Browsing by Author "Morais, A. B. de"
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- Mode III interlaminar fracture of carbon/epoxy laminates using the edge crack torsion (ECT) testPublication . Morais, A. B. de; Pereira, A. B.; Moura, M. F. S. F. de; Magalhães, A. G.The mode III interlaminar fracture of carbon/epoxy laminates was evaluated with the edge crack torsion (ECT) test. Three-dimensional finite element analyses were performed in order to select two specimen geometries and an experimental data reduction scheme. Test results showed considerable non-linearity before the maximum load point and a significant R-curve effect. These features prevented an accurate definition of the initiation point. Nevertheless, analyses of non-linearity zones showed two likely initiation points corresponding to GIIIc values between 850 and 1100 J/m2 for both specimen geometries. Although any of these values is realistic, the range is too broad, thus showing the limitations of the ECT test and the need for further research.