Evaluating Tensile Properties of Wool Fibers Based on the Waveform of Acoustic Emission

As an indirect measurement, acoustic emission (AE) of fiber break reflects the deformation energy during rupturing. It can be employed to evaluate the tensile properties of single fiber in fiber-bundle tensile test. In this paper, the extension of single wool fiber in the fiber-bundle are calculated using AE method. Comparing to the control samples whose extension distribution is derived from the stress-strain curve of fiber bundle, it is believed that the extension distribution calculated from AEs is more accurate and reliable, since it is not affected by the discreteness of fiber strength. The experimental results also show that there is a good linear relationship between the break force of single wool fibers and their AE energy.