1.1 这些测试方法涵盖了芳纶纱线、由此类纱线缠绕而成的帘线以及由此类帘线编织的织物的拉伸测试。纱线或绳索可以缠绕在锥形、管状、筒管、线轴或梁上；可编织成织物；或者可能是其他形式。这些方法仅包括测试程序，不包括规范或公差。 1.2 以国际单位制或英寸-磅单位表示的数值应单独视为标准值。每个系统中规定的值可能不是精确的等效值；因此，每个系统应相互独立使用。将两个系统的值合并可能会导致不符合标准。 1.3 本标准包括以下试验方法: 部分 破断力 11 断裂韧性 12 断裂韧性 17 断裂伸长率 13 规定伸长率下的力（FASE） 14 线密度 10 模数 15 断裂应力 12 从工作到休息 16 1.4 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。 1.5 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 测试芳纶纱线和帘线时获得的拉伸性能水平取决于试样的年龄和历史以及测试期间使用的特定条件。 这些条件包括拉伸速率、夹具类型、试样标距、大气温度和湿度、穿过试样的气流速率以及试样的温度和含水量。因此，精确规定了测试条件，以获得特定样品的可再现测试结果。 5.2 因为增强产品的受力能力与用作增强材料的纱线或绳索的强度有关， 破断力 在设计各种类型的织物增强产品时，用于工程计算。当需要比较不同尺寸或不同类型纤维的纱线或帘线的固有强度特性时，断裂韧性非常有用，因为对于给定类型的纤维，断裂力与线密度近似成比例。 5.3 伸长率 在加固产品的设计和工程中，考虑到纱线或帘线的变形，因为它影响成品的均匀性及其在使用过程中的尺寸稳定性。 5.4 这个 法斯 用于监测纺织材料在加工和将纱线或帘线并入产品的各个阶段的特性变化。 5.5 模数 是当施加力时，纱线或帘线对延伸的阻力的度量。它有助于估计织物增强结构对施加不同力和拉伸速率的响应。虽然可以在任何指定力下确定模量，但初始模量是最常用的值。 5.6 从工作到休息 取决于力与伸长率的关系。它是衡量纺织结构吸收机械能的能力。 断裂韧性 是单位质量的断裂功。 5.7 应该强调的是，尽管上述参数与织物增强产品的性能有关，但产品的实际配置非常重要。形状、尺寸和内部结构也会对产品性能产生显著影响。因此，仅从增强材料的角度来评估纺织增强产品的性能是不可能的。 5.8 如果两个实验室（或更多实验室）的报告测试结果之间存在实际意义上的差异，则应进行比较测试，以确定它们之间是否存在统计偏差，并使用适当的统计协助。至少，应使用尽可能均匀的测试样品，从获得不同测试结果的材料中提取，并以相同数量随机分配给每个实验室进行测试。 具有既定测试值的其他材料可用于此目的。应使用未配对数据的统计测试，在测试系列之前选择的概率水平上，比较两个实验室的测试结果。如果发现偏差，必须找到并纠正其原因，或者考虑到已知偏差，调整未来的测试结果。

1.1 These test methods cover the tensile testing of aramid yarns, cords twisted from such yarns, and fabrics woven from such cords. The yarn or cord may be wound on cones, tubes, bobbins, spools, or beams; may be woven into fabric; or may be in some other form. The methods include testing procedure only and include no specifications or tolerances. 1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. 1.3 This standard includes the following test methods: Section Breaking Force 11 Breaking Tenacity 12 Breaking Toughness 17 Elongation at Break 13 Force at Specified Elongation (FASE) 14 Linear Density 10 Modulus 15 Stress at Break 12 Work-to-Break 16 1.4 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. 1.5 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 The levels of tensile properties obtained when testing aramid yarns and cords are dependent on the age and history of the specimen and on the specific conditions used during the test. Among these conditions are rate of stretching, type of clamps, gauge length of specimen, temperature and humidity of the atmosphere, rate of airflow across the specimen, and temperature and moisture content of the specimen. Testing conditions accordingly are specified precisely to obtain reproducible test results on a specific sample. 5.2 Because the force-bearing ability of a reinforced product is related to the strength of the yarn or cord used as a reinforcing material, breaking force is used in engineering calculations when designing various types of textile reinforced products. When needed to compare intrinsic strength characteristics of yarns or cords of different sizes or different types of fiber, breaking tenacity is very useful because, for a given type of fiber, breaking force is approximately proportional to linear density. 5.3 Elongation of yarn or cord is taken into consideration in the design and engineering of reinforced products because of its effect on uniformity of the finished product and its dimensional stability during service. 5.4 The FASE is used to monitor changes in characteristics of the textile material during the various stages involved in the processing and incorporation of yarn or cord into a product. 5.5 Modulus is a measure of the resistance of yarn or cord to extension as a force is applied. It is useful for estimating the response of a textile reinforced structure to the application of varying forces and rates of stretching. Although modulus may be determined at any specified force, initial modulus is the value most commonly used. 5.6 Work-to-break is dependent on the relationship of force to elongation. It is a measure of the ability of a textile structure to absorb mechanical energy. Breaking toughness is work-to-break per unit mass. 5.7 It should be emphasized that, although the preceding parameters are related to the performance of a textile-reinforced product, the actual configuration of the product is significant. Shape, size, and internal construction also can have appreciable effect on product performance. It is not possible, therefore, to evaluate the performance of a textile reinforced product in terms of the reinforcing material alone. 5.8 If there are differences of practical significance between reported test results for two laboratories (or more), comparative tests should be performed to determine if there is a statistical bias between them, using competent statistical assistance. As a minimum, test samples should be used that are as homogeneous as possible, that are drawn from the material from which the disparate test results were obtained, and that are randomly assigned in equal numbers to each laboratory for testing. Other materials with established test values may be used for this purpose. The test results from the two laboratories should be compared using a statistical test for unpaired data, at a probability level chosen prior to the testing series. If a bias is found, either its cause must be found and corrected, or future test results must be adjusted in consideration of the known bias.