Methods for experimental research of carbon fiber reinforced plastics with damages for fan blades

Abstract

Annotation The paper is devoted to the methods of experimental studies of carbon fiber reinforced plastics strength with damage of various categories. The first part of the work is devoted to the analysis of the existing damage classification for aircraft parts made of polymer composite material, as well as the development of a quasi-static punching method for their application to carbon fiber samples. In the second part of the work, experimental studies of the residual tensile strength of carbon fiber T144 with damages of various categories are presented. The dependence of the residual tensile strength on the punching energy is obtained. Based on the obtained data and recommendations of the FAA, the permissible levels of tensile stresses for carbon fiber T144 were 529 MPa, which is two times higher than the calculated level of the CIAM fan blade model tensile stresses from this material in the operating mode. The reported study was funded by RFBR according to the research project No. 18-29-18071\18.