Dynamic Tensile Failure in Rocks

Abstract

A fracture model is being developed based on the hypothesis that dynamic tensile failure in rocks occurs by the activation of preexisting flaws which propagate and may coalesce to produce fragments of various size. During the previous year the first two stages of the fracture process--flaw activation and crack growth--were treated quantitatively. The fracture model in its present stage of development allows us to predict the number of cracks, the total fracture surface area, and the energy absorbed by creation of new surface resulting from a known dynamic loading history. Although the model is not complete, procedures to generalize the fracture model to other rocks were initiated by examining petrographically specimens of Sioux quartzite, Westerly granite, and pink Tennessee marble to attempt to reveal and describe quantitatively their inherent flaw structures.

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Document Details

Document Type
Technical Report
Publication Date
Oct 30, 1972
Accession Number
AD0752054

Entities

People

  • Donald A. Shockey

Organizations

  • SRI International

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Abstracts
  • Boundaries
  • Civil Engineering
  • Computers
  • Electron Microscopes
  • Electron Microscopy
  • Energy
  • Failure Mode And Effect Analysis
  • Gas Guns
  • Measurement
  • Microscopes
  • Photography
  • Scanning Electron Microscopes
  • Scanning Electron Microscopy
  • Stress Waves
  • Tensile Strength
  • Tensile Stress

Readers

  • Computational Modeling and Simulation
  • Geotechnical Engineering.
  • Materials Science (Mechanical Engineering).