Dynamic Characteristics and Effective Stiffness Properties of Sandwich Panels with Hierarchical Hexagonal Honeycomb
The dynamic characteristics of sandwich panels with a hierarchical hexagonal honeycomb (SP-HHHs) show significant improvements due to their distinct hierarchy configurations. However, this also increases the complexity of structural analysis. To address this issue, the variational asymptotic method...
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MDPI AG
2023-08-01
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| Online Access: | https://www.mdpi.com/1996-1944/16/17/5741 |
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| author | Zixuan Bai Cheng Chen Xinlong Yang Yifeng Zhong Rong Liu |
| author_facet | Zixuan Bai Cheng Chen Xinlong Yang Yifeng Zhong Rong Liu |
| author_sort | Zixuan Bai |
| collection | DOAJ |
| description | The dynamic characteristics of sandwich panels with a hierarchical hexagonal honeycomb (SP-HHHs) show significant improvements due to their distinct hierarchy configurations. However, this also increases the complexity of structural analysis. To address this issue, the variational asymptotic method was utilized to homogenize the unit cell of the SP-HHH and obtain the equivalent stiffness, establishing a two-dimensional equivalent plate model (2D-EPM). The accuracy and effectiveness of the 2D-EPM were then verified through comparisons with the results from a detailed 3D FE model in terms of the free vibration and frequency- and time-domain forced vibration, as well as through local field recovery analysis at peak and trough times. Furthermore, the tailorability of the typical unit cell was utilized to perform a parametric analysis of the effects of the length and thickness ratios of the first-order hierarchy on the dynamic characteristics of the SP-HHH under periodic loading. The results reveal that the vertices serve as weak points in the SP-HHH, while the vertex cell pattern significantly influences the specific stiffness and stiffness characteristics of the panel. The SP-HHH with hexagonal vertex cells has superior specific stiffness compared to panels with circular and rectangular vertex cells, resulting in a more lightweight design and enhanced stiffness. |
| first_indexed | 2024-03-10T23:19:38Z |
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| id | doaj.art-9578ce1a1cab4e6ba0faa48073ea6bcb |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T23:19:38Z |
| publishDate | 2023-08-01 |
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| spelling | doaj.art-9578ce1a1cab4e6ba0faa48073ea6bcb2023-11-19T08:25:16ZengMDPI AGMaterials1996-19442023-08-011617574110.3390/ma16175741Dynamic Characteristics and Effective Stiffness Properties of Sandwich Panels with Hierarchical Hexagonal HoneycombZixuan Bai0Cheng Chen1Xinlong Yang2Yifeng Zhong3Rong Liu4School of Civil Engineering, Chongqing University, Chongqing 400045, ChinaSchool of Civil Engineering, Chongqing University, Chongqing 400045, ChinaSchool of Civil Engineering, Chongqing University, Chongqing 400045, ChinaSchool of Civil Engineering, Chongqing University, Chongqing 400045, ChinaSchool of Civil Engineering, Chongqing University, Chongqing 400045, ChinaThe dynamic characteristics of sandwich panels with a hierarchical hexagonal honeycomb (SP-HHHs) show significant improvements due to their distinct hierarchy configurations. However, this also increases the complexity of structural analysis. To address this issue, the variational asymptotic method was utilized to homogenize the unit cell of the SP-HHH and obtain the equivalent stiffness, establishing a two-dimensional equivalent plate model (2D-EPM). The accuracy and effectiveness of the 2D-EPM were then verified through comparisons with the results from a detailed 3D FE model in terms of the free vibration and frequency- and time-domain forced vibration, as well as through local field recovery analysis at peak and trough times. Furthermore, the tailorability of the typical unit cell was utilized to perform a parametric analysis of the effects of the length and thickness ratios of the first-order hierarchy on the dynamic characteristics of the SP-HHH under periodic loading. The results reveal that the vertices serve as weak points in the SP-HHH, while the vertex cell pattern significantly influences the specific stiffness and stiffness characteristics of the panel. The SP-HHH with hexagonal vertex cells has superior specific stiffness compared to panels with circular and rectangular vertex cells, resulting in a more lightweight design and enhanced stiffness.https://www.mdpi.com/1996-1944/16/17/5741sandwich panelhierarchical hexagonal honeycombequivalent stiffness propertiesdynamic characteristicsvariational asymptotic analysis |
| spellingShingle | Zixuan Bai Cheng Chen Xinlong Yang Yifeng Zhong Rong Liu Dynamic Characteristics and Effective Stiffness Properties of Sandwich Panels with Hierarchical Hexagonal Honeycomb Materials sandwich panel hierarchical hexagonal honeycomb equivalent stiffness properties dynamic characteristics variational asymptotic analysis |
| title | Dynamic Characteristics and Effective Stiffness Properties of Sandwich Panels with Hierarchical Hexagonal Honeycomb |
| title_full | Dynamic Characteristics and Effective Stiffness Properties of Sandwich Panels with Hierarchical Hexagonal Honeycomb |
| title_fullStr | Dynamic Characteristics and Effective Stiffness Properties of Sandwich Panels with Hierarchical Hexagonal Honeycomb |
| title_full_unstemmed | Dynamic Characteristics and Effective Stiffness Properties of Sandwich Panels with Hierarchical Hexagonal Honeycomb |
| title_short | Dynamic Characteristics and Effective Stiffness Properties of Sandwich Panels with Hierarchical Hexagonal Honeycomb |
| title_sort | dynamic characteristics and effective stiffness properties of sandwich panels with hierarchical hexagonal honeycomb |
| topic | sandwich panel hierarchical hexagonal honeycomb equivalent stiffness properties dynamic characteristics variational asymptotic analysis |
| url | https://www.mdpi.com/1996-1944/16/17/5741 |
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