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The influences of the fiber volume fraction on the electrical conductivity and the fraction change of electrical resistance under three-point-bending test were discussed. It is found that the relationship between the electrical conductivity of composites and the fiber volume fraction can be explained by the percolation theory and the change of electrical resistance of specimens reflects to the process of loading. The sensitivity and the response of the change of electrical resistance to the load for specimens with different fiber volume fractions are quite different, which provide an important guide for the manufacture of conductive and intrinsically smart carbon fiber composite.
The influences of the fiber volume fraction on the electrical conductivity and the fraction change of electrical resistance under three-point-bending test were discussed. It is found that the relationship between the electrical conductivity of composites and the fiber volume fraction can be explained by the The sensitivity and the response of the change of electrical resistance to the load for specimens with different fiber volume fractions are quite different, which provide an important guide for the manufacture of conductive and intrinsically smart carbon fiber composite.