BEM Analysis of a Cylindrical Three-Point Bend Specimen with a Chevron Crack for Fracture Toughness Test of Rock

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概要

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• The stress intensity factor along the periphery of a chevron crack in a cylindrical three point bend specimen (CB) is evaluated by BEM for the establishment of a rock fracture toughness test using CB specimens. So far, in the test, the stress intensity factor is assumed to be constant along the front edge of the crack and is evaluated by the compliance method. It is revealed by the present analysis that the stress intensity factor takes a minimum value at the center of the front edge so that the crack growth during the fracture toughness test makes the front edge of the crack concave. It is also shown that the stress intensity factor evaluated by the compliance method is larger than that of the concave crack with a homogeneous distribution of the stress intensity factor along the front edge. This implies that the fracture toughness test leads to overestimation.

• 一般社団法人日本機械学会の論文
• 1989-07-15

著者

• Abe Hiroyuki

  Fuculty Of Engineering Tohoku University

• Ono Akihiko

  Mitsubishi Electric Co.

• HAYASHI Kazuo

  Institute of Fluid Science, Tohoku University

• Hayashi Kazuo

  Institute For Fluid Science Tohoku University

• Hayashi Kazuo

  Institute Of High Speed Mechanics Tohoku University

関連論文

• Inverse Problem on the Evaluation of Hydraulic Properties of Rocks Deep in the Earth's Crust and Effect of Tubular Compliance
• 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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