Fracture Behavior Accompanying Electromagnetic Waves of Granite in Dynamic Three Point Bending

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概要

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• A series of three-point bending tests for granite consisting of quartz, plagioclase, alkali feldspar and biotite was carried out at quasi-static and dynamic rates to examine the relation between its mechanical properties and electromagnetic phenomena during fracture. The output of ferrite-core antenna, which was located close to the specimen in a shielding box made of Permalloy plates, was measured through a band-pass filter. The dynamic bending strength was larger than the static one, i.e. the positive strain-rate dependence was observed in the strength of granite. It was also found that the intensity of electromagnetic waves measured in dynamic tests was much greater than that observed in static tests. This means that the electromagnetic phenomenon strongly depends on the loading rate, too.

• 一般社団法人 日本機械学会の論文

著者

• Horikawa Keitaro

  Department Of Mechanical Engineering Faculty Of Engineering The University Of Tokushima

• Watanabe Keiko

  Department Of Aerospace Engineering Graduate School Of Engineering Tohoku University

• Kobayashi Hidetoshi

  Department Of Internal Medicine Division Of Metabolism And Endocrinology St. Marianna University School Of Medicine

• OGAWA Kinya

  Institute of Space Dynamics

• WATANABE Keiko

  Department of Mechanical Engineering, Graduate School of Science & Engineering, Ritsumeikan University

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