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Power Law Statistics of Force and Acoustic Emission from a Slowly Penetrated Granular Bed : Volume 21, Issue 1 (03/01/2014)

By Matsuyama, K.

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Book Id: WPLBN0003991160
Format Type: PDF Article :
File Size: Pages 8
Reproduction Date: 2015

Title: Power Law Statistics of Force and Acoustic Emission from a Slowly Penetrated Granular Bed : Volume 21, Issue 1 (03/01/2014)  
Author: Matsuyama, K.
Volume: Vol. 21, Issue 1
Language: English
Subject: Science, Nonlinear, Processes
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Matsuyama, K., & Katsuragi, H. (2014). Power Law Statistics of Force and Acoustic Emission from a Slowly Penetrated Granular Bed : Volume 21, Issue 1 (03/01/2014). Retrieved from

Description: Department of Applied Science for Electronics and Materials, Kyushu University, 6-1 Kasuga 816-8580, Japan. Penetration-resistant force and acoustic emission (AE) from a plunged granular bed are experimentally investigated through their power law distribution forms. An AE sensor is buried in a glass bead bed. Then, the bed is slowly penetrated by a solid sphere. During the penetration, the resistant force exerted on the sphere and the AE signal are measured. The resistant force shows power law relation to the penetration depth. The power law exponent is independent of the penetration speed, while it seems to depend on the container's size. For the AE signal, we find that the size distribution of AE events obeys power laws. The power law exponent depends on grain size. Using the energy scaling, the experimentally observed power law exponents are discussed and compared to the Gutenberg–Richter (GR) law.

Power law statistics of force and acoustic emission from a slowly penetrated granular bed

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