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Determination of delamination damage in composites under impact loads

Johnson, Alastair F. und Toso-Pentecôte, Nathalie (2008) Determination of delamination damage in composites under impact loads. In: Delamination behaviour of composites Woodhead Publishing and Maney Publishing. . ISBN 978-1-84569-244-5.

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Kurzfassung

This contribution describes recent progress on materials modelling and numerical simulation of fibre reinforced composite shell structures subjected to high velocity impact loads. A Continuum Damage Mechanics (CDM) model for fibre reinforced composites is applied to model both in-ply damage and delamination failure during impact loading. The CDM model has been implemented in a commercial explicit finite element (FE) code in which a laminate is modelled by stacked shell elements with cohesive interfaces which fracture when a delamination failure energy criterion is reached. A comparison of structural response and failure modes from numerical simulations is then conducted. In particular, emphasis is put on the influence of delamination damage on the impact behaviour of composite plates and stiffened panels. Delamination damage is measured in low velocity drop tower impact tests and also in high velocity gas gun tests on composite plates with steel projectiles carried out at the DLR. In both types of test it is seen that at lower impact energies delamination damage was often the main damage mechanism, whereas at higher impact energies there was fibre fracture and plate penetration by the hard projectiles. In this case, the presence of some delamination provides an additional energy absorption mechanism in the composite plate, which can reduce complete penetration. It follows that modelling and analysis of impact damage require composites failure models which include both in-plane ply damage and delamination damage.

Dokumentart:Beitrag im Sammelband
Titel:Determination of delamination damage in composites under impact loads
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Johnson, Alastair F.NICHT SPEZIFIZIERT
Toso-Pentecôte, NathalieNICHT SPEZIFIZIERT
Datum:2008
Erschienen in:Delamination behaviour of composites
Referierte Publikation:Ja
In ISI Web of Science:Nein
Seitenbereich:
Herausgeber:
HerausgeberInstitution und/oder E-Mail-Adresse der Herausgeber
Sridharan, SrinivasanNICHT SPEZIFIZIERT
Verlag:Woodhead Publishing and Maney Publishing
ISBN:978-1-84569-244-5
Status:veröffentlicht
Stichwörter:delamination, impact, composite modelling
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Luftfahrt
HGF - Programmthema:Drehflügler
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L RR - Drehflüglerforschung
DLR - Teilgebiet (Projekt, Vorhaben):L - Der robuste Drehflügler
Standort: Stuttgart
Institute & Einrichtungen:Institut für Bauweisen- und Konstruktionsforschung > Strukturelle Integrität
Hinterlegt von: Nathalie Toso
Hinterlegt am:14 Jan 2009
Letzte Änderung:27 Apr 2009 15:35

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