Damage Behavior of Foam Core Sandwich Composites Subjected to Quasi-Static Indentation Testing

Abstract:

Damage behavior of foam core sandwich composites subjected to quasi-static indentation testing was investigated detailedly. Force-displacement curves and the cross-sections of damaged sandwich panels were analyzed. Effects of core thickness, face-sheet thickness and toughness of face-sheet materials were discussed by comparison with different specimens subjected to quasi-static indentation testing. Results showed that damage behavior of sandwich composites had identical feature. Collapse of foam core initially appeared, and then foam core generated crack. Delamination and fiber breakage of upper face-sheet occurred. Finally, the foam core and the face-sheet were disengaged. For the specimens with thick foam cores, the foam crack extended in longitudinal direction was caused. However, for the specimens with thin foam cores, the foam cracked in transverse direction. After face-sheets were toughened with PAEK, the damage resistance and the maximum force of the sandwich panels increased. Also, the shear angle of foam crack changed to be lager. Compared with the penetrated damage behavior of sandwich panels with thin face-sheets, the upper face-sheets of the former the specimens with thick face-sheets bulged partially and could not be penetrated.

• Periodical: Applied Mechanics and Materials (Volumes 182-183)
• Pages: 57-64
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.182-183.57
• Online since: June 2012
• Authors: Li Yan, Xue Feng An, Jian Li Cai, Xiao Su Yi
• Keywords: Damage Behavior, Foam Core Sandwich Composites, Force-Displacement Curves, Quasi-Static Indentation Testing

References

[1] J.R. Vinson: Sandwich structures. Appl. Mech. Rev., 2001, 54(3), 201-214.

[2] A. Shipsha. J Sandwich Struct Mater, 2003, 5(1), 7-32.

[3] D. Zenkert: An introduction to sandwich construction. London: Chameleon Press Ltd, (1995).

[4] S. Abrate: Impact on composite structures. Cambridge: Cambridge University Press, (1998).

[5] M.L. Bernard, P.A. Lagace. Impact resistance of composite plates. Proceedings of the American Society for Composites, Second Technical Conference, 1987. pp.167-176.

[6] M. Akay, R. Hanna. Composites, 1990, 21: 325-331.

[7] R. Olsson. J Sandwich Struct Mater 2002, 4(January).

[8] R. Olsson. Methodology for predicting the residual strength of impacted sandwich panels. FFA TN 1999-08, The Aeronautical Research Institute of Sweden, (1999).

[9] H.M. Wen, T.Y. Reddy, S.R. Reid, et al. Key Eng Mater 1998, 141-143: 501-52.

[10] M.S. Hoo Fatt, K.S. Park. Compos Struct 2001, 52: 335-51.

[11] M.S. Hoo Fatt, K.S. Park. Compos Struct 2001, 52: 353-64.

[12] P.D. Soden. J Strain Anal 1996, 31(5): 353-60.

[13] F.M. Shuaeib, P.D. Compos Sci Technol 1997, 57: 1249-59.

[14] O. Riniard. Examination of indentation damage in sandwich panels. Master Thesis FFATN 1995-36. The Aeronautical Research Institute of Sweden, (1999).

[15] R. Ferri, B.V. Sankar. Proc ASME Aerospace Div, 1997, 55: 485-490.

[16] X.F. An, B. M Tang, X.S. Yi, et al. J Mater Sci Lett 2002, 21(22): 1763-1765.

[17] X.S. Yi, X.F. An, B. M Tang, et al. Adv Eng Mater 2003, 5(10): 729-732.

[18] W. Long, Y.H. Xu, X.S. Yi, et al. J Mater Sci 2004, 39(6): 2263-2266.

[19] X.S. Yi, X.F. An. J Mater Sci 2004, 39(9): 3253-3255.

[20] Q.F. Cheng, Z.P. Fang, Y.H. Xu, et al. High Perform Polym. 2006, 18(6): 907-917.

[21] X.G. Li, L. Xiong, X.S. Yi, et al. J Mater Sci. 2005, 40(18): 5067-5070.

[22] ASTM D 7136-05, Test method for measuring the damage resistance ofa fiber-reinforced polymer-matrix composite to a drop-weight impact event [S].

DOI: 10.1520/d7136_d7136m-12