EVALUATION OF THE EFFECT OF IMPACT DAMAGE ON THE FATIGUE LIFE OF CARBON FIBRE COMPOSITES

D. Kytýr, T. Fíla, J. Valach, M. Šperl, J. Bryscejn

Abstract

Carbon fibre in polyphenylene sulfide composites became popular material in aircraft industry but its fragility to impact loading limits the application of these composites in aircraft primary structures. The article deals with experimental investigation of the response of damaged composite. Material degradation of intact and damaged specimens during fatigue tests was investigated. As damage parameters the changes in natural frequencies, ultrasound wave propagation and bending stiffness were chosen. In the article the entire fatigue life of intact and damaged specimens was studied by all the presented methods and the accuracy and reliability of assessment of damage parameters were compared.

Keywords

impact damage, carbon fibre composites, material degradation

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DOI

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IMEKO TC

TC15 - Experimental Mechanics

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