Dynamic Tensile Failure in Rocks

Abstract

The results of a two-year program on dynamic fracture behavior of rocks are described. The goal was to develop the capability to predict the fragment size distribution of rock resulting from known dynamic loads. This goal has been largely realized for a simple, well-characterized rock type, Arkansas novaculite, under one-dimensional-strain impact loading. A gas gun was used to accelerate flat plates against flat rock specimens. Ytterbium piezoresistive stress gages were used to measure stress histories, and the dynamic tensile strength and fragment size distributions were determined. The mechanism of fragmentation was deduced from fractographic observations on impacted specimens.

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Document Details

Document Type
Technical Report
Publication Date
Jun 26, 1973
Accession Number
AD0765723

Entities

People

  • Carl F. Petersen
  • Donald A. Shockey
  • Donald R. Curran
  • John T. Rosenberg
  • Lynn Seaman

Organizations

  • SRI International

Tags

Communities of Interest

  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Crack Propagation
  • Crystal Structure
  • Dynamic Loads
  • Electron Microscopes
  • Electron Microscopy
  • Materials
  • Materials Laboratories
  • Measurement
  • Mechanical Properties
  • Mechanics
  • Microscopes
  • Stress Waves
  • Stresses
  • Tensile Strength
  • Tensile Stress
  • Tensile Testing
  • Wave Propagation

Readers

  • Defense Technology Research and Development.
  • Explosive Engineering.
  • Mechanical Engineering/Mechanics of Materials.