Aspects of Mechanical Behavior of Rock under Static and Cyclic Loading. Part A: Mechanical Behavior or Rock under Static Loading

Abstract

A finite element program based on both 2- and 3-dimensional element models is developed to simulate the Brazilian test. Rock isotropy nonhomogeneity, and anisotropy are taken into account in the analysis. The program has two failure criteria options: the old criterion described in the semiannual report and a new criterion in which the elastic modulus across tension cracks is reduced to zero. Tests runs have shown that the new failure criterion yields far more realistic load-displacement and load-strain curves. A new equation solving procedure, the sparse matrix technique, is used in the program making possible the solution of certain problems which could not be handled by the banded matrix technique because of computer storage limitations. To demonstrate the capabilities of the program, several test problems were run.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1973
Accession Number
AD0772508

Entities

People

  • Jesus E. Basas
  • Robert W. Heins

Organizations

  • University of Wisconsin–Madison

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Anisotropy
  • Compression
  • Computer Programming
  • Computer Programs
  • Computers
  • Digital Computers
  • Engineering
  • Equations
  • Modulus Of Elasticity
  • Procedures (Computers)
  • Random Number Generators
  • Sparse Matrix
  • Stiffness
  • Tensile Strength
  • Three Dimensional
  • Two Dimensional
  • Universities

Fields of Study

  • Engineering

Readers

  • Materials Science (Mechanical Engineering).
  • Mechanical Engineering/Mechanics of Materials.
  • Systems Analysis and Design