Experimental research on tensile process of carbon fiber composite materials basing on acoustic emission

Abstract

With the extensive application of carbon fiber composite materials in the region of high-pressure vessel and aerospace, the related material damage mechanism analysis and integrality detecting is also massively being carried out which is more complex than the sole material. Acoustic emission technique can monitor the tensile process of carbon fiber composite laminate. And the acoustic emission signals by tensile specimens of different winding angles were investigated. Different angles in specimen’s layers of carbon fiber had different mechanical properties and failure mechanisms. The results show that there were different signal characteristics from carbon fiber in different stages. Analysis on experimental data showed that acoustic emission testing technique can determine the process of different internal activities in carbon fiber composite laminate.