A Study on Thermal Buckling and Mode Jumping of Metallic and Composite Plates
Composite plates in post-buckling regime can experience mode jumping in their buckling shape, suddenly increasing the number of half-waves. This phenomenon can be advantageous, because the shape change could be used for local morphing or structural adaptability in future aerospace structures. A stud...
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| Format: | Article |
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MDPI AG
2021-02-01
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| Series: | Aerospace |
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| Online Access: | https://www.mdpi.com/2226-4310/8/2/56 |
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| author | Javier Gutiérrez Álvarez Chiara Bisagni |
| author_facet | Javier Gutiérrez Álvarez Chiara Bisagni |
| author_sort | Javier Gutiérrez Álvarez |
| collection | DOAJ |
| description | Composite plates in post-buckling regime can experience mode jumping in their buckling shape, suddenly increasing the number of half-waves. This phenomenon can be advantageous, because the shape change could be used for local morphing or structural adaptability in future aerospace structures. A study of this phenomenon under heating is here presented, combining numerical and experimental techniques. At first, a set of parametric analysis was conducted to identify composite panels that present a mode jump when heated. Three plates were selected, one in aluminum alloy <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>2024</mn><mi mathvariant="normal">T</mi><mn>3</mn></mrow></semantics></math></inline-formula>, and two in <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>AS</mi><mn>4</mn><mo>/</mo><mn>8552</mn></mrow></semantics></math></inline-formula> composite material, with layup <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mrow><mrow><mo>[</mo><mrow><mn>30</mn><mo>/</mo><mo>−</mo><mn>30</mn><mo>/</mo><mn>5</mn><mo>/</mo><mo>−</mo><mn>5</mn></mrow><mo>]</mo></mrow></mrow><mi>s</mi></msub></mrow></semantics></math></inline-formula> and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mrow><mrow><mo>[</mo><mrow><mn>35</mn><mo>/</mo><mo>−</mo><mn>35</mn><mo>/</mo><mn>10</mn><mo>/</mo><mo>−</mo><mn>10</mn></mrow><mo>]</mo></mrow></mrow><mi>s</mi></msub></mrow></semantics></math></inline-formula>. The plates were tested in a new test setup for thermal buckling based on low thermal expansion fixtures. The mode jumping was successfully obtained experimentally for both composite plates. Numerical simulations predicted the general trends for all plates, and the mode jumps for the composite plates. |
| first_indexed | 2024-03-09T00:39:54Z |
| format | Article |
| id | doaj.art-cc263b70eee444e2a32b5e85ca8cf9aa |
| institution | Directory Open Access Journal |
| issn | 2226-4310 |
| language | English |
| last_indexed | 2024-03-09T00:39:54Z |
| publishDate | 2021-02-01 |
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| spelling | doaj.art-cc263b70eee444e2a32b5e85ca8cf9aa2023-12-11T17:53:39ZengMDPI AGAerospace2226-43102021-02-01825610.3390/aerospace8020056A Study on Thermal Buckling and Mode Jumping of Metallic and Composite PlatesJavier Gutiérrez Álvarez0Chiara Bisagni1Faculty of Aerospace Engineering, Delft University of Technology, 2629 HS Delft, The NetherlandsFaculty of Aerospace Engineering, Delft University of Technology, 2629 HS Delft, The NetherlandsComposite plates in post-buckling regime can experience mode jumping in their buckling shape, suddenly increasing the number of half-waves. This phenomenon can be advantageous, because the shape change could be used for local morphing or structural adaptability in future aerospace structures. A study of this phenomenon under heating is here presented, combining numerical and experimental techniques. At first, a set of parametric analysis was conducted to identify composite panels that present a mode jump when heated. Three plates were selected, one in aluminum alloy <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>2024</mn><mi mathvariant="normal">T</mi><mn>3</mn></mrow></semantics></math></inline-formula>, and two in <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>AS</mi><mn>4</mn><mo>/</mo><mn>8552</mn></mrow></semantics></math></inline-formula> composite material, with layup <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mrow><mrow><mo>[</mo><mrow><mn>30</mn><mo>/</mo><mo>−</mo><mn>30</mn><mo>/</mo><mn>5</mn><mo>/</mo><mo>−</mo><mn>5</mn></mrow><mo>]</mo></mrow></mrow><mi>s</mi></msub></mrow></semantics></math></inline-formula> and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mrow><mrow><mo>[</mo><mrow><mn>35</mn><mo>/</mo><mo>−</mo><mn>35</mn><mo>/</mo><mn>10</mn><mo>/</mo><mo>−</mo><mn>10</mn></mrow><mo>]</mo></mrow></mrow><mi>s</mi></msub></mrow></semantics></math></inline-formula>. The plates were tested in a new test setup for thermal buckling based on low thermal expansion fixtures. The mode jumping was successfully obtained experimentally for both composite plates. Numerical simulations predicted the general trends for all plates, and the mode jumps for the composite plates.https://www.mdpi.com/2226-4310/8/2/56post-bucklingthermal testingInstabilityexperimental bucklingshape changeaeronautical morphing application |
| spellingShingle | Javier Gutiérrez Álvarez Chiara Bisagni A Study on Thermal Buckling and Mode Jumping of Metallic and Composite Plates Aerospace post-buckling thermal testing Instability experimental buckling shape change aeronautical morphing application |
| title | A Study on Thermal Buckling and Mode Jumping of Metallic and Composite Plates |
| title_full | A Study on Thermal Buckling and Mode Jumping of Metallic and Composite Plates |
| title_fullStr | A Study on Thermal Buckling and Mode Jumping of Metallic and Composite Plates |
| title_full_unstemmed | A Study on Thermal Buckling and Mode Jumping of Metallic and Composite Plates |
| title_short | A Study on Thermal Buckling and Mode Jumping of Metallic and Composite Plates |
| title_sort | study on thermal buckling and mode jumping of metallic and composite plates |
| topic | post-buckling thermal testing Instability experimental buckling shape change aeronautical morphing application |
| url | https://www.mdpi.com/2226-4310/8/2/56 |
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