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[Program Service | Recent programs]

ESTS1049 NRCPIPES. (Abstract last modified 07-NOV-2005)


NRCPIPES, Fracture Mechanics of Cracked Pipes

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Abstract Table of Contents:

NAME | COMPUTER | PROBLEM | SOLUTION | RESTRICTIONS | CPU | FEATURES | AUXILIARIES | STATUS | REFERENCES | REQUIREMENTS | LANGUAGE | OPERATING SYSTEM | OTHER RESTRICTIONS | AUTHOR | MATERIAL | CATEGORIES |

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1. NAME OR DESIGNATION OF PROGRAM - NRCPIPES. 


2. COMPUTER FOR WHICH PROGRAM IS DESIGNED AND OTHER MACHINE VERSION PACKAGES AVAILABLE -

To request or retrieve programs click on the one of the active versions below. A password and special authorization is required.

Explanation of the status codes.

Program-name         Package-ID  Status
NRCPIPES2.0A         ESTS1049/01 Obsolete
NRCPIPES2.0A         ESTS1049/02 Tested

Machines used:
Package-ID     Orig.Computer                       Test Computer
ESTS1049/02    IBM PC                              PC Windows

3. DESCRIPTION OF PROGRAM OR FUNCTION - The NRCPIPES software is designed to perform elastic and elastic-plastic fracture mechanics analysis for a circumferential surface cracked pipe, i.e., to establish the fracture-failure condition in terms of sustainable load (or stress) or displacement. The NRCPIPES software also includes several evaluation procedures and acceptance criteria for circumferential surface flaws based on the ASME Boiler and Pressure Vessel Code, Section XI criteria, the British R6 Revision 3 Option 1 criteria, and the original Net-Section-Collapse (limit-load) analysis.


4. METHOD OF SOLUTION - The fracture mechanics analysis in NRCPIPES is based on J-integral estimation schemes, the R6 Option 1 method, the SC.TNP, SC.TKP, and SC.ENG J-estimation scheme methods developed at Battelle, and the Battelle Dimensionless Plastic-Zone Parameter (DPZP) method. The ASME allowable calculations are based on Rules of ASME Section XI, Division I, Appendices H and C and on Code Case N-494-2 of the Acceptance Standards of IWB-3514.2, Section XI, Division I, ASME. The original Net-Section-Collapse (limit-load) analysis is also included. The software is constructed in a modular manner.


5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM - NRCPIPES requires 512 KB of conventional memory and an organized structure. Software can only be executed from the main NRCPIPES/VER2 directory.
J-resitance curve may be defined of atmost 40 crack growth and J-mat pairs.


6. TYPICAL RUNNING TIME - Run time requirements depend highly on the type of PC but all runs require a few seconds.


7. UNUSUAL FEATURES OF THE PROGRAM - NRCPIPES is mainly an interactive system with the user guided through a series of friendly menus. The J-estimation schemes provide a quick fracture mechanics analysis compared to more costly and time consuming methods such as finite element methods (numerical methods).


8. RELATED AND AUXILIARY PROGRAMS - The original version of the software was developed for a VAX computer and contained other types of crack geometries and structures such as a center-cracked panel, etc. No other software required.


9. STATUS
ESTS1049/01: 07-NOV-2005 Obsolete
ESTS1049/02: 07-NOV-2005 Tested at NEADB


10. REFERENCES  - 
ESTS1049/02:
- NRCPIPES (Version 2.0a), A Personal Computer Code for
Circumferential Surface Cracked Piping Fracture Mechanics Analysis
User's Guide (March 6, 1995)


11. MACHINE REQUIREMENTS - IBM personal computer and compatibles. DOS operating system (2.0 or higher).


12. PROGRAMMING LANGUAGE(S) USED -
ESTS1049/02: BASIC 


13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED - DOS and Windows.


14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS - In order to execute the NRCPIPES program, the user must be in the NRCPIPES/VER2 directory. NRCPIPES cannot be executed from other directories or sub-directories. During execution, the user may use other directories to supply/store input-output data. Source code is included only in the manual.


15. NAME AND ESTABLISHMENT OF AUTHORS - 
   N. Ghadiali, G. Wilkowski, F. Brust, P. Scott, P. Krishnaswamy, 
   S. Rahman 
   Battelle Memorial Institute, Columbus, OH (United States) 


16. MATERIAL AVAILABLE -
ESTS1049/02:
NRCPIPES executable file
*.LEM files contain the definition of linear extrapolated modified J-Resistance
curves 
*.PLD files contain the definition of power law extrapolated deformation
J-Resistance curves
Output files
Screen output files
Input files for the sample problem calculation
Documentation in PDF format


17. CATEGORIES  - 

- I. Deformation and Stress Distributions, Structural Analysis and Engineering Design Studies


Keywords: CRACKING, DEFORMATION, FRACTURE PROPERTIES, PIPES, STRESS ANALYSIS

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