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Cryogenic temperature effects on the mechanical properties of carbon, aramid, and PBO fibers.

机译:低温温度对碳纤维,芳族聚酰胺纤维和PBO纤维的机械性能的影响。

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摘要

This study examines the effects of cryogenic temperatures on the mechanical properties of carbon, aramid, and poly(p-phenylene-2, 6-benzobisoxazole) (PBO) fibers. Although the mechanical properties are documented for these fibers at ambient and elevated temperatures, there is an absence of data in the open literature for how these fibers behave at very low temperatures. To evaluate the mechanical properties, the ASTM standard method for testing at ambient temperature was used as a baseline. The low temperature tests were conducted inside a double walled cryogenic chamber to evaluate the fiber performance at 100K. Fiber properties at low temperatures displayed differences from room temperature properties in the form of increased ultimate tensile strength (UTS), decreased in elongation to failure, and increased Young's Modulus. The change in properties due to the effect of temperature was more pronounced in fibers with a higher degree of crystallinity.
机译:这项研究检查了低温对碳,芳族聚酰胺和聚(对亚苯基-2,6-苯并双恶唑)(PBO)纤维的机械性能的影响。尽管记录了这些纤维在环境温度和高温下的机械性能,但公开文献中没有有关这些纤维在非常低的温度下的性能的数据。为了评估机械性能,将在环境温度下进行测试的ASTM标准方法用作基准。在双壁低温室内进行低温测试,以评估100K时的纤维性能。低温下的纤维性能以增加的极限拉伸强度(UTS),降低的断裂伸长率和增加的杨氏模量的形式表现出与室温性能的差异。在较高的结晶度的纤维中,由于温度的影响引起的性能变化更为明显。

著录项

  • 作者

    Hastings, William Chad.;

  • 作者单位

    Mississippi State University.;

  • 授予单位 Mississippi State University.;
  • 学科 Engineering Mechanical.
  • 学位 M.S.
  • 年度 2008
  • 页码 47 p.
  • 总页数 47
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 机械、仪表工业;
  • 关键词

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