da Cunha, Fabio und Wille, Tobias und Degenhardt, Richard und Sinapius, Michael und Araujo, Francisco Celio (2013) Robustness Assessment of Stiffened Thin-Walled Composite Structures in Post-Buckling. 17th International Conference on Composite Structures (ICCS17), 2013-06-17 - 2013-06-21, Porto, Portugal.
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Kurzfassung
This work presents the robustness assessment of stiffened thin-walled composite structures in post-buckling, which is based on a new design strategy that satisfies weight, load-based performance and energy-based robustness requirements. In this approach, robustness is understood as collapse insensitivity due a local failure, where global buckling for instance is assumed as a local failure, once the stiffness reduction after this event can lead to a sharp collapse. Following this concept, robustness measures are derived from the structural energy, the area under the load-shortening curve obtained from geometrical nonlinear finite element analysis with material progressive failure. Since inherent uncertainties in geometry, material properties, ply orientation and thickness affect the structural performance and robustness, those variations are accounted for. As a result, a new argument is given to shift collapse closer to ultimate load, so that lighter structures are achievable with both performance and robustness requirements satisfied. This trade-off is valuable to aerospace applications, where light weight and safety are mandatory. Finally, this innovative strategy is demonstrated for stiffened thin-walled composite structures in post-buckling, and its results compared to others obtained from current practice.
elib-URL des Eintrags: | https://elib.dlr.de/83854/ | ||||||||||||||||||||||||
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Dokumentart: | Konferenzbeitrag (Vortrag) | ||||||||||||||||||||||||
Titel: | Robustness Assessment of Stiffened Thin-Walled Composite Structures in Post-Buckling | ||||||||||||||||||||||||
Autoren: |
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Datum: | 2013 | ||||||||||||||||||||||||
Referierte Publikation: | Nein | ||||||||||||||||||||||||
Open Access: | Ja | ||||||||||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||||||||||
In SCOPUS: | Nein | ||||||||||||||||||||||||
In ISI Web of Science: | Nein | ||||||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||||||
Stichwörter: | robustness, stiffened thin-walled composite structures, post-buckling | ||||||||||||||||||||||||
Veranstaltungstitel: | 17th International Conference on Composite Structures (ICCS17) | ||||||||||||||||||||||||
Veranstaltungsort: | Porto, Portugal | ||||||||||||||||||||||||
Veranstaltungsart: | internationale Konferenz | ||||||||||||||||||||||||
Veranstaltungsbeginn: | 17 Juni 2013 | ||||||||||||||||||||||||
Veranstaltungsende: | 21 Juni 2013 | ||||||||||||||||||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||||||||||||||
HGF - Programm: | Raumfahrt | ||||||||||||||||||||||||
HGF - Programmthema: | Raumtransport | ||||||||||||||||||||||||
DLR - Schwerpunkt: | Raumfahrt | ||||||||||||||||||||||||
DLR - Forschungsgebiet: | R RP - Raumtransport | ||||||||||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | R - Raumfahrzeugsysteme - Numerische Verfahren und Simulation (alt) | ||||||||||||||||||||||||
Standort: | Braunschweig | ||||||||||||||||||||||||
Institute & Einrichtungen: | Institut für Faserverbundleichtbau und Adaptronik > Strukturmechanik | ||||||||||||||||||||||||
Hinterlegt von: | Degenhardt, Prof. Dr. Richard | ||||||||||||||||||||||||
Hinterlegt am: | 18 Sep 2013 14:28 | ||||||||||||||||||||||||
Letzte Änderung: | 24 Apr 2024 19:50 |
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