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In this study, a novel approach for health monitoring in textile composites is reported. Coating glass fibre (GF) yarns with a carbon nanotube (CNT) filled film former results in the formation of electrically conductive paths on the GF surface. By embedding the CNT modified yarns into a polypropylene matrix, a functional interphase is created which can be used for highly localised health monitoring in textile composites. The health monitoring is based on the resistance change of the percolated CNT network in the composites interphase due to applied external stresses. The interphase sensor can be used for an indirect measurement of interphase strain as well as for the determination of the accumulated interphase damage during mechanical loading. Moreover, the system is sensitive to the breakage of the reinforcement fibres.
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Rausch et al. (2011) studied this question.
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