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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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.
|Title:||Computational methods for predicting impact damage in composite structures|
|Journal or Publication Title:||Composites Science and Technology|
|In ISI Web of Science:||Yes|
|Page Range:||pp. 2183-2192|
|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|
|Institutes and Institutions:||Institute of Structures and Design|
|Deposited By:||elib DLR-Beauftragter|
|Deposited On:||16 Sep 2005|
|Last Modified:||14 Jan 2010 21:25|
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