elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Impressum | Kontakt | English
Schriftgröße: [-] Text [+]

A Two Scale Finite-Element-Approach to Analyse the Damage State of Composite Structures

Kreikemeier, Janko (2011) A Two Scale Finite-Element-Approach to Analyse the Damage State of Composite Structures. Dissertation. DLR-Forschungsbericht. 2011-05, 145 S.

Dieses Archiv kann nicht den gesamten Text zur Verfügung stellen.

Kurzfassung

Fibre reinforced composite materials offer a great potential for the development of lightweight structures. The exploitation of the material properties therefore demands the development of smarter and more powerful constitutive models to take into account all constitutive effects of interest. The investigation of the damage and fracture behaviour of composite materials is of scientific interest for more than 120 years. But until today there exists no theory which captures all of the significant features of composite materials at multi axial loading conditions in a sufficient way. In fact, there exists a number of theories applicable for several special loading conditions. In this work a two scale finite element model is developed to describe and analyse the anisotropic damage state of fibre reinforced composite materials. The thermodynamically consistent formulation is based on the standard continuum mechanics framework of finite deformations. The damage onset is measured by means of the maximum principal stress criterion of the true Cauchy stress tensor. The corresponding eigendirection is used as the crack propagation direction. The coupling of the macro scale and the micro scale is carried out by means of the UMAT utility of the commercial finite element system Abaqus. A shell with a concentric hole is used to verify the two scale approach and to show the mesh independence of the finite element solution. Afterwards a class of newly developed crimped end fittings is analysed to show the applicability of the two scale approach on complex models, too.

Dokumentart:Berichtsreihe (DLR-Forschungsbericht, Dissertation)
Titel:A Two Scale Finite-Element-Approach to Analyse the Damage State of Composite Structures
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Kreikemeier, JankoNICHT SPEZIFIZIERT
Datum:Mai 2011
Seitenanzahl:145
ISSN:1434-8485
Stichwörter:A Two Scale Finite-Element-Approach to Analyse the Damage State of Composite Structures
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 - Simulation & Validierung
Standort: Braunschweig
Institute & Einrichtungen:Institut für Faserverbundleichtbau und Adaptronik > Strukturmechanik
Hinterlegt von: Isolde Böhringer-Thelen
Hinterlegt am:23 Nov 2011 09:27
Letzte Änderung:23 Nov 2011 09:32

Nur für Mitarbeiter des Archivs: Kontrollseite des Eintrags

Blättern
Suchen
Hilfe & Kontakt
Informationen
electronic library verwendet EPrints 3.3.12
Copyright © 2008-2013 Deutsches Zentrum für Luft- und Raumfahrt (DLR). Alle Rechte vorbehalten.