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应力比对2．5DC／C复合材料弯－弯疲劳行为的影响
  • ISSN号：1001-3741
  • 期刊名称：《炭素技术》
  • 时间：0
  • 分类：TB332[一般工业技术—材料科学与工程]
  • 作者机构：[1]西北工业大学凝固技术国家重点实验室,陕西西安710072
  • 相关基金：国家自然科学基金（50832004）,教育部博士点基金（201261021100130）
作者： 郭领军[1], 潘小娟[1], 李贺军[1], 李克智[1], 张守阳[1]
关键词： C/C复合材料, 弯-弯疲劳, 应力比, 剩余弯曲强度, 疲劳行为, C/C composites, bend-bend fatigue, stress ratio, residual flexural strength, fatigue behavior
中文摘要：

在不同应力比条件下对2．5DC／C复合材料试样进行了弯一弯疲劳循环加载试验．用三点弯曲法测定了2．5DC／C复合材料试样在疲劳试验前后的弯曲强度，利用扫描电镜观察了其断口形貌，并分析了2．5DC／C复合材料的疲劳强化机理。结果表明：2．5DC／C复合材料的热解炭结构是内层的光滑层与外层的各向同性层组织结构。疲劳循环加载后，不同应力比条件下2．5DC／C复合材料的剩余弯曲强度均得到提高，且应力比为O．2时，剩余弯曲强度最大，约为174．0MPa，较静态弯曲强度提高了93．8％。

英文摘要：

The fatigue behavior of 2.5D C/C composite samples under different stress ratios was investigated in flexural mode. Stat- ic flexural strength before fatigued testing and residual flexural strength of the samples after fatigued testing were tested. The mi- crostructure of the pyrolytic carbon and fracture morphology of the samples were studied by polarized light microscope and scanning electron microscope, respectively. The results show that the pyrolytic carbon of the samples consists of smooth laminar and isotropic structure. The residual flexural strength of 2.5D C/C composites is improved under different stress ratios and fatigue cyclic loading testing increase. And when the stress ratio is 0.2, the residual flexural strength of 2.5D C/C composites reached the maximum value of 174.0 MPa, which is higher 93.8% than the static flexural strength.

同期刊论文项目
C/C复合材料疲劳特性及强韧化机理研究
期刊论文 79 会议论文 11 专利 2
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期刊信息
  • 《炭素技术》
  • 北大核心期刊（2011版）
  • 主管单位:吉林炭素有限公司
  • 主办单位:吉林炭素有限公司
  • 主编：贾文涛
  • 地址：吉林市哈达湾和平街9号
  • 邮编：132002
  • 邮箱：tsjsbjb@126.com
  • 电话：0432-62749715
  • 国际标准刊号：ISSN：1001-3741
  • 国内统一刊号：ISSN：22-1147/TQ
  • 邮发代号:12-308
  • 获奖情况:
  • 国内外数据库收录:
  • 俄罗斯文摘杂志,美国化学文摘（网络版）,中国中国科技核心期刊,中国北大核心期刊（2011版）,中国北大核心期刊（2014版）
  • 被引量:3736