›› 2010, Vol. 31 ›› Issue (3): 815-820.

• Geotechnical Engineering • Previous Articles     Next Articles

Research on chaotic characteristics of rock acoustic emission

ZHOU Xiao-ping，LIU Qing-yi   

  1. College of Civil Engineering, Chongqing University, Chongqing 400045,China
  • Received:2008-08-27 Online:2010-03-10 Published:2010-03-31

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Abstract:

Acoustic emission (AE), which is produced with the load increasing, is a ubiquitous phenomenon associated with brittle fracture in many brittle materials such as rock .AE technique is better than other methods in researching failure of brittle materials. AE is tested in rock specimen under loading and breakage, and the signal of AE is recorded. Action laws of AE in rocks are studied by using chaotic kinetics. According to the recorded experimental data, the correlation dimension and the maximum Lyapunov exponents are calculated. It is shown from numerical results that the loading and failure process of rock possesses chaotic characteristics. Based on the theory of phase space reconstruction, it is well revealed their kinetic characteristics during the failure process. It is a basis for applying chaos theory to research rock acoustic emission.

Key words: rock acoustic emission, chaos, correlation dimension, maximum Lyapunov exponent

CLC Number: 

  • TU 459+.3
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