Compressional behaviour of carbon fibres
Compressional behaviour of carbon fibres
复制标题
DOI：
10.1007/bf03372169
复制
发表时间：
1990-02
影响因子：
4.5
通讯作者：
M. Dobb;D. J. Johnson;C. R. Park
中科院分区：
文献类型：
--
作者：
M. Dobb;D. J. Johnson;C. R. Park
The compressional behaviour of polyacrylonitrile (PAN)-based and mesophase-pitch (MP)-based carbon fibres has been studied by means of a single-fibre-recoil test method followed by scanning electron microscope (SEM) examination. PAN-based carbon fibres have relatively high compressive strengths compared with MP-based carbon fibres. The improved tensile and compressive strengths of some recent PAN-based fibres are discussed in terms of a two-phase structure; one phase is the normal layer-plane structure, the other phase is a disordered carbon structure. The relatively low compressive strengths of the MP-based fibres are considered to be due to the high degree of order (graphitization) and their inherent sheet-like structure. SEM micrographs of compressed fibres show different types of failure depending upon the origin of the fibres. Consequently, two different mechanisms of deformation have been proposed, namely the formation of multiple kink bands associated with bending in the case of PAN-based fibres, and a single kink band associated with classical shear failure in the case of most MP-based fibres.
