JAC3D -- A three-dimensional finite element computer program for the nonlinear quasi-static response of solids with the conjugate gradient method; Yucca Mountain Site Characterization Project

Technical Report · Mon Feb 01 04:00:00 EST 1993

DOI:https://doi.org/10.2172/138710· OSTI ID:138710

Biffle, J. H.

JAC3D is a three-dimensional finite element program designed to solve quasi-static nonlinear mechanics problems. A set of continuum equations describes the nonlinear mechanics involving large rotation and strain. A nonlinear conjugate gradient method is used to solve the equation. The method is implemented in a three-dimensional setting with various methods for accelerating convergence. Sliding interface logic is also implemented. An eight-node Lagrangian uniform strain element is used with hourglass stiffness to control the zero-energy modes. This report documents the elastic and isothermal elastic-plastic material model. Other material models, documented elsewhere, are also available. The program is vectorized for efficient performance on Cray computers. Sample problems described are the bending of a thin beam, the rotation of a unit cube, and the pressurization and thermal loading of a hollow sphere.

• Research Organization: Sandia National Labs., Albuquerque, NM (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 138710
• Report Number(s): SAND--87-1305; ON: DE93015729
• Country of Publication: United States
• Language: English

Related Subjects

05 NUCLEAR FUELS
54 ENVIRONMENTAL SCIENCES
ALGORITHMS
BOUNDARY CONDITIONS
CRAY COMPUTERS
ELASTICITY
FINITE ELEMENT METHOD
GRAVITATION
J CODES
LAGRANGIAN FUNCTION
NUMERICAL SOLUTION
PLASTICITY
RESERVOIR PRESSURE
RESERVOIR ROCK
RESPONSE FUNCTIONS
ROTATION
SITE CHARACTERIZATION
SOIL MECHANICS
STATIC LOADS
STRAINS
THREE-DIMENSIONAL CALCULATIONS
YUCCA MOUNTAIN
Yucca Mountain Project