Mode II interlaminar fracture tests of continuous fiber reinforced polyamide-6 composites were carried out at a quasi-static and a dynamic loading rate. Loadingrate dependence on the mode II interlaminar fracture toughness was investigated, and two different kinds of the composites, carbon fiber cloth reinforced polyamide-6 and glass fiber cloth reinforced polyamide-6, exhibited different loading-rate dependencies on the frao. ture toughness. Micromechanisms of the mode II interlaminar fracture were also studied using a scanning electron microscope. Loading-rate effects on the mode II interlaminar fracture behavior of the composites are discussed on the basis of the experimental results.
Get full access to this article
View all access options for this article.
References
1.
1. P. Davies and D. R. Moore, "Glass/Nylon-6.6 Composites: Delamination Resistance Testing,"Comp. Sci. Tech., 38, 1990, 211-227.
2.
2. M. Todo, K. Takahashi, Ph. Beguelin and H. H. Kausch, "Effect of Strain Rate on Tensile Fracture Behaviour of Fibre Reinforced Polyamide Composites,"Proc. of ICCM-11, 1997, II-405-414.
3.
3. M. Todo, T. Nakamura, T. Mada and K. Takahashi, "Measurement of Dynamic Interlaminar Fracture Toughness of FRP Laminates Using Dynamic Displacement Measuring Apparatus,"Adv. Comp. Mater., 7(3), 1998, 285-297.
4.
4. G. Aggag and K. Takahashi, "Study of Oscillation Signals in Instrumented Charpy Impact Testing,"Poly. Eng. Sci., 36(7), 2260-2266.
5.
5. T. Mada, K. Takahashi, Ph. Beguelin and G. Aggag, "Construction of a Dynamic Displacement Measurement Apparatus and Its Application to Impact Fracture Studies,"Trans. Japan Soc. Mech. Engineers, A63(611), 1997, 71-76.
6.
6. L. A. Carlsson, J. W. Gillespie, Jr. and R. B. Pipes, "On the Analysis and Design of the End Notched Flexure (ENF) Specimen for Mode II Testing,"J. Comp. Mater., 20, 1986, 594-604.
7.
7. J. G. Williams, Fracture Mechanics of Polymers, Ellis Horwood Ltd, Chichester, 1984.
8.
8. T. Kusaka, T. Kurokawa, M. Hojo and S. Ochiai, "Estimation of Interlaminar Fracture Toughness of CFRP Laminates by Measuring the Surface Strain of Specimen,"Proc. of JSMS Composites, 26, 1996, 203-204.
