Full Text Available
Note: Clicking the button above will open the full text document at the original institutional repository in a new window.
Determination of shakedown boundary and fitness-assessment-diagrams of cracked pipe bends
Determination of shakedown boundaries of 90-degree defect-free smooth pipe bends has received substantial attention by several researchers within the recent decades. However, scarce information is found within the literature regarding the determination of the shakedown boundary of cracked pipe bends...
Saved in:
| Main Author: | |
|---|---|
| Format: | Thesis |
| Published: |
AUC Knowledge Fountain
2012
|
| Subjects: | |
| Tags: |
No Tags, Be the first to tag this record!
|
| _version_ | 1867613417222701056 |
|---|---|
| access_status_str | Open Access |
| author | ElSaadany, Mostafa |
| author_browse | ElSaadany, Mostafa |
| author_facet | ElSaadany, Mostafa |
| author_sort | ElSaadany, Mostafa |
| collection | Thesis |
| dc_rights_str_mv | The author retains all rights with regard to copyright. The author certifies that written permission from the owner(s) of third-party copyrighted matter included in the thesis, dissertation, paper, or record of study has been obtained. The author further certifies that IRB approval has been obtained for this thesis, or that IRB approval is not necessary for this thesis. Insofar as this thesis, dissertation, paper, or record of study is an educational record as defined in the Family Educational Rights and Privacy Act (FERPA) (20 USC 1232g), the author has granted consent to disclosure of it to anyone who requests a copy. |
| description | Determination of shakedown boundaries of 90-degree defect-free smooth pipe bends has received substantial attention by several researchers within the recent decades. However, scarce information is found within the literature regarding the determination of the shakedown boundary of cracked pipe bends. The current research outcomes include the determination of shakedown boundary for a circumferentially cracked 90-degree pipe bend via a simplified technique utilizing the finite element method, and introduction of Failure-Assessment-Diagrams (FAD) in compliance with the API 579 Failure-for-Service assessment of pressure vessel and piping components. The analyzed cracked pipe bend is subjected to the combined effect of steady internal pressure spectrum and cyclic In-Plane Closing (IPC) or opening (IPO) bending moments. Line Spring Elements (LSE) are embedded in quadratic shell elements to model part through cracks. Failure assessment diagrams (FAD) are developed through linking the J-integral fracture mechanics parameter with the shakedown limit moments of the analyzed cracked 90-degree pipe bend. The LSE outcomes illustrated satisfactory results in comparison to the results of verification studies: stress intensity factor, Shakedown (SD) limit, and limit load. Additionally, full elastic-plastic cyclic loading finite element analyses are conducted and the outcomes revealed good correlation with the results obtained via the simplified technique. The maximum load carrying capacity (limit moment) and the elastic domain are also computed thereby generating a Bree diagram for the cracked pipe bend. |
| format | Thesis |
| id | oai:fount.aucegypt.edu:etds-2267 |
| institution | American University in Cairo (Egypt) |
| last_indexed | 2026-06-10T12:35:48.888Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from AUC Knowledge Fountain — bepress |
| publishDate | 2012 |
| publishDateRange | 2012 |
| publishDateSort | 2012 |
| publisher | AUC Knowledge Fountain |
| publisherStr | AUC Knowledge Fountain |
| record_format | dspace |
| source_str | AUC Knowledge Fountain — bepress |
| spelling | oai:fount.aucegypt.edu:etds-2267 Determination of shakedown boundary and fitness-assessment-diagrams of cracked pipe bends ElSaadany, Mostafa Determination of shakedown boundaries of 90-degree defect-free smooth pipe bends has received substantial attention by several researchers within the recent decades. However, scarce information is found within the literature regarding the determination of the shakedown boundary of cracked pipe bends. The current research outcomes include the determination of shakedown boundary for a circumferentially cracked 90-degree pipe bend via a simplified technique utilizing the finite element method, and introduction of Failure-Assessment-Diagrams (FAD) in compliance with the API 579 Failure-for-Service assessment of pressure vessel and piping components. The analyzed cracked pipe bend is subjected to the combined effect of steady internal pressure spectrum and cyclic In-Plane Closing (IPC) or opening (IPO) bending moments. Line Spring Elements (LSE) are embedded in quadratic shell elements to model part through cracks. Failure assessment diagrams (FAD) are developed through linking the J-integral fracture mechanics parameter with the shakedown limit moments of the analyzed cracked 90-degree pipe bend. The LSE outcomes illustrated satisfactory results in comparison to the results of verification studies: stress intensity factor, Shakedown (SD) limit, and limit load. Additionally, full elastic-plastic cyclic loading finite element analyses are conducted and the outcomes revealed good correlation with the results obtained via the simplified technique. The maximum load carrying capacity (limit moment) and the elastic domain are also computed thereby generating a Bree diagram for the cracked pipe bend. 2012-06-01T07:00:00Z thesis application/pdf https://fount.aucegypt.edu/etds/1268 https://fount.aucegypt.edu/context/etds/article/2267/viewcontent/Thesis__20Mostafa_20Siam.pdf The author retains all rights with regard to copyright. The author certifies that written permission from the owner(s) of third-party copyrighted matter included in the thesis, dissertation, paper, or record of study has been obtained. The author further certifies that IRB approval has been obtained for this thesis, or that IRB approval is not necessary for this thesis. Insofar as this thesis, dissertation, paper, or record of study is an educational record as defined in the Family Educational Rights and Privacy Act (FERPA) (20 USC 1232g), the author has granted consent to disclosure of it to anyone who requests a copy. Theses and Dissertations AUC Knowledge Fountain Pipe joints Pipelines--Cracking |
| spellingShingle | Pipe joints Pipelines--Cracking ElSaadany, Mostafa Determination of shakedown boundary and fitness-assessment-diagrams of cracked pipe bends |
| title | Determination of shakedown boundary and fitness-assessment-diagrams of cracked pipe bends |
| title_full | Determination of shakedown boundary and fitness-assessment-diagrams of cracked pipe bends |
| title_fullStr | Determination of shakedown boundary and fitness-assessment-diagrams of cracked pipe bends |
| title_full_unstemmed | Determination of shakedown boundary and fitness-assessment-diagrams of cracked pipe bends |
| title_short | Determination of shakedown boundary and fitness-assessment-diagrams of cracked pipe bends |
| title_sort | determination of shakedown boundary and fitness assessment diagrams of cracked pipe bends |
| topic | Pipe joints Pipelines--Cracking |
| url | https://fount.aucegypt.edu/etds/1268 https://fount.aucegypt.edu/context/etds/article/2267/viewcontent/Thesis__20Mostafa_20Siam.pdf |
| work_keys_str_mv | AT elsaadanymostafa determinationofshakedownboundaryandfitnessassessmentdiagramsofcrackedpipebends |