Numerical Prediction of Impact Damage in Composite Structures
Johnson, A. (2001) Numerical Prediction of Impact Damage in Composite Structures. Workshop on "Structural Integrity of Composite Materials and Structures", Capri, Italien, 20-25 Mai 2001.
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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. 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:||Conference or Workshop Item (Paper)|
|Title:||Numerical Prediction of Impact Damage in Composite Structures|
|Keywords:||damage mechanics, numerical simulation, FE analysis, composites, aircraft|
|Event Title:||Workshop on "Structural Integrity of Composite Materials and Structures", Capri, Italien, 20-25 Mai 2001|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Aeronautics|
|HGF - Program Themes:||L - no assignement|
|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 22:25|
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