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A proposed simplified API 579 assessment procedure for shakedown limit load determination with application to locally thinned wall pipe-branch connections
In the current research, a new assessment procedure is proposed to determine the shakedown limit load of locally thinned wall pressurized components via modifying the current API 579 level-three assessment. The new assessment procedure applies a well-established and verified simplified technique, pr...
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| Format: | Thesis |
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AUC Knowledge Fountain
2013
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| _version_ | 1867613417299247104 |
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| access_status_str | Open Access |
| author | Hafiz, Youssef |
| author_browse | Hafiz, Youssef |
| author_facet | Hafiz, Youssef |
| author_sort | Hafiz, Youssef |
| 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 | In the current research, a new assessment procedure is proposed to determine the shakedown limit load of locally thinned wall pressurized components via modifying the current API 579 level-three assessment. The new assessment procedure applies a well-established and verified simplified technique, previously developed by Abdalla et al. [1], discarding iterative full elastic-plastic cyclic loading finite element (FE) analyses. For the purpose of validation, the newly proposed assessment procedure is applied to generate the shakedown boundary of a locally thinned wall pipe-branch connection subjected to a spectrum of steady internal pressures and cyclic bending moments. The outcomes of the proposed assessment procedure are successfully verified against existing API 579 assessment procedures, numerical analyses, and experimental outcomes taken from the literature. Interaction (Bree) diagrams illustrating elastic, shakedown, and limit load domains are constructed for the locally thinned wall pipe-branch connection problem. Additionally, a parametric study is performed through changing the both the depth and location of the local wall thinning within the pipe-branch connection. The outcomes of the parametric study show good agreement in the shakedown limit boundary results with the API 579 elastic-plastic stress analysis procedure. |
| format | Thesis |
| id | oai:fount.aucegypt.edu:etds-2276 |
| 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 | 2013 |
| publishDateRange | 2013 |
| publishDateSort | 2013 |
| publisher | AUC Knowledge Fountain |
| publisherStr | AUC Knowledge Fountain |
| record_format | dspace |
| source_str | AUC Knowledge Fountain — bepress |
| spelling | oai:fount.aucegypt.edu:etds-2276 A proposed simplified API 579 assessment procedure for shakedown limit load determination with application to locally thinned wall pipe-branch connections Hafiz, Youssef In the current research, a new assessment procedure is proposed to determine the shakedown limit load of locally thinned wall pressurized components via modifying the current API 579 level-three assessment. The new assessment procedure applies a well-established and verified simplified technique, previously developed by Abdalla et al. [1], discarding iterative full elastic-plastic cyclic loading finite element (FE) analyses. For the purpose of validation, the newly proposed assessment procedure is applied to generate the shakedown boundary of a locally thinned wall pipe-branch connection subjected to a spectrum of steady internal pressures and cyclic bending moments. The outcomes of the proposed assessment procedure are successfully verified against existing API 579 assessment procedures, numerical analyses, and experimental outcomes taken from the literature. Interaction (Bree) diagrams illustrating elastic, shakedown, and limit load domains are constructed for the locally thinned wall pipe-branch connection problem. Additionally, a parametric study is performed through changing the both the depth and location of the local wall thinning within the pipe-branch connection. The outcomes of the parametric study show good agreement in the shakedown limit boundary results with the API 579 elastic-plastic stress analysis procedure. 2013-02-01T08:00:00Z thesis application/pdf https://fount.aucegypt.edu/etds/1277 https://fount.aucegypt.edu/context/etds/article/2276/viewcontent/Youssef_20thesis3.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 Strains and stresses Structural alysis (Engineering) |
| spellingShingle | Strains and stresses Structural alysis (Engineering) Hafiz, Youssef A proposed simplified API 579 assessment procedure for shakedown limit load determination with application to locally thinned wall pipe-branch connections |
| title | A proposed simplified API 579 assessment procedure for shakedown limit load determination with application to locally thinned wall pipe-branch connections |
| title_full | A proposed simplified API 579 assessment procedure for shakedown limit load determination with application to locally thinned wall pipe-branch connections |
| title_fullStr | A proposed simplified API 579 assessment procedure for shakedown limit load determination with application to locally thinned wall pipe-branch connections |
| title_full_unstemmed | A proposed simplified API 579 assessment procedure for shakedown limit load determination with application to locally thinned wall pipe-branch connections |
| title_short | A proposed simplified API 579 assessment procedure for shakedown limit load determination with application to locally thinned wall pipe-branch connections |
| title_sort | proposed simplified api 579 assessment procedure for shakedown limit load determination with application to locally thinned wall pipe branch connections |
| topic | Strains and stresses Structural alysis (Engineering) |
| url | https://fount.aucegypt.edu/etds/1277 https://fount.aucegypt.edu/context/etds/article/2276/viewcontent/Youssef_20thesis3.pdf |
| work_keys_str_mv | AT hafizyoussef aproposedsimplifiedapi579assessmentprocedureforshakedownlimitloaddeterminationwithapplicationtolocallythinnedwallpipebranchconnections AT hafizyoussef proposedsimplifiedapi579assessmentprocedureforshakedownlimitloaddeterminationwithapplicationtolocallythinnedwallpipebranchconnections |