›› 2005, Vol. 26 ›› Issue (12): 1913-1916.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Spatial distribution of tensile stress in Brazilian disk test of rock

YU Yong1, CHEN Ping2   

  1. 1. Department of Applied Mechanics and Engineering, Southwest Jiaotong University, Chengdu 610031, China; 2. Shenzhen Research and Design Institute, China Academy of Railway Sciences, Shenzhen 518034, China
  • Received:2004-06-09 Online:2005-12-10 Published:2014-01-12

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Abstract: The authors pointed out that the formula existed for more than 40 years to calculate the tensile strength of rock in Brazilian test is based on 2D elastic theory; and the formula is not suitable for the practical condition which is a 3D problem. In order to obtain 3D stress distribution within the specimen, we adopted software package Marc to carry out a 3D finite element analysis. It is found that the tensile stress distribution at a cross-section of a solid specimen is similar to that of 2D disk. However, the tensile stress at a cross-section varies with the thickness of the specimen. The nearer the cross-section closes to the end of the specimen, the higher the horizontal tensile stress is. When the height-to-diameter ratio of the specimen is 1 and Poisson’s ratio is 0.25, the tensile strength calculated by the classical 2D solution is 23.3% less than the real value.

Key words: Brazilian test, tensile strength, 3D FEM, rock, Marc, Matlab

CLC Number: 

  • TU 452
  • 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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