NESC9851 MATLOC.

1. NAME OR DESIGNATION OF PROGRAM:  MATLOC.

3. DESCRIPTION OF PROGRAM OR FUNCTION

MATLOC is a nonlinear, transient, two-dimensional (planer and axisymmetric), thermal- stress, finite-element code designed to determine the deformation within a fractured rock mass. The mass is modeled as a nonlinear anisotropic elastic material which can exhibit stress-dependent bi-linear locking behavior.

4. METHOD OF SOLUTION

The numerical solution of the nonlinear equilibrium equations is performed using the incremental tangential  stiffness method in which the material stiffness matrices are continually updated.

5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

Three-dimensional deformations and discontinuous displacements across open fractures and faults cannot be modeled. MATLOC can solve a problem with of 400 elements  with  up to 1000  nodes, of which 200  may be fixed.

6. TYPICAL RUNNING TIME:

NEA-DB ran the test cases included in this package on a CDC CYBER 830 computer. Execution times varied between 1 second for  sample cases 1 and 2, and 690 seconds for the Transient-BWIP case.

7. UNUSUAL FEATURES OF THE PROGRAM

MATLOC is primarily suited for use in room and canister scale studies of the excavation, operational, and short-term post-closure processes for sites within  geological media which do not exhibit significant viscoelastic (creep) phenomena or in situations where the viscoelastic behavior can be ignored.

8. RELATED AND AUXILIARY PROGRAMS

In order to perform a complete thermomechanical analysis, MATLOC must be used in conjunction with a SCEPTER thermal analysis code, such as DOT-BPMD (NESC Summary R9833) or SWENT. The heat transfer code is used to compute the steady-state or transient thermal field in the form of nodal temperatures to be read by MATLOC.

10. REFERENCES:

- INTERA Environmental Consultants Inc. :
  MATLOC: A Two-Dimensional and Axisymmetric Nonlinear Finite
  Element Transient Thermal Stress Analysis Code for Rock Masses
  That Exhibit Bilinear Locking Behavior
  ONWI-421 (April 1983)

11. MACHINE REQUIREMENTS:  80K words.

The test cases included in this package ran on a CDC CYBER 830 in 276,800 (octal) words of main storage.

13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:

NOS 2.5.1 (CDC CYBER 830) with FTN 4.8 compiler.

14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:

15. NAME AND ESTABLISHMENT OF AUTHORS

            P. Boonlualohr, G. Mustoe, and
            J.R. Williams, Dames & Moore
            B.H. Lester and P.S. Huyakorn
            GeoTrans, Inc.
            Office of Nuclear Waste Isolation
            Battelle Project Management Division
            505 King Avenue, Columbus, Ohio 43201

Contact     M.J. Golis

File name	File description	Records
NESC9851_01.001	Information file	81
NESC9851_01.002	JCL and control information	29
NESC9851_01.003	MATLOC FORTRAN source	2579
NESC9851_01.004	Sample problem 1 input	34
NESC9851_01.005	Sample problem 1 temperature data	13
NESC9851_01.006	Sample problem 2 input	34
NESC9851_01.007	Sample problem 2 temperature data	13
NESC9851_01.008	Sample problem 3 input	75
NESC9851_01.009	Sample problem 3 temperature data	43
NESC9851_01.010	Sample problem 4 input	63
NESC9851_01.011	Application data for TRANSIENT-BWIP S.P.	653
NESC9851_01.012	Application data for GEOSTATIC-BWIP S.P.	365
NESC9851_01.013	Temperature data for BWIP sample problem	5271
NESC9851_01.014	Sample problem 1 output	176
NESC9851_01.015	Sample problem 2 output	176
NESC9851_01.016	Sample problem 3 output	365
NESC9851_01.017	Sample problem 4 output	689
NESC9851_01.018	TRANSIENT-BWIP sample problem output	39082
NESC9851_01.019	GEOSTATIC-BWIP sample problem output	3226