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Abstract

Investigated are the effects of face layup sequence and core density of a sandwich plate on the impact delamination area of the laminated facesheet. The sandwich plate is made of graphite/epoxy faces and Nomex honeycomb core. The size and shape of delamination due to impact at each interply location have been measured by the room tem perature deply technique. The shape of the interply delamination under impact is, in gen eral, found to be two-lobed. The shape exhibits very peculiar regularity under various ex perimental conditions. The quantitative measurement of delamination size has shown that the face layup with small relative orientation between adjacent plies and high density core are desirable in sandwich plates to reduce the impact delamination.

Keywords

composite laminated sandwich impact delamination deply technique impact resistance.

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References

Zakas, J.A. , T. Nicholas , H.F. Swift , L.B. Greszczuk and D.R. Curran. 1982. Impact Dynamics. New York: John Wiley and Sons.

Joshi, S.P. and C.T. Sun. 1985. "Impact Induced Fracture in a Laminated Composite," J. of Composite Materials, 19(1):51-66.

Potter, R.T. 1985. Proc. Int. Gonf. Post Failure Analysis Techniques for Fiber Reinforced Composites, Dayton, Ohio, USA.

Clark, G. 1989. "Modelling of Impact Damage in Composite Laminates," Composites, 20(3):209-214.

Hong, S. and D. Liu. 1989. "On the Relationship between Impact Energy and Delamination," Experimental Mechanics, 29(2):115-120.

Sharma, A.V. 1981. "Low-Velocity Impact Tests on Fibrous Composite Sandwich Structures," Test Methods and Design Allowables for Fibrous Composites, ASTM STP 734, C. C. Chamis, ed., American Society for Testing and Materials , pp. 54-70.

t'Hart, W.G.J. 1981. "The Effect of Impact Damage on the Tension-Compression Fatigue Properties of Sandwich Panels with Face Sheets of Carbon/Epoxy," National Aerospace Laboratory, Amsterdam (Netherlands).

Bernard, M.L. and P.A. Lagace. 1989. "Impact Resistance of Composite Sandwich Plates," J. of Reinforced Plates and Composites, 8:432-445.

Shih, W.K. and B.Z. Jang. 1989. "Instrumented Impact Testing of Composite Sandwich Panels ," Journal of Reinforced Plastics and Composites, 8:270-298.

10.

Aleszka, J.C. 1978. "Low Energy Impact Behavior of Composite Panels," Journal of Testing and Evaluation, JTEVA , 6(3):202-210.

Impact Resistance of Composite Laminated Sandwich Plates

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References