Modelling of Low Velocity Impact Damage in Laminated Composites

In this study a simple model is developed that predicts impact damage in a composite laminate avoiding the need of the time-consuming dynamic finite element method (FEM). The analytical model uses a non-linear approximation method (Rayleigh-Ritz) and the large deflection plate theory to predict the...

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Bibliographic Details
Published in:Journal of mechanical science and technology 2005-04, Vol.19 (4), p.947-957
Main Authors: Lee, Jounghwan, Kong, Changduk, Soutis, Costas
Format: Article
Language:English
Subjects:
Circular plates
Composite structures
Compressive strength
Damage
Deflection
Finite element analysis
Finite element method
Fracture mechanics
Impact damage
Impact loads
Impact strength
Laminar composites
Laminates
Layers
Mathematical analysis
Mathematical models
Plate theory
Plies
Point impact
Studies
Transverse loads
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Summary:In this study a simple model is developed that predicts impact damage in a composite laminate avoiding the need of the time-consuming dynamic finite element method (FEM). The analytical model uses a non-linear approximation method (Rayleigh-Ritz) and the large deflection plate theory to predict the number of failed plies and damage area in a quasi-isotropic composite circular plate (axisymmetric problem) due to a point impact load at its centre. It is assumed that the deformation due to a static transverse load is similar to that oc curred in a low velocity impact. It is found that the model, despite its simplicity, is in good agreement with FEM predictions and experimental data for the deflection of the composite plate and gives a good estimate of the number of failed plies due to fibre breakage. The predicted damage zone could be used with a fracture mechanics model developed by the second investigator and co-workers to calculate the compression after impact strength of such laminates. This approach could save significant running time when compared to FEM solutions.
ISSN:1738-494X
1976-3824
DOI:10.1007/BF02919177