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NESC0611 CHILES

CHILES, Singularity Strength of Linear Elastic Bodies by Finite Elements Method

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1. NAME OR DESIGNATION OF PROGRAM:  CHILES
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2. COMPUTERS
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Program name Package id Status Status date
CHILES NESC0611/01 Tested 25-MAY-1981
CHILES NESC0611/02 Tested 01-MAY-1981

Machines used:

Package ID Orig. computer Test computer
NESC0611/01 CDC 7600 CDC 7600
NESC0611/02 CDC 7600 IBM 370/168
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3. DESCRIPTION OF PROBLEM OR FUNCTION

CHILES  is a  finite  element
computer program that calculates the  strength of singularities in
linear   elastic  bodies.    Plane  stress,   plane  strain,   and
axisymmetric  conditions  are  treated.    Crack  tip  singularity
problems are solved by  this version of the code, but  any type of
integrable  singularity  may  be  properly  modeled  by  modifying
selected subroutines in the program.
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4. METHOD OF SOLUTION

A generalized,  quadrilateral finite  element
that includes a singular point at a corner node is incorporated in
the code.  The displacement formulation  is used and inter-element
compatibility  is  maintained  so  that  monotone  convergence  is
preserved.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

CHILES      allows
three singular points to be modeled in the body being analyzed and
each singular point  may have coupled Mode I  and II deformations.
1000 nodal points may be used.
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6. TYPICAL RUNNING TIME

Less  than  2  minutes is  required  for  a
typical problem.
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7. UNUSUAL FEATURES OF THE PROGRAM

A pre-created  mesh may  be read
from  an external  file and  computed  results are  written on  an
external file for plotting.
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8. RELATED AND AUXILIARY PROGRAMS:
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9. STATUS
Package ID Status date Status
NESC0611/01 25-MAY-1981 Tested at NEADB
NESC0611/02 01-MAY-1981 Tested at NEADB
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10. REFERENCES

- S.E. Benzley:
  Representation of Singularities with Isoparametric Finite
  Elements
  International Journal for Numerical Methods in Engineering,
  (to be published).
NESC0611/01, included references:
- S.E. Benzley and Z.E. Beisinger:
  CHILES - A Finite Element Computer Program that Calculates the
  Intensities of Linear Elastic Singularities
  SLA-73-0894 (September 1973).
NESC0611/02, included references:
- S.E. Benzley and Z.E. Beisinger:
  CHILES - A Finite Element Computer Program that Calculates the
  Intensities of Linear Elastic Singularities
  SLA-73-0894 (September 1973).
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11. MACHINE REQUIREMENTS:
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NESC0611/01 FORTRAN-IV
NESC0611/02 FORTRAN-IV
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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:   SCOPE 3.3.
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:
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15. NAME AND ESTABLISHMENT OF AUTHORS

                 S. E. Benzley and Z. E. Beisinger
                 Analytical Development Division 1541
                 Sandia Laboratories
                 P. O. Box 5800
                 Albuquerque, New Mexico  87115
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16. MATERIAL AVAILABLE
NESC0611/01
File name File description Records
NESC0611_01.001 SOURCE 1693
NESC0611_01.002 S.P. INPUT 218
NESC0611_01.003 S.P. OUTPUT 987
NESC0611/02
File name File description Records
NESC0611_02.002 INFORMATION FILE 7
NESC0611_02.003 JCL 22
NESC0611_02.004 SOURCE FORTRAN 1710
NESC0611_02.005 S.P. INPUT 218
NESC0611_02.006 S.P. OUTPUT 987
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17. CATEGORIES
  • I. Deformation and Stress Distributions, Structural Analysis and Engineering Design Studies

Keywords: elasticity, finite element method, fracture properties, numerical solution, solids, strains, stresses, two-dimensional.