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Proceedings Paper

Meso-structure analysis on instability of dynamic fracture in rock
Author(s): Cai-ping Liu; Qing-quan Duan
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Paper Abstract

On the basis of three point bending dynamic fracture tests with high speed photography, the fracture surfaces are scanned by Scanning Electronic Microscope(SEM)and Laser Profilometer. Instability in rapid rupture of rocks is analyzed from the phenomena that occur in those meso-structures. From energy point of view, the instability mechanism concerning microbranching and fracture mode dependence of crack velocity is discussed. As a result of instability, the critical dynamic fracture energy is an increasing function of crack velocity, rather than a constant material parameter.

Paper Details

Date Published: 14 April 2010
PDF: 7 pages
Proc. SPIE 7522, Fourth International Conference on Experimental Mechanics, 752210 (14 April 2010); doi: 10.1117/12.851493
Show Author Affiliations
Cai-ping Liu, Univ. of Science and Technology Beijing (China)
Qing-quan Duan, China Univ. of Petroleum (China)

Published in SPIE Proceedings Vol. 7522:
Fourth International Conference on Experimental Mechanics
Chenggen Quan; Kemao Qian; Anand Krishna Asundi; Fook Siong Chau, Editor(s)

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