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NESC0650 ELBOW-ORNL

ELBOW, Stress Analysis, Flexibility Factors for Curved Pipes with Internal Pressure

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1. NAME OR DESIGNATION OF PROGRAM:  ELBOW-ORNL
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2. COMPUTERS
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Program name Package id Status Status date
ELBOW-ORNL NESC0650/01 Tested 01-SEP-1977

Machines used:

Package ID Orig. computer Test computer
NESC0650/01 IBM 370 series IBM 370 series
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3. DESCRIPTION OF PROBLEM OR FUNCTION

ELBOW-ORNL   calculates   the
stresses, stress indices, and flexibility factors for in-plane and
out-of-plane  bending  of  elbows and  curved  pipe  subjected  to
internal pressure.  Comparison with experiments indicates that the
results accurately represent  the maximum stresses which  occur at
the center of the bend.
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4. METHOD OF SOLUTION

Results  are obtained  using a  trigonometric
series solution,  which is  a modified  version of  the method  of
Rodabaugh  and  George  to include  a  correction  for  transverse
compression recommended by Gross.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

The  program  does
not account for the effects  of end restraint or out-of-roundness.
Since end-effects  are not included,  the calculated  stresses and
flexibility of the elbow may be larger than the actual values.
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6. TYPICAL RUNNING TIME

Approximately  15 seconds  are required  to
execute the sample problem.
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7. UNUSUAL FEATURES OF THE PROGRAM:
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8. RELATED AND AUXILIARY PROGRAMS:
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9. STATUS
Package ID Status date Status
NESC0650/01 01-SEP-1977 Tested at NEADB
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10. REFERENCES

- W.G.Dodge and S.E. Moore:
  ELBOW - A FORTRAN Program for the Calculation of Stresses, Stress
  Indices, and Flexibility Factors for Elbows and Curved Pipe
  ORNL-TM-4098 (April 1973).
- W.G. Dodge and S.E. Moore:
  Stress Indices and Flexibility Factors for Moment Loadings on
  Elbows and Curved Pipe
  ORNL-TM-3658 (March 1972).
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11. MACHINE REQUIREMENTS:  80K bytes of core storage
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NESC0650/01 FORTRAN+ASSEMBLER
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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:   OS/360.
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:
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15. NAME AND ESTABLISHMENT OF AUTHOR

                 W. G. Dodge
                 Oak Ridge National Laboratory
                 P. O. Box X
                 Oak Ridge, Tennessee  37830
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16. MATERIAL AVAILABLE
NESC0650/01
File name File description Records
NESC0650_01.001 ELBOW SOURCE PROGRAM - F4 EBCDIC 551
NESC0650_01.002 ELBOW SOURCE - ASSEMBLER 156
NESC0650_01.003 ELBOW SAMPLE PROBLEM INPUT DATA 3
NESC0650_01.004 ELBOW SAMPLE PROBLEM PRINTED OUTPUT 201
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17. CATEGORIES
  • I. Deformation and Stress Distributions, Structural Analysis and Engineering Design Studies

Keywords: bending, flexibility, pipes, stresses.