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C/C复合材料压缩破坏的应变率效应研究
  • 期刊名称：无机材料学报, 2007, 22(2):311-314
  • 时间：0
  • 分类：TB332[一般工业技术—材料科学与工程]
  • 作者机构：[1]西北工业大学航空学院,西安710072, [2]西北工业大学材料科学与工程学院,西安710072
  • 相关基金：国家自然科学基金（90405016）
  • 相关项目：空天飞行器材料与结构的性能评价及关键理论研究
关键词： C/C复合材料, 动态压缩, 应变率效应, C/C composites, dynamic compression, strain rate sensitivity
中文摘要：

利用电子万能试验机与整形修正的Split Hopkinson Pressure Bar（SHPB）研究了碳布叠层／碳复合材料在四种不同应变率下的压缩性能，对其在准静态、动态载荷下的压缩破坏机理进行了初步的探讨．研究结果表明：C／C复合材料的压缩破坏强度具有较强的应变率效应，与准静态（10^-4s）相比，复合材料的动态（1．5×10^2s）压缩强度可提高70％左右；复合材料在准静态、动态载荷下力学性能的差异可归结为纤维与基体界面特性的应变率效应以及不同应变率下破坏模式的不同．

英文摘要：

To understand the strain rate sensitivity of compressive strength of carbon clothe/carbon （C/C） composites, quasi-static and dynamic compressive experiments were conducted in its x-y plane by means of electric universal test machine and Split Hopkinson Pressure Bar with pulse shapers. The experimental results show that the dynamic compressive fail strength of C/C composites has strong stain rate sensitivity and it increases with strain rate. Compared with the quasi-static compression, the dynamic compressive strength is higher by 70% or so. Meanwhile, the samples are failed by shearing under quasi-static loading, and by crushing under dynamic loading. The different mechanical behaviors from the experimental results indicate that it may be related to the strain rate sensitivity of interfaces characteristic of C/C composites and the change of the failure modes.

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空天飞行器材料与结构的性能评价及关键理论研究
期刊论文 135 会议论文 11
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