Abstract
Acoustic Emission (AE) characteristics of micro-failure process in short fiber reinforced polycarbonate were studied. Matrix cracking, fiber/matrix interface debonding, and fiber breaking occurred complicatedly and in connection with each others. Representative AE frequency depends on Elastic modulus and density of fractured materials. Therefore, it is possible to distinguish matrix cracking and fiber breaking in composite by AE frequency analysis. The other side, fiber/matrix interface debonding has AE frequency both matrix and fiber. So, in this paper, three characteristic AE frequency bands to recognize these micro-failures were specified by using model specimen. Furthermore, studying power of these frequency bands in composite for strain, behaviors and occurrences of three micro-failures were discussed.
