Paper number 433

SMART NDT USING ELECTRICAL RESISTANCE METHOD FOR DELAMINATION MONITORING IN CFRP

Kaori YUSE and Claude BATHIAS

Laboratoire de Métallurgie, CNAM-ITMA

Summary

The electrical resistance method is one of Non-Destructive-Testing method for damage monitoring in CFRP which uses resistivity of carbon fibers which are already embedded in the structure. This means, it is one of the ideal method of intelligent materials because reinforced materials on structure level themselves can be a sensor. It is, however, still on fundamental research. The relation between resistance and fiber breakage has been widely concerned, but not so mach with delamination, moreover no one on fatigue test among author's knowledge. To consider the relation between resistance and delamination, mode I tensile and fatigue tests with original electrode were carried out. Then, the factors which can effect to the value of resistance and micro mechanism were discussed in this paper.

Keywords

Electrical resistance method, intelligent materials, NDT, delamination, fatigue, mode I, crack propagation.