The bearing capacity and the damage process of the ceramic matrix composites L-shaped specimens with defects

doi:10.19936/j.cnki.2096-8000.20230628.006

Abstract

Abstract: Based on the image reconstruction technology, we develop finite element models of the representative volume and L-shaped specimens of ceramic matrix composites, through which the elastic modulus of ceramic matrix composites is predicted. With a combination of numerical simulations and experiments, the bearing capacity and damage process of L-shaped specimens under tensile are studied. The results show that experiment and simulation results are in good consistency regarding the influence of defects on the bearing capacity, and the quantity difference is about 10%. The inner corner of specimens is mainly subjected to tension, while the outside area is subjected to compression. Defects on the inner corner affect the bearing capacity of specimens. The bearing capacity degrades as the defect area broadens. However, defects on the outside of specimens affect the damage process. Microscopic defects propagate and eventually lead to macroscopic failures of the specimen, mainly in the form of material delamination. This study can provide a reference for the testing and analysis of the bearing capacity of ceramic matrix composites.

Key words: ceramic matrix composites, L-shaped specimens, bearing capacity, damage process, strength analysis, quasi-static loading

CLC Number:

TB332

ZHOU Junchen, GENG Qian, DUAN Yubin, WANG Dongliang. The bearing capacity and the damage process of the ceramic matrix composites L-shaped specimens with defects[J]. COMPOSITES SCIENCE AND ENGINEERING, 2023, 0(6): 37-43.

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