Li; Leith Al-Nazer
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Paper Abstract

We present a methodology to assess slender beams by means of highly nonlinear solitary waves. This is accomplished by understanding the coupling mechanism between highly nonlinear solitary waves propagating along a granular system and a beam in contact with the granular medium. Nonlinear solitary waves are compact non-dispersive waves that can form and travel in nonlinear systems such as one-dimensional chains of particles. In the study presented in this paper, the waves are generated by the mechanical impact of a striker and are detected by means of sensor beads located along the chain. We investigated numerically and experimentally the effect on the solitary waves of slender beams of different modulus, length, boundary condition, and axial stress. We found that the geometric and mechanical properties of the beam or thermal stress applied to the beam alter certain features of the solitary waves. In the future, these findings may be used to develop a novel sensing system for the Nondestructive Evaluation of beams.

Paper Details

Date Published: 10 April 2014
PDF: 8 pages
Proc. SPIE 9063, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2014, 90631Z (10 April 2014); doi: 10.1117/12.2044144
Show Author Affiliations
Luyao Cai, Purdue Univ. (United States)
Piervincenzo Rizzo, Univ. of Pittsburgh (United States)
Kaiyuan Li, Univ. of Pittsburgh (United States)
Leith Al-Nazer, Federal Railroad Administration (United States)


Published in SPIE Proceedings Vol. 9063:
Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2014
H. Felix Wu; Tzu-Yang Yu; Andrew L. Gyekenyesi; Peter J. Shull, Editor(s)

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