Abstract
This article presents an investigation on the mechanical properties of porous interlayers between fiber bundles and matrix in three-dimensional (3D) carbon/carbon composite. Micro computer tomography systems are employed to observe the microstructures in situ and nondestructively in the porous interlayers. Statistical analyses are utilized to obtain microstructure parameters. Mechanical models are developed to describe the mechanical behavior of these porous interlayers. Using microstructure parameters in the calculation model, mechanical properties of porous interlayers are obtained. The calculation results and experiment results by push out tests are accordant. Results show that the mechanical properties of porous interlayers are inhomogeneous and discrete.
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