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electronic library – An experimental damage tolerance investigation of CFRP composites on a substructural level


Bogenfeld, Raffael Marius und Gorsky, Christopher und Wille, Tobias

(2022)

An experimental damage tolerance investigation of CFRP composites on a substructural level.

Composites Part C: Open Access (8), Seite 100267.

Elsevier.
doi: 10.1016/j.jcomc.2022.100267.

ISSN 2666-6820.

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Offizielle URL: https://www.sciencedirect.com/science/article/pii/S2666682022000330?via%3Dihub

Kurzfassung

The damage tolerance (DT) allowables for the design of a composite structure are typically determined through experiments on the coupon level. The present study examines the transferability of the DT behavior from the coupon level to a structural level. For that purpose, a DT critical panel with two stiffeners was designed and tested. In one quasi-static and two cyclic compression after impact tests, the damage evolution behavior was studied and compared with results achieved on the coupon level. Similar phenomena were found on both scales: a long interval of load cycles, without any detectable damage evolution is succeeded by the sudden propagation of the delamination and the fiber fracture. Afterward, the ultimate failure occurs within few load cycles. Even though the stiffened panel offers a significant possibility to transfer load from the damaged skin, a significant damage stabilization could not be achieved. The no-growth interval was found to be shorter on the structural scale, however, an analytical DT analysis suggests the different damage size as the most likely cause. However, it was found that the stiffeners slow down the damage propagation. Eventually, the study confirms the no-growth design approach as the preferred method to account for the DT of stiffened, compression-loaded composite structures.

elib-URL des Eintrags: https://elib.dlr.de/186345/
Dokumentart: Zeitschriftenbeitrag
Titel: An experimental damage tolerance investigation of CFRP composites on a substructural level
Autoren:
Datum: August 2022
Erschienen in: Composites Part C: Open Access
Referierte Publikation: Ja
Open Access: Ja
Gold Open Access: Ja
In SCOPUS: Ja
In ISI Web of Science: Nein
DOI
:
10.1016/j.jcomc.2022.100267
Seitenbereich: Seite 100267
Herausgeber:
Herausgeber Institution und/oder E-Mail-Adresse der Herausgeber Herausgeber-ORCID-iD
Ferreira, Antonio University of Porto NICHT SPEZIFIZIERT
Verlag: Elsevier
ISSN: 2666-6820
Status: veröffentlicht
Stichwörter: Damage tolerance
Fatigue
Delamination
Damage growth
Structural test
Aircraft design
HGF – Forschungsbereich: Luftfahrt, Raumfahrt und Verkehr
HGF – Programm: Luftfahrt
HGF – Programmthema: Umweltschonender Antrieb
DLR – Schwerpunkt: Luftfahrt
DLR – Forschungsgebiet: L CP – Umweltschonender Antrieb
DLR – Teilgebiet (Projekt, Vorhaben): L – Werkstoffe und Herstellverfahren, L – Strukturwerkstoffe und Bauweisen
Standort: Braunschweig
Institute & Einrichtungen: Institut für Faserverbundleichtbau und Adaptronik > Strukturmechanik
Hinterlegt von:

Bogenfeld, Raffael Marius

Hinterlegt am: 16 Mai 2022 08:50
Letzte Änderung: 16 Mai 2022 08:50

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