BEM Calibration of the Short-Rod Specimen for Fracture Toughness Test of Rock

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概要

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• The results of numerical calibration of a standard short-rod rock specimen with a chevron crack used in the ISRM suggested method are reported, where the boundary element method was used to compute compliance, the stress intensity factor based on the compliance and the distribution of the local stress intensity factor along the crack front edge for various crack depths. The local stress intensity factor is never uniform for a straight front edge of the crack. The change of the shape of the front edge during the fracture toughness test was computed for two cases. In the first case, crack growth resistance is independent of crack growth and, in the second case, crack growth resistance increases with crack growth. Based on the results of the calibration, the validity of the ISRM suggested method for the measurement of rock fracture toughness is discussed.

• 一般社団法人日本機械学会の論文
• 1991-10-15

著者

• Saito Hitoshi

  Sony Co. Ltd.

• Hayashi Kazuo

  Institute For Fluid Science Tohoku University

関連論文

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• Analysis of Stress-induced Wellbore Breakouts in an Arbitrarily Oriented Tectonic Stress Field
• BEM Analysis of a Cylindrical Three-Point Bend Specimen with a Chevron Crack for Fracture Toughness Test of Rock
• Efficient Numerical Method Based on Double Porosity Model to Analyze Heat and Fluid Flows in Fractured Rock Formations
• Detection of formation boundaries and permeable fractures based on frequency-domain Stoneley wave logs
• BEM Calibration of the Short-Rod Specimen for Fracture Toughness Test of Rock

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