Aspects of Mechanical Behavior of Rock Under Static and Cyclic Loading. Part B. Mechanical Behavior of Rock Under Cyclic Loading

Abstract

S-N curves were obtained for a marble and a limestone in uniaxial compression and for two marbles in tension. The study of internal structure changes in rock subjected to uniaxial compression (acoustic emission, optical diffraction, photomicrography) revealed that cyclic fatigue is the result of a microfracturing process, consisting of grain boundary loosening in the first cycles, intragranular cracking in the following, succeeded by crack extension, coalescence, widening, fracture. Consideration of cyclic loading effects due to phenomena like earthquakes, drilling, blasting, should be incorporated in any design of underground or surface rock structures.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1972
Accession Number
AD0751050

Entities

People

  • Bezalel C. Haimson
  • Robert W. Heins

Organizations

  • University of Wisconsin–Madison

Tags

Communities of Interest

  • Sensors

DTIC Thesaurus Topics

  • Acoustic Emissions
  • Compressive Strength
  • Crystal Structure
  • Cyclic Loads
  • Cyclic Tests
  • Diffraction Analysis
  • Dynamic Loads
  • Engineering
  • Load Cells
  • Materials
  • Measurement
  • Optical Analysis
  • Photographs
  • Strain Gages
  • Stress Strain Relations
  • Stresses
  • Tensile Strength

Readers

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