Accession Number:

AD0772165

Title:

The Finite Element Computer Code 3NONLIN'.

Descriptive Note:

Final technical rept.,

Corporate Author:

SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CALIF

Personal Author(s):

Report Date:

1973-05-01

Pagination or Media Count:

1.0

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.

Subject Categories:

  • Geology, Geochemistry and Mineralogy
  • Computer Programming and Software
  • Computer Hardware

Distribution Statement:

APPROVED FOR PUBLIC RELEASE