Study on Mechanical Properties of 3D4d Woven SiCf/SiC Composites Based on Experiment and Model Prediction

Abstract

The mechanical properties of KD-II type silicon carbide fiber braided three-dimensional four-directional (3D4d) SiCf/SiC woven composites fabricated by PIP method were studied in this paper. The computed tomography (CT) technology was used to observe the cross section shape and orientation of the fiber bundles inside woven composite materials, and digital image correlation (DIC) method was used to measure deformation, during the tensile tests of the composites. Theoretical and numerical methods were adopted to predict mechanical properties of the 3D4d SiCf/SiC woven composites, and effectiveness of different methods was discussed based on the comparison of results obtained from the experiments and prediction model.