Impact-Induced Fracture in Laminated Plates and Shells

Abstract

A study of the impact damage of laminated plates and cylindrical shells was conducted by experimental and numerical analysis. The curvature effect on the impact damage of composites was investigated. Laminating sequences of [0°₅/90°₅/0°₅] and [90°₅/0°₅/90°₅ were considered. Detailed presentation of impact damage was provided through photographs and schematic diagrams. It is found that there are matrix cracks in the lower layer and delamination in the lower interface in plates, while the fiber crack in the upper layer, shear crack in the middle layer and delamination in the upper and lower interfaces are observed in cylindrical shells. A numerical analysis to predict and explain the crack initiation of laminated plates and cylindrical shells was also established.

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References

Baker, A.A. , R. Jones and R.J. Callinan. 1985. "Damage Tolerance of Graphite/Epoxy Composite," Composite Structures, 4:15-44.

Chao, C.C. , T.P. Tung and S.C. Lee. 1987. "Response of Orthotropic Cylindrical Shells Subjected to Impact Loading," International Conference on Advanced Composite Materials and Structures, Taipei, Taiwan, pp. 705-716.

Lin, H.J. and Y.J. Lee. 1989. "On the Inelastic Impact of Composite Laminated Plate and Shell Structures," will appear in Composite Structures.

Lin, H.J. and Y.J. Lee. 1989. "Use of Statical Indentation Laws in the Impact Analysis of Composite Laminated Plates and Shells," will appear in Journal of Applied Mechanics.

Joshi, S.P. 1985. "Impact Damage Characterization in Laminated Composites ," Ph.D. Dissertation, Purdue University.

Takata, N. 1980. "Experimental Studies of the Delamination Mechanisms in Impacted Fiber-Reinforced Composite Plates," Ph.D. Dissertation, The University of Florida.

Yang, S.H. and C.T. Sun. 1982. "Indentation Law for Composite Laminates ," ASTM, STP 787, I. M. Daniel , ed., pp. 425-449.

Yang, T.Y. and C.T. Sun. 1973. "Finite Element for the Vibration of Framed Shear Walls," Journal of Sound and Vibration, 27(3):297-311.

Yang, S.H. 1981. "Static and Dynamic Contact Behavior of Composite Laminates ," Ph.D. Dissertation, Purdue University.