Study on flexural resilience of composite foam sandwich structures under hygrothermal environment
Under hygrothermal environments, the structural stability and strength of all-fiber composite aircraft are significantly affected during long-term flight use. The wing skin, as a critical structural component, plays a vital role in bearing and transmitting aerodynamic loads. Therefore, it is crucial...
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2024-12-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/5.0230348 |
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| author | Di Gai Shiyu Yang Hai Xu Kang Yang Zhipeng Yao Shengjie Yu Yanhe Chen |
| author_facet | Di Gai Shiyu Yang Hai Xu Kang Yang Zhipeng Yao Shengjie Yu Yanhe Chen |
| author_sort | Di Gai |
| collection | DOAJ |
| description | Under hygrothermal environments, the structural stability and strength of all-fiber composite aircraft are significantly affected during long-term flight use. The wing skin, as a critical structural component, plays a vital role in bearing and transmitting aerodynamic loads. Therefore, it is crucial to investigate the structural compressive stability and strength of the wing skin throughout the aircraft's entire life cycle under these conditions. This study employs a real wing carbon fiber foam sandwich structure to investigate the compressive stability and strength of the wing skin structure of a new energy aircraft under actual flight conditions, specifically during the entire process of the room temperature dry state (RTD) and elevated temperature wet state (ETW). Initially, three-point bending tests were conducted on carbon fiber reinforced polymer (CFRP) laminates, foam cores, and CFRP reinforced foam sandwich structures. The CFRP laminates fully rebounded after bending damage in both the RTD and ETW environments. While CFRP reinforced foam sandwich structures also rebounded fully in the RTD environment, their rebound performance diminished in hygrothermal conditions due to the thermoplastic mobility of the foam cores, resulting in only weak rebound capabilities. In hygrothermal environments, the thermoplastic mobility of the foam core leads to diminished resilience after bending damage, resulting in only weak rebound capabilities. Subsequently, compressive instability tests were conducted on the wing skin foam sandwich structure. The results indicated that the basic test study effectively predicted the structural test outcomes. Structural components in the RTD environment exhibited overall flexural instability under compressive load, with damage morphology resembling a circular curve; the damaged specimens fully rebounded after unloading. Conversely, specimens in the ETW environment displayed localized instability, characterized by a wrinkled damage profile, resulting in only weak rebound capabilities after unloading. |
| format | Article |
| id | doaj-art-702b65bd997d49cf8e229013dd54a703 |
| institution | Kabale University |
| issn | 2158-3226 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj-art-702b65bd997d49cf8e229013dd54a7032025-01-02T17:23:44ZengAIP Publishing LLCAIP Advances2158-32262024-12-011412125105125105-1410.1063/5.0230348Study on flexural resilience of composite foam sandwich structures under hygrothermal environmentDi Gai0Shiyu Yang1Hai Xu2Kang Yang3Zhipeng Yao4Shengjie Yu5Yanhe Chen6Shenyang Aerospace University School of Safety Engineering, No. 37 Daoyi South Street, Shenbei New District, Shenyang City, Liaoning Province 110136, ChinaShenyang Aerospace University School of Safety Engineering, No. 37 Daoyi South Street, Shenbei New District, Shenyang City, Liaoning Province 110136, ChinaShenyang Aircraft Airworthiness Certification Center of Civil Aviation of China, Room 220, No. 3 Xiaohe Yan Road, Dadong District, Shenyang City, Liaoning Province 110043, ChinaShenyang Aerospace University Liaoning General Aviation Academy, No. 37 Daoyi South Street, Shenbei New District, Shenyang City, Liaoning Province 110136, ChinaShenyang Aerospace University School of Safety Engineering, No. 37 Daoyi South Street, Shenbei New District, Shenyang City, Liaoning Province 110136, ChinaShenyang Aerospace University School of Safety Engineering, No. 37 Daoyi South Street, Shenbei New District, Shenyang City, Liaoning Province 110136, ChinaShenyang Aircraft Airworthiness Certification Center of Civil Aviation of China, Room 220, No. 3 Xiaohe Yan Road, Dadong District, Shenyang City, Liaoning Province 110043, ChinaUnder hygrothermal environments, the structural stability and strength of all-fiber composite aircraft are significantly affected during long-term flight use. The wing skin, as a critical structural component, plays a vital role in bearing and transmitting aerodynamic loads. Therefore, it is crucial to investigate the structural compressive stability and strength of the wing skin throughout the aircraft's entire life cycle under these conditions. This study employs a real wing carbon fiber foam sandwich structure to investigate the compressive stability and strength of the wing skin structure of a new energy aircraft under actual flight conditions, specifically during the entire process of the room temperature dry state (RTD) and elevated temperature wet state (ETW). Initially, three-point bending tests were conducted on carbon fiber reinforced polymer (CFRP) laminates, foam cores, and CFRP reinforced foam sandwich structures. The CFRP laminates fully rebounded after bending damage in both the RTD and ETW environments. While CFRP reinforced foam sandwich structures also rebounded fully in the RTD environment, their rebound performance diminished in hygrothermal conditions due to the thermoplastic mobility of the foam cores, resulting in only weak rebound capabilities. In hygrothermal environments, the thermoplastic mobility of the foam core leads to diminished resilience after bending damage, resulting in only weak rebound capabilities. Subsequently, compressive instability tests were conducted on the wing skin foam sandwich structure. The results indicated that the basic test study effectively predicted the structural test outcomes. Structural components in the RTD environment exhibited overall flexural instability under compressive load, with damage morphology resembling a circular curve; the damaged specimens fully rebounded after unloading. Conversely, specimens in the ETW environment displayed localized instability, characterized by a wrinkled damage profile, resulting in only weak rebound capabilities after unloading.http://dx.doi.org/10.1063/5.0230348 |
| spellingShingle | Di Gai Shiyu Yang Hai Xu Kang Yang Zhipeng Yao Shengjie Yu Yanhe Chen Study on flexural resilience of composite foam sandwich structures under hygrothermal environment AIP Advances |
| title | Study on flexural resilience of composite foam sandwich structures under hygrothermal environment |
| title_full | Study on flexural resilience of composite foam sandwich structures under hygrothermal environment |
| title_fullStr | Study on flexural resilience of composite foam sandwich structures under hygrothermal environment |
| title_full_unstemmed | Study on flexural resilience of composite foam sandwich structures under hygrothermal environment |
| title_short | Study on flexural resilience of composite foam sandwich structures under hygrothermal environment |
| title_sort | study on flexural resilience of composite foam sandwich structures under hygrothermal environment |
| url | http://dx.doi.org/10.1063/5.0230348 |
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