1.1 本试验方法涵盖了单纤维（从纤维束或线轴获得）的制备、安装和测试，以测定环境温度下的抗拉强度和杨氏模量。本测试标准涵盖高级陶瓷、玻璃、碳和其他纤维。 1.2 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.3 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 该测试方法确定的性能有助于在研发水平上评估新纤维。直径达250×10的纤维 –6 m包含在本试验方法中。非常短的纤维（包括胡须）需要专门的测试技术 ( 1. ) 3. 本试验方法不包括。该测试方法也可用于聚合物、金属或陶瓷基复合材料中应用的候选纤维的初步筛选，以及用于质量控制目的。由于其性质，陶瓷纤维没有独特的抗拉强度，而是抗拉强度的分布。在大多数情况下，当纤维的抗拉强度由一组缺陷控制时，可以使用两个- 参数威布尔分布，尽管也提出了其他分布 ( 2. , 3. ) . 本试验方法构成了获得单纤维抗拉强度的方法。为了确定纤维抗拉强度分布的参数，建议结合实践遵循本试验方法 C1239 .

1.1 This test method covers the preparation, mounting, and testing of single fibers (obtained either from a fiber bundle or a spool) for the determination of tensile strength and Young's modulus at ambient temperature. Advanced ceramic, glass, carbon, and other fibers are covered by this test standard. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 Properties determined by this test method are useful in the evaluation of new fibers at the research and development levels. Fibers with diameters up to 250 × 10 –6 m are covered by this test method. Very short fibers (including whiskers) call for specialized test techniques ( 1 ) 3 and are not covered by this test method. This test method may also be useful in the initial screening of candidate fibers for applications in polymer, metal, or ceramic matrix composites, and for quality control purposes. Because of their nature, ceramic fibers do not have a unique tensile strength, but rather a distribution of tensile strengths. In most cases when the tensile strength of the fibers is controlled by one population of flaws, the distribution of fiber tensile strengths can be described using a two-parameter Weibull distribution, although other distributions have also been suggested ( 2 , 3 ) . This test method constitutes a methodology to obtain the tensile strength of a single fiber. For the purpose of determining the parameters of the distribution of fiber tensile strengths, it is recommended to follow this test method in conjunction with Practice C1239 .