Load-bearing properties of typical ceramic matrix composite structures have rarely been studied. In this paper

the damage and fracture characteristics of 2D–C/SiC channel beams under bending-twist combined loadings were investigated experimentally. The load-bearing properties

damage process and failure mechanisms of the beam specimens were analyzed through strain monitoring and crack observation. It reveals that delamination and buckling are the main damage modes of 2D–C/SiC channel beam under complex loading

and the fracture process of the specimens is extremely complicated

accompanying with fluctuant and mutational strain response

meanwhile

its mechanical property is significantly degraded resulting in a low ultimate load carrying capacity. Comparing with intact specimen

the damage and fracture mechanism of the counterpart with open-hole is changed

and the delamination initiation and local buckling loads are obviously reduced.