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Metamodeling methodology for postbuckling simulation of Damaged composite stiffened structures with physical validation

Kalnins, Kaspars und Rikards, Rolands und Auzins, Janis und Bisagni, Chiara und Abramovich, Haim und Degenhardt, Richard (2010) Metamodeling methodology for postbuckling simulation of Damaged composite stiffened structures with physical validation. International Journal of Structural Stability and Dynammics, 10 (4), Seiten 705-717. Imperial College Press. ISSN 0219-4554.

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Kurzfassung

A metamodeling methodology has been proposed for postbuckling simulation of stiffened composite structures with integrated degradation scenarios. The presence of artificial damage in between the outer skin and stiffeners has been simulated as softening of the material properties in predetermined regions in the structure. The proposed methodology for the fast design procedure of axially or torsionally loaded stiffened composite structures is based on response surface methodology (RSM) and design and analysis of computer experiments (DACE). Numerical analyses have been parametrically sampled by means of ANSYS/LS-DYNA probabilistic design toolbox extracting the load-shortening response curves in the preselected domain of interest. These response curves have been simplified using piece-wise linear approximation identifying the buckling and postbuckling stiffness ratios along with the values of the skin and the stiffener buckling loads. Three stiffened panel designs and a closed box structure with preselected damage scenarios have been elaborated and validated with the tests performed within the COCOMAT project. The resulting design procedure provides a time effective design tool for preliminary study and for elaboration of the optimum design guidelines of composite stiffened structures with material degradation restraints.

Dokumentart:Zeitschriftenbeitrag
Titel:Metamodeling methodology for postbuckling simulation of Damaged composite stiffened structures with physical validation
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Kalnins, KasparsInstitute of Materials and Structures, Riga Technical University, Latvia
Rikards, RolandsInstitute of Materials and Structures, Riga Technical University, Latvia
Auzins, JanisInstitute of Materials and Structures, Riga Technical University, Latvia
Bisagni, ChiaraDepartment of Aerospace Engineering, Politecnico di Milano, Italy
Abramovich, HaimFaculty of Aerospace Engineering, Technion, I.I.T., Haifa, Israel
Degenhardt, RichardNICHT 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 705-717
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:Metamodeling; postbuckling; stiffened structures; physical validation; structural degradation; design of computer experiments; fast design procedure
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 11:35
Letzte Änderung:07 Feb 2013 19:42

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