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Computational methods for predicting impact damage in composite structures

Johnson, A. and Pickett, A. and Rozycki, P. (2001) Computational methods for predicting impact damage in composite structures. Composites Science and Technology, 61, pp. 2183-2192.

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Abstract

This paper describes recent progress on materials modelling and numerical simulation of the impact response of fibre reinforced composite structures. A continuum damage mechanics model for fabric reinforced composites is developed as a framework within which both in-ply and delamination failure may be modelled during impact loading. Damage evolution equations are derived and appropriate materials parameters determined from experiments. The model for in-plane failure has been implemented in a commercial explicit finite element code, and new techniques are used to model the laminate as a stack of shell elements tied via contact interface conditions. This approach allows the interlaminar layers to be modelled and strength reduction due to delamination to be presented; it also provides a computationally efficient method for the analysis of large-scale structural parts. The code is applied to predict the response of carbin fabric reinforced epoxy plates impacted at different velocities by a steel impactor. A comparison of structural response and failure modes from numerical simulations and impact tests is given which shows a good agreement for the prediction of delamination damage at low impact energies and fracture and penetration at higher impact energies.

Document Type:Article
Additional Information: LIDO-Berichtsjahr=2002,
Title:Computational methods for predicting impact damage in composite structures
Authors:
AuthorsInstitution or Email of Authors
Johnson, A.UNSPECIFIED
Pickett, A.ESI GmbH
Rozycki, P.LAMIH, Université Valenciennes, Frankreich
Date:2001
Journal or Publication Title:Composites Science and Technology
Refereed publication:Yes
In ISI Web of Science:Yes
Volume:61
Page Range:pp. 2183-2192
Status:Published
Keywords:polymer matrix composites, PMC, impact behaviour, computational simulation, damage mechanics, delamination
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L ST - Starrflüglertechnologien
DLR - Research theme (Project):UNSPECIFIED
Location: Stuttgart
Institutes and Institutions:Institute of Structures and Design
Deposited By: elib DLR-Beauftragter
Deposited On:16 Sep 2005
Last Modified:14 Jan 2010 22:25

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