Multi-Directional Wave Velocity by Piezoelectric Crystals

by Tarun K. Agarwal, Old Dominion Univ, Norfolk, United States,
Isao Ishibashi, Old Dominion Univ, Norfolk, United States,

Document Type: Proceeding Paper

Part of: Recent Advances in Instrumentation, Data Acquisition and Testing in Soil Dynamics


Piezoelectric ceramics are successfully used to measure velocities of waves propagating through a dry granular material assembly. Several directional shear and compression waves are measured in a cubical (102 × 102 × 102 mm) specimen in order to quantify anisotropic characteristics of glass sphere assembly. Special configurations of piezoelectric bender elements are needed to transmit vibrating signals through highly energy-dispersive dry specimen especially for compression wave transmission. Detailed wave generation and measuring system, design of the piezoelectric sensors, and a brief experimental results are presented.

Subject Headings: Wave velocity | Wave measurement | Piezoelectricity | Shear waves | Ceramics | Granular materials | Compression | Power transmission

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