Experimental Determination of Stress Concentrations in Composite Laminates and their Effects on Damage Evolution


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Composite laminates are used for the construction of a wide range of products; from civil infrastructure to aeronautical or space structures. Since all these structures cannot be built at once, but they are composed by several structural elements connected in various patterns, the problem of stress concentrations strikes importantly. Additionally, the structures are often designed in a “fail safe” manner, which bespeaks the damage tolerance of the material. This means that the structural element and the structure are called to operate in the presence of various forms of damage. Damage locations within a structural element or a structure cause stress rising. In the present paper experimental investigation of the stress concentration arising in composite laminates, (a) around a circular notch and (b) due to damage onset and growth during their lifetime, is presented. The experimental results are compared to analytical model predictions.



Edited by:

Patrick Sean Keogh




D.T.G. Katerelos and C. Galiotis, "Experimental Determination of Stress Concentrations in Composite Laminates and their Effects on Damage Evolution", Applied Mechanics and Materials, Vols. 5-6, pp. 383-390, 2006

Online since:

October 2006




[1] B.P. Arjyal, D.G. Katerelos, C. Filiou and C. Galiotis: Exp. Mech. Vol. 40 (2000), p.248.

[2] R.M. Jones: Mechanics of Composite Materials (McGraw-Hill, New York 1975).

[3] J. Parthenios, D. Katerelos, G. Psarras and C. Galiotis: Eng. Fr. Mech. Vol. 69 (2002), p.1067.

[4] D.G. Katerelos, L.N. McCartney and C. Galiotis: Acta Mater. Vol. 53 (2005), p.3335.

[5] J.W. Dally and W.F. Riley: Experimental Stress Analysis (McGraw-Hill Int, New York 1991).

[6] C. Galiotis, in: Microstructural Characterisation of Fiber Reinforced Composites, edited by J. Summerscales, Woodhead (1998).

[7] B. Arjyal, C. Galiotis, S. Ogin and R. Whattingham: Jrnl. Mater. Sci. Vol. 33 (1998), p.2745.

[8] C. Vlattas and C. Galiotis: Polymer Vol. 35 (1994), p.2335.

[9] D.G. Katerelos and C. Galiotis: App. Phys. Lett. Vol. 85 (2004), p.3752.

[10] L.N. McCartney: Comp. Sci. Tech. Vol. 58 (1998), p.1069.

[11] S.G. Lekhnitskii: Anisotropic Plates 2nd ed., S. W. Tsai and T. Cheron, trans. (Gordon and Breach Science, New York 1968).

[12] G.N. Savin: Stress Concentration Around Holes, E. Gros, trans., W. Jhonson, ed., (Pergamon Press, Oxford 1961).

[13] S. Tan: Stress Concentrations in Laminated Composites (Technomic, New York 1994).

[14] C. Galiotis, V. Chohan, A. Paipetis, and C. Vlattas, in: ASTM-STP 1290, edited by J.C. Spragg and L.T. Drzal, (American Society for Testing and Materials, 1996).