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Cyclic buckling tests of pre-damaged CFRP stringer stiffened panels

Wilckens, Dirk und Degenhardt, Richard und Rohwer, Klaus und Zimmermann, Rolf und Kepke, Markus und Hildebrandt, Bernd und Zipfel, Ary (2010) Cyclic buckling tests of pre-damaged CFRP stringer stiffened panels. International Journal of Structural Stability and Dynammics, 10 (4), Seiten 827-853. Imperial College Press. ISSN 0219-4554.

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Kurzfassung

Experimental results obtained from cyclic buckling and post buckling tests of pre-damaged stiffened CFRP panels are described in this paper. This work was conducted within the COCOMAT project funded by the EU with the objective to contribute to the reduction of structural weight at safe design. COCOMAT targeted to establish a new design scenario for composite stiffened panels which are understood as part of an aircraft fuselage. This design scenario aimed at exploiting considerable reserve carrying capacities in fibre composite fuselage structures by accurate simulation of collapse. The project results cover an experimental data base, improved slow and fast computational tools as well as design guidelines. A reliable simulation of the collapse load requires taking degradation into account. For the validation of the tools, a sound database of experiments is needed which give information about the progress of damage during the loading process. In this context, the present paper focuses on the investigation on pre-damaged stringer stiffened panels under cyclic axial compression. A set of four panels of the same design was split in two variants which only differ in the position of an artificial Teflon disbond beneath a stringer. One of each variant has been tested statically until collapse in one step as reference while the remaining panel was tested cyclically with different amplitudes. Before the test, all test structures were assessed by ultrasonic inspection and the geometric imperfections were measured. During the test, advanced measurement systems such as the ARAMIS system for the measurement of the buckling pattern and thermography for monitoring the skin-stringer separation are utilized in addition to strain gauge measurements and the record of the load shortening data. The test structures, their preparations for testing, the buckling test facility, and the measurement systems used are described. The test results as to the influence of the cyclic loading on the damage progression in the skin-stringer connection are presented and discussed.

Dokumentart:Zeitschriftenbeitrag
Titel:Cyclic buckling tests of pre-damaged CFRP stringer stiffened panels
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Wilckens, DirkNICHT SPEZIFIZIERT
Degenhardt, RichardNICHT SPEZIFIZIERT
Rohwer, KlausNICHT SPEZIFIZIERT
Zimmermann, RolfNICHT SPEZIFIZIERT
Kepke, MarkusNICHT SPEZIFIZIERT
Hildebrandt, BerndNICHT SPEZIFIZIERT
Zipfel, AryNICHT SPEZIFIZIERT
Datum:Oktober 2010
Erschienen in:International Journal of Structural Stability and Dynammics
Referierte Publikation:Ja
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:10
Seitenbereich:Seiten 827-853
Herausgeber:
HerausgeberInstitution und/oder E-Mail-Adresse der Herausgeber
Yang, Y.B.National Tauwan University
Wang, C.M.National University of Singapore
Reddy, J.N.Texas A&M University
Degenhardt, RichardDLR, Guest Editor
Verlag:Imperial College Press
Name der Reihe:International Journal of Structural Stability and Dynamics
ISSN:0219-4554
Status:veröffentlicht
Stichwörter:stability, tests, composite structures, buckling, post buckling, collapse, skin-stringer separation, degradation, cyclic loading, pre-damage
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Starrflügler
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L AR - Starrflüglerforschung
DLR - Teilgebiet (Projekt, Vorhaben):L - Strukturen & Werkstoffe
Standort: Braunschweig
Institute & Einrichtungen:Institut für Faserverbundleichtbau und Adaptronik > Strukturmechanik
Hinterlegt von: Doris Ries
Hinterlegt am:01 Sep 2010 11:26
Letzte Änderung:07 Feb 2013 19:42

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