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Determination of the interlaminar shear strength of C/C composites by compression shear tests

: Thielicke, B.; Soltesz, U.; Maschke, H.-G.

Vincenzini, P.:
Advanced structural fiber composites : proceedings of Topical Symposium 3 on Advanced Structural Fiber Composites of the 8th CIMTEC-World Ceramics Congress and Forum on New Materials, Florence, Italy, June 28 to July 4, 1994
Faenza: Techna Srl, 1995 (Advances in science and technology 7)
ISBN: 88-86538-06-5
CIMTEC <8, 1994, Florenz>
Conference Paper
Fraunhofer IWM ()
BEM-Rechnung; CFe; Druck-Scherversuch; Faserverbundwerkstoff; interlaminare Scherfestigkeit; Spannungsanalyse

Recent investigations demonstrated that the standardized tests for the determination of the Interlaminar Shear Strength (ILSS) , e.g. the short-beam-test or the Iosipescu-test, do not yield reliable characteristic strength values. This is due to the complex stress distributions which arise In these set-ups, and in particular, because of the influence of the superimposed normal stresses on the failure behaviour of laminated C/C materials. Therefore, a new procedure was proposed earlier. It consists in grooved specimens which are loaded parallel to the laminae. The behaviour under compressive loading is considered In this paper. Experimental and numerical investigations were performed to optimize the size and the shape of the specimens.