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Numerical analysis of compressive residual stresses in metallic materials as a result of shot peening
Of significant importance to the design, manufacture and maintenance of turbine components is the fatigue life thereof when subjected to variable loading conditions. Research and practical implementation has shown that shot peening considerably increases the fatigue life of a component by introducin...
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| Format: | Thesis |
| Language: | English |
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Department of Mechanical Engineering
2015
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| _version_ | 1867614264289656832 |
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| access_status_str | Open Access |
| author | Gamiet, Nadeem |
| author_browse | Gamiet, Nadeem |
| author_facet | Gamiet, Nadeem |
| author_sort | Gamiet, Nadeem |
| collection | Thesis |
| description | Of significant importance to the design, manufacture and maintenance of turbine components is the fatigue life thereof when subjected to variable loading conditions. Research and practical implementation has shown that shot peening considerably increases the fatigue life of a component by introducing compressive residual stresses within the surface layers of the component. This has created a need to develop a numerical model that accurately predicts such residual stresses produced from shot peening. This thesis offers a simplified numerical model depiction of the shot peening process on a target material. A Finite Element based software (ABAQUS) model was employed to simulate the material behaviour and elastic-plastic deformation a metallic material undergoes during shot peening. An experimental platform was established by performing shot peening on material specimens while varying certain shot peening parameters. These parameters included shot size, shot velocity (related to a change in nozzle discharge pressure) as well as standoff (distance between exit nozzle and target material). The experimental data provided the stress profiles both on and beneath the target material surface layers and aided in the model development. Of specific interest was the magnitude of the maximum compressive residual stress developed just below the surface of the material and the depth of the compressive layer formed within the surface layers of the target material. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/13680 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:49:16.807Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2015 |
| publishDateRange | 2015 |
| publishDateSort | 2015 |
| publisher | Department of Mechanical Engineering |
| publisherStr | Department of Mechanical Engineering |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/13680 Numerical analysis of compressive residual stresses in metallic materials as a result of shot peening Gamiet, Nadeem Mechanical Engineering Of significant importance to the design, manufacture and maintenance of turbine components is the fatigue life thereof when subjected to variable loading conditions. Research and practical implementation has shown that shot peening considerably increases the fatigue life of a component by introducing compressive residual stresses within the surface layers of the component. This has created a need to develop a numerical model that accurately predicts such residual stresses produced from shot peening. This thesis offers a simplified numerical model depiction of the shot peening process on a target material. A Finite Element based software (ABAQUS) model was employed to simulate the material behaviour and elastic-plastic deformation a metallic material undergoes during shot peening. An experimental platform was established by performing shot peening on material specimens while varying certain shot peening parameters. These parameters included shot size, shot velocity (related to a change in nozzle discharge pressure) as well as standoff (distance between exit nozzle and target material). The experimental data provided the stress profiles both on and beneath the target material surface layers and aided in the model development. Of specific interest was the magnitude of the maximum compressive residual stress developed just below the surface of the material and the depth of the compressive layer formed within the surface layers of the target material. 2015-08-10T06:43:36Z 2015-08-10T06:43:36Z 2015 Master Thesis Masters MSc (Eng) http://hdl.handle.net/11427/13680 eng application/pdf Department of Mechanical Engineering Faculty of Engineering and the Built Environment University of Cape Town |
| spellingShingle | Mechanical Engineering Gamiet, Nadeem Numerical analysis of compressive residual stresses in metallic materials as a result of shot peening |
| thesis_degree_str | Master's |
| title | Numerical analysis of compressive residual stresses in metallic materials as a result of shot peening |
| title_full | Numerical analysis of compressive residual stresses in metallic materials as a result of shot peening |
| title_fullStr | Numerical analysis of compressive residual stresses in metallic materials as a result of shot peening |
| title_full_unstemmed | Numerical analysis of compressive residual stresses in metallic materials as a result of shot peening |
| title_short | Numerical analysis of compressive residual stresses in metallic materials as a result of shot peening |
| title_sort | numerical analysis of compressive residual stresses in metallic materials as a result of shot peening |
| topic | Mechanical Engineering |
| url | http://hdl.handle.net/11427/13680 |
| work_keys_str_mv | AT gamietnadeem numericalanalysisofcompressiveresidualstressesinmetallicmaterialsasaresultofshotpeening |