Comparison of material flow stress models toward more realistic simulations of friction stir processes of Mg AZ31B
Utilizing a proper material model for describing the mechanical behavior of any material is key for a successful simulation of friction stir processing (FSP) where temperature, strain, and strain rate gradients vary abruptly within, and when moving away, from the stirring zone. This work presents a...
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| مؤلفون آخرون: | |
| التنسيق: | article |
| منشور في: |
2013
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| الوصول للمادة أونلاين: | http://hdl.handle.net/10725/7154 http://dx.doi.org/10.4028/www.scientific.net/AMR.922.18 http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php https://www.scientific.net/AMR.922.18 |
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| _version_ | 1864513481695297536 |
|---|---|
| author | Ammouri, A. H. |
| author2 | Hamade, R.F. |
| author2_role | author |
| author_facet | Ammouri, A. H. Hamade, R.F. |
| author_role | author |
| dc.creator.none.fl_str_mv | Ammouri, A. H. Hamade, R.F. |
| dc.date.none.fl_str_mv | 2013 2018-02-27T12:12:59Z 2018-02-27T12:12:59Z 2018-02-27 |
| dc.identifier.none.fl_str_mv | 1662-8985 http://hdl.handle.net/10725/7154 http://dx.doi.org/10.4028/www.scientific.net/AMR.922.18 Ammouri, A. H., & Hamade, R. F. (2014). Comparison of Material Flow Stress Models Toward More Realistic Simulations of Friction Stir Processes of Mg AZ31B. In Advanced Materials Research (Vol. 922, pp. 18-22). Trans Tech Publications. http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php https://www.scientific.net/AMR.922.18 |
| dc.language.none.fl_str_mv | en |
| dc.relation.none.fl_str_mv | Advanced Materials Research |
| dc.rights.*.fl_str_mv | info:eu-repo/semantics/openAccess |
| dc.title.none.fl_str_mv | Comparison of material flow stress models toward more realistic simulations of friction stir processes of Mg AZ31B |
| dc.type.none.fl_str_mv | Article info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/article |
| description | Utilizing a proper material model for describing the mechanical behavior of any material is key for a successful simulation of friction stir processing (FSP) where temperature, strain, and strain rate gradients vary abruptly within, and when moving away, from the stirring zone. This work presents a comparison of how faithfully do three different constitutive equations reproduce the state variables of strain, strain rate, and temperature in an FEM simulation of a test-case FSP (1000 rpm spindle speed, and 90 mm/min feed). The three material models considered in this comparison are namely: Johnson-Cook (JC), Sellars-Tegart (ST), and Zerilli-Armstrong (ZA). Constants for these constitutive equations are obtained by fitting these equations to experimental mechanical behavior data collected under a range of strain rates and temperatures of twin-rolled cast wrought AZ31B sheets.It is widely recognized that JC-based models over predicts stress values in the stir zone whereas ST-based models are incapable of capturing work hardening outside of the stir zone. Therefore, a ZA model, being a physical based-HCP specific model, is hereby investigated for its suitability as a material model that would overcome such drawbacks of JC-and ST-based models. The equations from the constitutive models under consideration are fed into an FEM model built using DEFORM 3D to simulate the traverse phases of a friction stir process. Amongst these three material models, comparison results suggest that the HCP-specific ZA model yield better predictions of the state variables: strain, strain rate, and temperature, and, consequently, the estimated values for flow stresses. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | LAURepo_635b4ddebcd10c56ef11da50782e1124 |
| identifier_str_mv | 1662-8985 Ammouri, A. H., & Hamade, R. F. (2014). Comparison of Material Flow Stress Models Toward More Realistic Simulations of Friction Stir Processes of Mg AZ31B. In Advanced Materials Research (Vol. 922, pp. 18-22). Trans Tech Publications. |
| language_invalid_str_mv | en |
| network_acronym_str | LAURepo |
| network_name_str | Lebanese American University repository |
| oai_identifier_str | oai:laur.lau.edu.lb:10725/7154 |
| publishDate | 2013 |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| spelling | Comparison of material flow stress models toward more realistic simulations of friction stir processes of Mg AZ31BAmmouri, A. H.Hamade, R.F.Utilizing a proper material model for describing the mechanical behavior of any material is key for a successful simulation of friction stir processing (FSP) where temperature, strain, and strain rate gradients vary abruptly within, and when moving away, from the stirring zone. This work presents a comparison of how faithfully do three different constitutive equations reproduce the state variables of strain, strain rate, and temperature in an FEM simulation of a test-case FSP (1000 rpm spindle speed, and 90 mm/min feed). The three material models considered in this comparison are namely: Johnson-Cook (JC), Sellars-Tegart (ST), and Zerilli-Armstrong (ZA). Constants for these constitutive equations are obtained by fitting these equations to experimental mechanical behavior data collected under a range of strain rates and temperatures of twin-rolled cast wrought AZ31B sheets.It is widely recognized that JC-based models over predicts stress values in the stir zone whereas ST-based models are incapable of capturing work hardening outside of the stir zone. Therefore, a ZA model, being a physical based-HCP specific model, is hereby investigated for its suitability as a material model that would overcome such drawbacks of JC-and ST-based models. The equations from the constitutive models under consideration are fed into an FEM model built using DEFORM 3D to simulate the traverse phases of a friction stir process. Amongst these three material models, comparison results suggest that the HCP-specific ZA model yield better predictions of the state variables: strain, strain rate, and temperature, and, consequently, the estimated values for flow stresses.PublishedN/A2018-02-27T12:12:59Z2018-02-27T12:12:59Z20132018-02-27Articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1662-8985http://hdl.handle.net/10725/7154http://dx.doi.org/10.4028/www.scientific.net/AMR.922.18Ammouri, A. H., & Hamade, R. F. (2014). Comparison of Material Flow Stress Models Toward More Realistic Simulations of Friction Stir Processes of Mg AZ31B. In Advanced Materials Research (Vol. 922, pp. 18-22). Trans Tech Publications.http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.phphttps://www.scientific.net/AMR.922.18enAdvanced Materials Researchinfo:eu-repo/semantics/openAccessoai:laur.lau.edu.lb:10725/71542021-03-19T10:03:31Z |
| spellingShingle | Comparison of material flow stress models toward more realistic simulations of friction stir processes of Mg AZ31B Ammouri, A. H. |
| status_str | publishedVersion |
| title | Comparison of material flow stress models toward more realistic simulations of friction stir processes of Mg AZ31B |
| title_full | Comparison of material flow stress models toward more realistic simulations of friction stir processes of Mg AZ31B |
| title_fullStr | Comparison of material flow stress models toward more realistic simulations of friction stir processes of Mg AZ31B |
| title_full_unstemmed | Comparison of material flow stress models toward more realistic simulations of friction stir processes of Mg AZ31B |
| title_short | Comparison of material flow stress models toward more realistic simulations of friction stir processes of Mg AZ31B |
| title_sort | Comparison of material flow stress models toward more realistic simulations of friction stir processes of Mg AZ31B |
| url | http://hdl.handle.net/10725/7154 http://dx.doi.org/10.4028/www.scientific.net/AMR.922.18 http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php https://www.scientific.net/AMR.922.18 |