Coupling mechanism of granular medium and slender beams

Luyao Cai; Piervincenzo Rizzo; Kaiyuan Li; Leith Al-Nazer

doi:10.1117/12.2044144

10 April 2014 Coupling mechanism of granular medium and slender beams

Luyao Cai, Piervincenzo Rizzo, Kaiyuan Li, Leith Al-Nazer

Proceedings Volume 9063, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2014; 90631Z (2014) https://doi.org/10.1117/12.2044144
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2014, San Diego, California, United States

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.

Citation Download Citation

Luyao Cai, Piervincenzo Rizzo, Kaiyuan Li, and Leith Al-Nazer "Coupling mechanism of granular medium and slender beams", Proc. SPIE 9063, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2014, 90631Z (10 April 2014); https://doi.org/10.1117/12.2044144

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