Saeedifar, M., Fotouhi, M., Najafabadi, M. A. and Toudeshky, H. H. (2015) Interlaminar fracture toughness evaluation in glass/epoxy composites using acoustic emission and finite element methods. Journal of Materials Engineering and Performance, 24 (1). pp. 373-384. ISSN 1059-9495 Available from: http://eprints.uwe.ac.uk/33457We recommend you cite the published version. The publisher's URL is: http://dx.doi.org/10.1007/s11665-014-1291-2
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AbstractDelamination is one of the most common modes of failure in laminated composites and it leads to the loss of structural strength and stiffness. In this paper, mode I, mode II, and mixed of these pure modes were investigated using mechanical data, Finite Element Method (FEM) and Acoustic Emission (AE) signals. Experimental data were obtained from in situ monitoring of glass/epoxy laminated composites with different lay-ups when subjected to different modes of failure. The main objective was to investigate the behavior of delamination propagation and to evaluate the critical value of the
IntroductionGlass fiber reinforced plastics (GFRP) are being increasingly utilized in engineering applications due to their high specific strength and stiffness. Delamination in GFRP has been a subject of intensive research since many years. This failure mechanism can be caused by improper manufacturing, stresses between the layers of the composite, transversal load, and impact. In many real conditions, delamination occurs mainly in mode I, mode II, and the combination of these pure modes. Its effect on the structure may include a dramatic loss of residual strength and stiffness (Ref 1). Understanding the delamination initiation and propagation behavior is useful to produce structures with higher strength against crack growth (Ref 2).