JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2011, Vol. 41 ›› Issue (3): 131-136.

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Study of  failure analysis and the acoustic emission signature of 3-D crack
 from  different origins  under uniaxial compression

SHAO Dongliang1, LI Shucai1, LI Mingtian1,2, ZHANG Bo1, ZHANG Gongshi1   

  1. 1. Geotechnical and Structural Engineering Research Center, Shandong University, Jinan  250061, China;
    2. Department of Civil Engineering, Shandong Jiaotong University, Jinan 250023, China
  • Received:2010-11-05 Online:2011-06-16 Published:2010-11-05

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Abstract:

With the material, the fracture process under different backfilling conditions was  studied. Using the acoustic emission test technology,  the acoustic emission signature of the whole rupture process of the test specimen was analyzed, including the initiation, propagation and disruption. It was shown  by the test that  different origins  would influence the failure mode of the crack propagation in some way, or, to be exact, the crack initiation strength and compressive strength varied from different origin conditions, and there were  some differences in the hits-t curve. The acoustic emission hits-t duration curve synchronized with the stresstime curve, and the volatility of the curve reflected the burstiness of the energy release in crack propagation.

Key words: cutting, acoustic emission signature, fracture, propagation

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