Stress analysis of rotating disk made by C/C laminates

摘要

C/C composites are good candidate materials for high-temperature aerospace structures. In the authors' research group, spin test experiments of 2D laminated C/C disks were performed, to study the deformation and busting failure properties of these materials under centrifugal loading. Generally, 2D laminated composites are orthotropic elastic. In this paper, in order to understand the complicated deformation behavior of an orthotropic rotating disk, a Ritz-type elastic analysis based on variation theory was proposed. By adequately assuming the deformation functions, the distributions of displacement, strain and stress components within the disk can be evaluated quickly and accurately. By comparing the experimental results to the analytical results, the fundamental data of the C/C materials: elastic properties, shearing strength, etc., are determined.