Influence of Microstructure on Fracture Propagation in Rock

Abstract

The report describes the results of research to measure the tensile fracture resistance and identify the micro-mechanism of fracture in three rock types: Barre granite, Sioux quartzite, and Dresser basalt. The experiments involved wedge-loading of double-cantilever-beam specimens from which the fracture energy dissipation rate, R, was determined. The specimen orientation and environment were varied in the tests. In addition to measurement of load/ displacement records, the specimens were monitored for acoustic emission during the tests and the fracture surfaces of selected broken specimens were examined by optical-, scanning-electron-, and replica-electron-microscopy.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1973
Accession Number
AD0774145

Entities

People

  • Alan R. Rosenfield
  • George T. Hahn
  • Richard G. Hoagland

Organizations

  • Battelle Memorial Institute

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acoustic Emissions
  • Cantilever Beams
  • Ceramic Materials
  • Crack Propagation
  • Crack Tips
  • Electron Microscopes
  • Electron Microscopy
  • Materials
  • Materials Testing
  • Mechanical Properties
  • Mechanics
  • Microscopy
  • Modulus Of Elasticity
  • Resistance
  • Tectosilicates
  • Tensile Strength
  • Test Methods

Readers

  • Geotechnical Engineering.
  • Materials Science (Mechanical Engineering).

Technology Areas

  • Microelectronics
  • Microelectronics - Microelectromechanical Systems