• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Materials Science and Engineering >Internal friction behavior of unidirectional carbon/carbon composites after different fatigue cycles
【24h】

Internal friction behavior of unidirectional carbon/carbon composites after different fatigue cycles

机译：不同疲劳循环后单向碳/碳复合材料的内摩擦行为

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Internal friction behavior was utilized as an indirect metric to study structural change in carbon/carbon composites after fatigue tests. In this work, two kinds of unidirectional carbon/carbon composites with different densities were prepared by isothermal chemical vapor infiltration (ICVI), and loaded under stress level of their fatigue limit. The internal friction behavior of the composites after different fatigue cycles was studied. After the initial 10~4 fatigue cycles, since the matrix began to break and shed, frictional damping that happened between the fiber and matrix interfaces increased and the bulk internal friction increased rapidly. Between 10~4 and 5 × 10~5 fatigue cycles, holes formed at interfaces because of continued shedding of the matrix. Since the holes reduced contact area between different phases, frictional damping decreased, as along with the internal friction increment ratio. Between 5 × 10~5 and 10~6 fatigue cycles, interfacial bonding between carbon fiber and matrix was in a steady state, so structure and internal friction of the composites did not change. The results revealed that internal friction was an effective method to characterize structural change of carbon/carbon composites after fatigue tests.
机译：内部摩擦行为被用作研究疲劳试验后碳/碳复合材料结构变化的间接指标。本工作通过等温化学气相渗透法制备了两种不同密度的单向碳/碳复合材料，并在其疲劳极限应力水平下加载。研究了复合材料在不同疲劳循环后的内摩擦性能。在最初的10〜4个疲劳周期后，由于基体开始破裂和脱落，纤维与基体界面之间发生的摩擦阻尼增加，整体内部摩擦迅速增大。在10〜4和5×10〜5疲劳周期之间，由于基体的持续脱落，在界面处形成了孔。由于孔减小了不同相之间的接触面积，因此摩擦阻尼以及内部摩擦增量比都减小了。在5×10〜5和10〜6疲劳周期之间，碳纤维与基体之间的界面粘结处于稳定状态，因此复合材料的结构和内摩擦均未发生变化。结果表明，内部摩擦是表征疲劳试验后碳/碳复合材料结构变化的有效方法。

著录项

  • 来源
    《Materials Science and Engineering》 |2014年第10期|129-134|共6页
  • 作者

    Jing Cheng; He-jun Li; Shou-yang Zhang; Li-zhen Xue; Wen-fei Luo;

  • 作者单位

    State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, PR China;

    State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, PR China;

    State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, PR China;

    State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, PR China;

    State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, PR China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Unidirectional C/C composite; Internal friction; Fatigue;

    机译：单向C / C复合材料;内部摩擦;疲劳;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号