Compressive testing and failure analysis of three-dimensionally reinforced carbon/carbon composites
WEI Li-ming1,2, ZHANG Yue3, XU Cheng-hai1, MENG Song-he1, TIAN Xiao-xiao1
1.Center for Composite Materials,Harbin Institute of Technology,Harbin 15008,China;2.Institute of Structure Mechanics, CAEP,Mianyang 621900,China;3.School of Foreign Languages,Harbin Institute of Technology,Harbin 150001,China
Abstract:
It is important to reveal the performance of carbon/carbon composites subjected to complex loading, which can provide a basis for developing the failure laws of carbon/carbon composites. The uniaxial and biaxial compressive performances of three-dimensional reinforced carbon/carbon composites (3D C/C) were investigated in this paper. The results showed that the compressive strength becomes larger when the loading direction parallels to the z-direction of 3D C/C. The uniaxial compression failure was mainly caused by fracture fiber bundles to form an overall shear fault in the z-direction. The failure mode was delamination of fiber bundle/matrix interface for the x- and y-direction samples. The biaxial compressive failure of x-y direction compressioncompression specimen was caused by the low interlaminar shear strength. In addition,for y-z and z-x direction compression-compression samples,the shear-type failure was formed on the surface of the specimen plumbing the loading direction. Overall,the weak-interface is still a main factor to influent the fracture mechanism of 3D C/C.
Key words: C/C composites microstructure biaxial testing failure mode
DOI：10.11916/j.issn.1005-9113.2012.01.004
Clc Number:TB332
Fund:
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Compressive testing and failure analysis of three-dimensionally reinforced carbon/carbon composites
本站小编 哈尔滨工业大学/2019-10-24
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