Estimation of the number of cracks generated by compressive stress in polycrystalline graphite using ultrasonic method

R. Furushima, Y. Matsuo, Tadashi Shiota, J. S. Cross, K. Yasuda

Research output: Contribution to journalArticle

Abstract

A theory was developed to estimate the change in the apparent sonic velocity in porous ceramics by solving Lavrov's integral equation of the cylindrical inclusion problem. It was shown that the change in apparent sonic velocity was caused by phase shift of the sonic wave. To extend the theory to the case of multiple inclusions, the superposition principle was applied. The theory was verified by analyzing the apparent sonic velocity during a compression test of polycrystalline graphite, and the number of cracks that formed during loading was estimated to be 700, when the dimensions of crack length and width were assumed to be 1mm and 10μm, respectively.

Original languageEnglish
Article number012029
JournalJournal of Physics: Conference Series
Volume191
DOIs
Publication statusPublished - Jan 1 2009
Externally publishedYes

Fingerprint

cracks
graphite
ultrasonics
inclusions
compression tests
integral equations
phase shift
ceramics
estimates

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Estimation of the number of cracks generated by compressive stress in polycrystalline graphite using ultrasonic method. / Furushima, R.; Matsuo, Y.; Shiota, Tadashi; Cross, J. S.; Yasuda, K.

In: Journal of Physics: Conference Series, Vol. 191, 012029, 01.01.2009.

Research output: Contribution to journalArticle

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