一种测试C/ C 扩张段层间剪切强度的改进三点短梁剪切法
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西安航天动力技术研究所

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A Modified Three鄄Point Short Beam Shear Test for Measurement ofInterlaminar Shear Strength of C/ C Composites Nozzle Extension
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    摘要:

    分别采用传统三点短梁剪切法和改进三点短梁剪切法对扩张段所采用的针刺C/ C 复合材料进
    行了层间剪切强度测试试验。结果显示,改进的三点短梁剪切法很好地解决了传统三点短梁剪切法的应力集
    中现象,试件更容易发生层间剪切破坏;改进的三点短梁剪切法的测试结果一般要大于传统三点短梁剪切法
    的,更接近材料实际水平。对改进的短梁剪切法试验破坏试样进行电镜扫描分析,指出了发生破坏的薄弱点,
    提出了要提高材料的层间剪切性能可合理优化网胎层厚度的改进建议。。

    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.

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赵昆.一种测试C/ C 扩张段层间剪切强度的改进三点短梁剪切法[J].宇航材料工艺,2013,43(5).

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  • 在线发布日期: 2016-11-28
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