Synergy effect in the addition of nanoreinforcements in matrix and onto the continouos fiber for composite structural health monitoring

Abstract

The aim of the research is focused on the manufacture of multiscale reinforced composites with self-monitoring capabilities. In order to achieve it, reference material based on epoxy resin and glass fiber fabric has been modified by the addition of carbon nanotubes which allow the creation of a nanoreinforcement electrically conductive percolation network. The registration of electrical resistance variations due to strain or damage can be used to monitorize these effects caused by the mechanical loads. The research also studies the modification of the electrical properties (electrical conductivity measured in both transverse and longitudinal directions) and interlaminar mechanical properties caused by the use of nanoreinforced resins or surface modified fabrics. Multiscale reinforced composites manufactured allow the detection and partial location of damage caused during the interlaminar strength test. Moreover, differences in sensitivity due to manufacturing method and nanoreinforcement used have been clarified.