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NESC0332 SAFE-3D

SAFE-3D, Stress Analysis of 3-D Composite Structure by Finite Elements Method

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1. NAME OR DESIGNATION OF PROGRAM:  SAFE-3D
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2. COMPUTERS
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Program name Package id Status Status date
SAFE-3D NESC0332/02 Tested 01-DEC-1969

Machines used:

Package ID Orig. computer Test computer
NESC0332/02 IBM 360 series IBM 360 series
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3. DESCRIPTION OF PROBLEM OR FUNCTION

SAFE-3D is a finite-element program for the three-dimensional elastic analysis of heterogeneous  composite structures. The program uses the following types of finite elements - (1) tetrahedral elements to represent the continuum, (2)  triangular plane stress membrane elements to represent inner liner or outer case, and (3) uniaxial tension-compression elements to represent internal reinforcement. The structure can be of arbitrary  geometry and have any distribution of material properties, temperatures, surface loadings, and boundary conditions.
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4. METHOD OF SOLUTION

The finite-element variational method is used.  Equilibrium equations are solved by the alternating component iterative method.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

Maxima of -
    5000 nodes
   16000 elements
The program cannot be applied to incompressible solids and is not recommended for Poisson's ratio in the range of nu between 0.495 and 0.5.
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6. TYPICAL RUNNING TIME

Execution of the sample problem on the IBM360/75 requires 15 minutes.
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7. UNUSUAL FEATURES OF THE PROGRAM:
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8. RELATED AND AUXILIARY PROGRAMS

SAFE-PCRS, SAFE-AXISYM, and SAFE- PLANE (NESC Abstract 252).
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9. STATUS
Package ID Status date Status
NESC0332/02 01-DEC-1969 Tested at NEADB
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10. REFERENCES

- NTRAN, I/O Routines for Tape and Drum, Excerpt from UNIVAC 1107
  FORTRAN IV Programmers Reference Manual
  UP-3569, Rev. 1.
- J. S. Crowell,
  SAFE-3D 360 Overlay Structure and Miscellaneous Information
  ORNL Note (January 1971).
NESC0332/02, included references:
- D.C. Cornell, K.B. Jadhav, and Y. R. Rashid:
  SAFE-3D - A Computer Program for the Three-dimensional Stress
  Analysis of Composite Structures - A Users Manual
  GA-7855 (September 1967).
- Y.R. Rashid:
  Three-dimensional Analysis of Elastic Solids
  GA-8419 (February 1968).
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11. MACHINE REQUIREMENTS

52K fast memory storage and 8,000,000 auxiliary storage for the UNIVAC1108.
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NESC0332/02 FORTRAN-IV
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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:  EXEC2, GAX33A (UNIVAC1108) and OS/360 (IBM360).
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:
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15. NAME AND ESTABLISHMENT OF AUTHORS

   1108          D. C. Cornell and K. Jadhav
                 General Atomic Company
                 P. O. Box 81608
                 San Diego, California  92138
   360           J. S. Crowell
                 Mathematics Division
                 Oak Ridge National Laboratory
                 P. O. Box X
                 Oak Ridge, Tennessee  37830
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16. MATERIAL AVAILABLE
NESC0332/02
File name File description Records
NESC0332_02.001 SOURCE & OVERLAY CARDS IBM 360 5772
NESC0332_02.002 INPUT DATA CASE 1 207
NESC0332_02.003 INPUT DATA CASE 2 207
NESC0332_02.004 OUTPUT CASE 1 883
NESC0332_02.005 OUTPUT CASE 2 2650
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17. CATEGORIES
  • I. Deformation and Stress Distributions, Structural Analysis and Engineering Design Studies

Keywords: elasticity, finite element method, mechanical structures, stresses, three-dimensional.