›› 2003, Vol. 24 ›› Issue (6): 907-912.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Wide range calibration of the stress intensity factor for the fracture toughness specimen CCNBD

JIA Xue-ming, WANG Qi-zhi   

  1. Department of Civil Engineering and Applied Mechanics，Sichuan University，Chengdu 610065, China
  • Received:2002-08-02 Online:2003-12-10 Published:2014-08-19

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Abstract: International Society for Rock Mechanics（ISRM）proposed in 1995 a new type of rock fracture toughness specimen—cracked chevron notched Brazilian disc（CCNBD），however，the calibration of the dimensionless stress intensity factor，which is an important mechanical parameter for fracture toughness calculation，is still in question. In order to provide the flexibility for choosing the CCNBD specimen geometrical parameters in experiments，considering the geometrical restrictions suggested by ISRM，the new and more accurate wide range calibration values are obtained by using a new slice synthesis method combined with finite element analysis. The results of the slice synthesis method are proved to be more accurate and reliable than those counterpart methods presently available in the reference.

Key words: cracked chevron notched Brazilian disc（CCNBD）, dimensionless stress intensity factor, fracture toughness, slice synthesis method, wide range calibration

CLC Number: 

  • TU458
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
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