公开(公告)号：US12060300B2

公开(公告)日：2024-08-13

申请号：US17586384

申请日：2022-01-27

Applicant: Nanjing University of Aeronautics and Astronautics

Inventor： Xiguang Gao ,  Yingdong Song ,  Guoqiang Yu ,  Sheng Zhang ,  Xiaoting Shi ,  Zheng Ni

IPC: G01N33/38 ,  C03C10/00 ,  C04B35/52 ,  C04B35/80

CPC classification number: C04B35/52 ,  C03C10/0036 ,  C04B35/80 ,  G01N33/388 ,  C03C2214/20

Abstract: A method is provided for calculating gaseous diffusion and oxidation evolution of a ceramic matrix composite (CMC) structure, which includes determining temperature and load distribution in a structural member; determining matrix crack distribution in the structure; establishing an equivalent diffusion coefficient model of a fiber bundle scale to predict a gas flow channel in a fiber bundle: averaging a total amount of gaseous diffusion in the channel to establish the equivalent diffusion coefficient model of the fiber bundle composite scale related to the matrix crack distribution; establishing a representative volume element (RVE) model; establishing an equivalent diffusion coefficient model of a RVE scale; calculating the distribution of the gas concentration and oxidation products in the structure; calculating a growth thickness of an oxide at cracks and pores in each element; and updating sealing conditions of the gas channel, and calculating a new equivalent diffusion coefficient field and the distribution of the oxidation products again.