Abstract:In this paper, the traditional three鄄point short beam shear test and a modified three鄄point short
beam shear test were used for measurement of interlaminar shear strength of needling C/ C composites nozzle exten鄄
sion. The test results showed, the modified method well reduced the stress concentration phenomenon that the tradi鄄
tional method caused, and specimems occurred interlaminar shear failure more easily. Moreover, the test values of the
modified method were higher than the traditional method,and more approach to the fact. Lastly, the weakness position
of failure test specimems of the modified three鄄point short beam shear test was found by scanning electron microscopy,
and made a suggestion on material preparation process.
