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Solitary Wave-based Diagnostic Scheme Using Granular Crystal Sensor and Actuator
Date: Monday, April 4, 2011 Time: 4:00 PM Location: 125 Steele, Caltech Speaker: Jinkyu Yang, Caltech postdoctoral scholar in aerospace
Kavli Nanoscience Institute / Microdevices Lab (KNI-MDL) Seminar
We propose a new diagnostic scheme based on highly nonlinear solitary waves to inspect material systems in a nondestructive and time-efficient manner. These diagnostic solitary waves are generated using a prototype of granular crystal sensor and actuator, which is composed of a one-dimensional chain of tightly packed elastic particles. Via direct contact, this device transmits a single solitary wave into an inspection medium, and its mechanical properties are obtained by analyzing the reflected signals originating from the interface. The feasibility of the granular crystal sensor and actuator is demonstrated for several applications, including composite delamination detection and biomedical implant stability assessment. In this talk, we present our collaborative research with the Los Angeles Orthopaedic Hospital on the characterization of bone mechanical properties using the granular crystal sensor/actuator instrument. Preliminary study shows the potential of this novel sensor and actuator suite for the fast and reliable evaluation of engineered and biological systems, offering a compact and inexpensive diagnostic tool for nondestructive evaluation applications.
Light refreshments will be served after the seminar.