Effects of z-pin’s porosity on shear properties of 2D C/SiC z-pinned joint
| Autor: | Litong Zhang, Chidong Liu, Yi Zhang, Jiaxin Zhang, Xiaowei Yin |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science 02 engineering and technology 021001 nanoscience & nanotechnology Rigid body 01 natural sciences Transverse plane Shear (geology) Chemical vapor infiltration 0103 physical sciences Ultimate tensile strength Ceramics and Composites Rotational deformation Composite material 0210 nano-technology Porosity Failure mode and effects analysis Civil and Structural Engineering |
| Zdroj: | Composite Structures. 173:106-114 |
| ISSN: | 0263-8223 |
| Popis: | In this paper, 2D C/SiC z-pinned joint is prepared via chemical vapor infiltration. Effects of z-pin’s porosity on shear properties of z-pinned joint are investigated from the failure mode and the shear damage mechanisms. The results show that the average joint shear strength decreases asymptotically from 249.9 MPa to 97.2 MPa as the total porosity of 2D C/SiC z-pin increases from 14.4% to 27.3%. For each porosity, the joint shear strength is between the tensile strength and the in-plane shear strength of 2D C/SiC, which is rationalized by the rigid body sliding model of 2D C/SiC. Because high porosity leads to large rotational deformation of transverse fibers, a critical porosity about 17.7% is observed from shear-controlled failure to bending-controlled failure. A cohesive fracture model is developed to build the relation between the joint shear strength and the mechanical properties of 2D C/SiC. Very good accuracy is obtained. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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