Growth of Longitudinal Matrix Damage in Unidirectional Composites
An analytical model is developed to predict fracture behavior of unidirectional composite laminates with a transverse crack and longitudinal matrix damage. Consistent shear-lag theory is used in the stress-displacement expressions. The resulting system of differential equations is solved using an eigenvalue technique. Two types of composite elements are used in the model; homogeneous elements with smeared laminate properties and heterogeneous elements of constituent fiber and matrix properties. Model predictions for longitudinal split initiation and split growth are obtained to correlate with the available experimental data gathered from test specimens with simulated transverse cracks. Results show that the consistent shear-lag model accurately predicts split initiation. The model also predicts two regions of split growth. The first region is characterized by slow split growth due to a tension failure mode. The second region is attributed to a shear failure mode resulting in rapid split growth. © 1991.
L. R. Dharani and R. L. Recker, "Growth of Longitudinal Matrix Damage in Unidirectional Composites," Engineering Fracture Mechanics, Elsevier, Jan 1991.
The definitive version is available at http://dx.doi.org/10.1016/0013-7944(91)90081-B
Mechanical and Aerospace Engineering
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