Strength tests of repair joints loaded with tension and loss of stability
During aircraft service, the skin is the component that first comes into contact with factors that can cause mechanical damage -that is why it is most often damaged during use. Semi-monocoque aircraft structures are made of a skin and a frame. The skin is an element that significantly affects the s...
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Sieć Badawcza Łukasiewicz - Warszawski Instytut Technologiczny
2024-12-01
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| Series: | Technologia i Automatyzacja Montażu |
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| Online Access: | https://journals.prz.edu.pl/tiam/article/view/1760/1378 |
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| author | Iga BARCA Jan GODZIMIRSKI1 Marek ROŚKOWICZ |
| author_facet | Iga BARCA Jan GODZIMIRSKI1 Marek ROŚKOWICZ |
| author_sort | Iga BARCA |
| collection | DOAJ |
| description | During aircraft service, the skin is the component that first comes into contact with factors that can cause mechanical damage -that is why it is most often damaged during use. Semi-monocoque aircraft structures are made of a skin and a frame. The skin is an element that significantly affects the safety of the structure, since it transfers loads between the elements of the frame. For this reason, the skin is subject to special supervision during technical maintenance, and any damage detected must be repaired. The research was carried out on specimens made of AW 2024-T3 plate sheet with a thickness of 1 mm. In the study, a comparative analysis of damaged, undamaged and repaired specimens loaded in tension and compression was performed. Different patches were used in repaired specimens, made of metallic as well as composite materials, connected to the structure with rivets or using adhesive materials. The study showed that the use of riveted as well as adhesively bonded overlays does not allow the original strength of the tensile-loaded skin to be restored, but does allow the strength of the compression-loaded skin to be restored. In addition, numerical simulations were performed to define the stress field occurring in the adhesive joint for different geometric dimensions of the plate. The results of the numerical analysis showed that the geometry of the plate model influences the values of reduced stresses in the adhesive weld and the patch. Regardless ofthe analyzed changes in the geometry of the plate model, the maximum values of reduced stresses are similar to each other. The smallest values of reduced stresses in the adhesive joint and composite patch were obtained for the case of a plate with a thickness of 1 mm and a width of 160 mm. |
| format | Article |
| id | doaj-art-730bae949c634f039b085a128eb86f2d |
| institution | OA Journals |
| issn | 2450-8217 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Sieć Badawcza Łukasiewicz - Warszawski Instytut Technologiczny |
| record_format | Article |
| series | Technologia i Automatyzacja Montażu |
| spelling | doaj-art-730bae949c634f039b085a128eb86f2d2025-08-20T01:49:23ZengSieć Badawcza Łukasiewicz - Warszawski Instytut TechnologicznyTechnologia i Automatyzacja Montażu2450-82172024-12-01126431310.7862/tiam.2024.4.1Strength tests of repair joints loaded with tension and loss of stabilityIga BARCA0https://orcid.org/0000-0003-4687-4873Jan GODZIMIRSKI11https://orcid.org/0000-0003-1593-2057Marek ROŚKOWICZ2https://orcid.org/0000-0003-0501-0622Faculty of Mechatronics, Armament and Aerospace, Military University of Technology, Sylwester Kaliski Street 2, Warsaw, Poland Faculty of Mechatronics, Armament and Aerospace, Military University of Technology, Sylwester Kaliski Street 2, Warsaw, Poland Faculty of Mechatronics, Armament and Aerospace, Military University of Technology, Sylwester Kaliski Street 2, Warsaw, Poland During aircraft service, the skin is the component that first comes into contact with factors that can cause mechanical damage -that is why it is most often damaged during use. Semi-monocoque aircraft structures are made of a skin and a frame. The skin is an element that significantly affects the safety of the structure, since it transfers loads between the elements of the frame. For this reason, the skin is subject to special supervision during technical maintenance, and any damage detected must be repaired. The research was carried out on specimens made of AW 2024-T3 plate sheet with a thickness of 1 mm. In the study, a comparative analysis of damaged, undamaged and repaired specimens loaded in tension and compression was performed. Different patches were used in repaired specimens, made of metallic as well as composite materials, connected to the structure with rivets or using adhesive materials. The study showed that the use of riveted as well as adhesively bonded overlays does not allow the original strength of the tensile-loaded skin to be restored, but does allow the strength of the compression-loaded skin to be restored. In addition, numerical simulations were performed to define the stress field occurring in the adhesive joint for different geometric dimensions of the plate. The results of the numerical analysis showed that the geometry of the plate model influences the values of reduced stresses in the adhesive weld and the patch. Regardless ofthe analyzed changes in the geometry of the plate model, the maximum values of reduced stresses are similar to each other. The smallest values of reduced stresses in the adhesive joint and composite patch were obtained for the case of a plate with a thickness of 1 mm and a width of 160 mm.https://journals.prz.edu.pl/tiam/article/view/1760/1378repair nodesemi-monocoque structurecomposite materialsnumerical calculations |
| spellingShingle | Iga BARCA Jan GODZIMIRSKI1 Marek ROŚKOWICZ Strength tests of repair joints loaded with tension and loss of stability Technologia i Automatyzacja Montażu repair node semi-monocoque structure composite materials numerical calculations |
| title | Strength tests of repair joints loaded with tension and loss of stability |
| title_full | Strength tests of repair joints loaded with tension and loss of stability |
| title_fullStr | Strength tests of repair joints loaded with tension and loss of stability |
| title_full_unstemmed | Strength tests of repair joints loaded with tension and loss of stability |
| title_short | Strength tests of repair joints loaded with tension and loss of stability |
| title_sort | strength tests of repair joints loaded with tension and loss of stability |
| topic | repair node semi-monocoque structure composite materials numerical calculations |
| url | https://journals.prz.edu.pl/tiam/article/view/1760/1378 |
| work_keys_str_mv | AT igabarca strengthtestsofrepairjointsloadedwithtensionandlossofstability AT jangodzimirski1 strengthtestsofrepairjointsloadedwithtensionandlossofstability AT marekroskowicz strengthtestsofrepairjointsloadedwithtensionandlossofstability |