NESC0650 ELBOW-ORNL

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

NAME OR DESIGNATION OF PROGRAM, COMPUTER, DESCRIPTION OF PROBLEM OR FUNCTION, METHOD OF SOLUTION, RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM, TYPICAL RUNNING TIME, UNUSUAL FEATURES OF THE PROGRAM, RELATED AND AUXILIARY PROGRAMS, STATUS, REFERENCES, MACHINE REQUIREMENTS, LANGUAGE, OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED, OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS, NAME AND ESTABLISHMENT OF AUTHOR, MATERIAL, CATEGORIES

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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.