Plastic Forming of Sandwich Panels and Numerical Analyses of the Forming Processes Based on Elastoplastic Equivalent Model
This paper studies the plastic forming of sandwich panels and proposes a universal elastoplastic equivalent method suitable for sandwich panels. To verify the generality of the equivalent method, according to the different core structures, the cores of bi-directional trapezoidal sandwich (BTS) panel...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-08-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/14/17/4955 |
| _version_ | 1797521195326767104 |
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| author | Ya Zhang Qingmin Chen Mingwei Wang Xi Zhang Zhongyi Cai |
| author_facet | Ya Zhang Qingmin Chen Mingwei Wang Xi Zhang Zhongyi Cai |
| author_sort | Ya Zhang |
| collection | DOAJ |
| description | This paper studies the plastic forming of sandwich panels and proposes a universal elastoplastic equivalent method suitable for sandwich panels. To verify the generality of the equivalent method, according to the different core structures, the cores of bi-directional trapezoidal sandwich (BTS) panels and aluminum foam sandwich (AFS) panels are equated to orthotropic and isotropic (special orthotropic) single-layer panels respectively. Through the finite element (FE) numerical simulation of the mesoscopic model of the sandwich panel, the elastoplastic constitutive relationship of the equivalent core model is established, and then the macroscopic equivalent model of the sandwich panel is established. The FE numerical simulation of plastic forming was carried out for the mesoscopic model and equivalent model of BTS panel and AFS panel, and plastic forming experiments were conducted for the sandwich panel through a multi-point forming (MPF) test machine. The results show that the relative errors of the section average stress at the same position of the equivalent model and the mesoscopic model of sandwich panels are all within 4%; compared with the experimental results, the equivalent model of the sandwich panel has high forming accuracy and small shape error, which verifies the high accuracy and generality of the equivalent method. Moreover, using the sandwich panel equivalent model effectively reduces the calculation time of the numerical simulation. |
| first_indexed | 2024-03-10T08:08:12Z |
| format | Article |
| id | doaj.art-cadf3916104649c6b23dca7382073a8b |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T08:08:12Z |
| publishDate | 2021-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-cadf3916104649c6b23dca7382073a8b2023-11-22T10:54:08ZengMDPI AGMaterials1996-19442021-08-011417495510.3390/ma14174955Plastic Forming of Sandwich Panels and Numerical Analyses of the Forming Processes Based on Elastoplastic Equivalent ModelYa Zhang0Qingmin Chen1Mingwei Wang2Xi Zhang3Zhongyi Cai4College of Materials Science and Engineering, Jilin University, Changchun 130025, ChinaRoll Forging Research Institute, Jilin University, Changchun 130025, ChinaCollege of Materials Science and Engineering, Jilin University, Changchun 130025, ChinaCollege of Materials Science and Engineering, Jilin University, Changchun 130025, ChinaCollege of Materials Science and Engineering, Jilin University, Changchun 130025, ChinaThis paper studies the plastic forming of sandwich panels and proposes a universal elastoplastic equivalent method suitable for sandwich panels. To verify the generality of the equivalent method, according to the different core structures, the cores of bi-directional trapezoidal sandwich (BTS) panels and aluminum foam sandwich (AFS) panels are equated to orthotropic and isotropic (special orthotropic) single-layer panels respectively. Through the finite element (FE) numerical simulation of the mesoscopic model of the sandwich panel, the elastoplastic constitutive relationship of the equivalent core model is established, and then the macroscopic equivalent model of the sandwich panel is established. The FE numerical simulation of plastic forming was carried out for the mesoscopic model and equivalent model of BTS panel and AFS panel, and plastic forming experiments were conducted for the sandwich panel through a multi-point forming (MPF) test machine. The results show that the relative errors of the section average stress at the same position of the equivalent model and the mesoscopic model of sandwich panels are all within 4%; compared with the experimental results, the equivalent model of the sandwich panel has high forming accuracy and small shape error, which verifies the high accuracy and generality of the equivalent method. Moreover, using the sandwich panel equivalent model effectively reduces the calculation time of the numerical simulation.https://www.mdpi.com/1996-1944/14/17/4955sandwich panelsplastic formingequivalent modelorthotropy |
| spellingShingle | Ya Zhang Qingmin Chen Mingwei Wang Xi Zhang Zhongyi Cai Plastic Forming of Sandwich Panels and Numerical Analyses of the Forming Processes Based on Elastoplastic Equivalent Model Materials sandwich panels plastic forming equivalent model orthotropy |
| title | Plastic Forming of Sandwich Panels and Numerical Analyses of the Forming Processes Based on Elastoplastic Equivalent Model |
| title_full | Plastic Forming of Sandwich Panels and Numerical Analyses of the Forming Processes Based on Elastoplastic Equivalent Model |
| title_fullStr | Plastic Forming of Sandwich Panels and Numerical Analyses of the Forming Processes Based on Elastoplastic Equivalent Model |
| title_full_unstemmed | Plastic Forming of Sandwich Panels and Numerical Analyses of the Forming Processes Based on Elastoplastic Equivalent Model |
| title_short | Plastic Forming of Sandwich Panels and Numerical Analyses of the Forming Processes Based on Elastoplastic Equivalent Model |
| title_sort | plastic forming of sandwich panels and numerical analyses of the forming processes based on elastoplastic equivalent model |
| topic | sandwich panels plastic forming equivalent model orthotropy |
| url | https://www.mdpi.com/1996-1944/14/17/4955 |
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