NDTnet 1998 Aug, Vol.3 No.8

Abstract

The interlaminar strength of carbon fibre reinforced composites has been improved by adding amorphous thermoplastic polyamide particles at the prepreg interface. This process gives a material with high compressive strength after impact and its use is becoming more widespread in the aerospace industry. Because the use of this reinforced material composite for aircraft primary structures is relatively recent, there has been very few non-destructive analyses studying the effect of low energy impact damage on such material. Impact damage may cause delamination and reduce the compressive strength of composite laminates; thus such defect must be efficiently detected and accurately sized. The effect of ply orientation on the impact resistance of thermoplastic toughened thermoset resins polymeric matrix composites has been studied using multiple non-destructive testing (NDT) techniques. Non-destructive evaluation of impacted [0/45/-45/90] and [0/90] thermoplastic toughened thermoset resin polymeric matrix panels was carried out. Experimental results of these non-destructive inspections were used to determine which of the two ply orientations provides higher impact resistance. A comparison of impact damage propagation between these two ply orientations was made. In addition, the performance of the NDT techniques used in function of ply orientation was assessed and the most appropriate NDT method for the inspection of carbon fibre reinforced material with different ply orientations proposed.

Abstract Source:
Preview of Abstracts, International Conference on Advanced Materials - 1998, Hurghada, Egypt, 15 - 18 December 1998

Full-Text Source:
International Conference on Advanced Materials - 1998, Hurghada, Egypt, 15 - 18 December 1998

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