The Finite Element Computer Code 3NONLIN'.

Abstract

The program was developed under research contract H0220047 'A Numerical Study of Uniaxial and Triaxial Rock Compression Tests.' The final technical report from this contract, which describes the use of this program, is currently available from NTIS under AD-764 099 at a cost of $3.00 for paper copy or $1.45 for microfiche. To accomplish the study, the two-dimensional, quasi-static finite element code NONLIN was developed to solve problems involving nonlinear, nonhomogeneous, and anisotropic materials. Nonlinearities are studied by means of the incremental or the iteration techniques, or a combination of the two. To achieve fast convergence using the stiffness perturbation technique, new iteration scheme were developed which made the solution of a wider class of problems possible. Discontinuities in displacements that arise at interfaces or at joints and cracks in rocks were possible to analyze after a special element, was developed and incorporated in the code.

Document Details

Document Type
Technical Report
Publication Date
May 01, 1973
Accession Number
AD0772165

Entities

People

  • Mohsen M. Baligh

Tags

DTIC Thesaurus Topics

  • Compression
  • Computers
  • Contracts
  • Convergence
  • Discontinuities
  • Displacement
  • Iterations
  • Materials
  • Mathematical Analysis
  • Mathematics
  • Microfiche
  • Numerical Analysis
  • Perturbations
  • Photographic Materials
  • Stiffness
  • Two Dimensional

Readers

  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Library and Information Science
  • Mechanical Engineering/Mechanics of Materials.