13th International Conference on Fracture June 16–21, 2013, Beijing, China -4- damage of finite element model subjected to the impact energy of 14.6J. This half-specimen plot shows residual depth and interlaminar delamination occurring after impact completed. The experimental and simulated impactor reaction force-displacement and velocity histories curves corresponding to14.6J impacts on the FMLs were plotted in Figure 7(a, b). The experimental tests were not correctly replicated by the simulation results for the maximum impact force was higher, the maximum displacement was lower and impact time was shorter, while the tendency of them was reasonable the same, and the final velocities were much at one, that is the dissipated energies were almost the same. The dissipated energies against several impact energies were plotted in figure 7(c). 4. Conclusion This study presented an experimental and numerical investigation on low-velocity impact behaviors of the fibre metal laminates (FMLs). Experimental results show that the impact resistance of FMLs was higher than monolithic 2024-T3 sheets for the first crack energy about 15% higher and completely penetration energy about 34% higher. While, the impact resistance of two types of FMLs, which were cut into rectangle panels with the long edge parallel to 90 and 0 fibre separately, were almost the same. Good agreement between finite element results and experimental results such as the internal delamination and dissipated energies were obtained, and hence the model was validated. Acknowledgement This paper is sponsored by “National Natural Science Foundation of China (11002111) References [1] A.volt, Impact loading on fibre mental laminates[J]. Int. J. Impact Engng Vol. 18, No. 3, pp. 291-307, 1996. [2] A.volt, M. Krull, Impact damage resistance of various fibre mental laminates[J]. J. PHYS IV FRANCE, 7(1997) C3-1045-1050 [3] G.Caprinoa, G.Spataro, S.D.Luongo, Low-velocity impact behaviour of fibreglass–aluminium laminates[J]. Composites: Part A 35 (2004) 605–616 [4] R.C.Alaerliesten, Fatigue crack propagation and delamination growth in GLARE[D]. PhD Thesis, Delft University of Technology, Delft, 2005. [5] G. Caprino, V. Lopresto, P. Iaccarino, A simple mechanistic model to predict the macroscopic response of fibreglass–aluminium laminates under low-velocity impact[J]. Composites: Part A 38 (2007) 290–300 [6] H. Nakatani, T. Kosaka, Damage characterization of titanium/GFRP hybrid laminates subjected to low-velocity impact [J], Composites: Part A 42 (2011) 772–781. [7] J.Y.Fan, Z.W.Guan , W.J.Cantwell, Numerical modeling of perforation failure in fiber metal laminates subjected to low velocity impact loading[J]. Composite structures 93 (2011) 2430-2436 [8] M. Sadighi, R.C.Alderliesten , R.Benedictus, Impact resistance of fiber-metal laminates: A review [J]. International Journal of Impact Engineering 49 (2012) 77-90 [9] ASTM Committee, Designation: D 7136/D 7136M-2005.Standard test method for measuring the damage resistance of a fiber-reinforced polymer matrix composite to a drop-weight impact event[S].United States. [10] ABAQUS 6.10 documentation.
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