1.1 这些试验方法通过两种方法之一确定复合材料的成分含量。试验方法一通过八种程序中的一种，通过消化、点火或碳化物理去除基体，使钢筋基本不受影响，从而可以计算钢筋或基体含量（按重量或体积）以及空隙率。试验方法II仅适用于已知纤维面积重量的层压板材料，根据测得的层压板厚度计算补强或基质含量（按重量或体积）和固化层厚度。 试验方法II不适用于空隙体积的测量。 1.1.1 这些试验方法主要用于两部分复合材料系统。然而，可以制定特殊规定，将这些试验方法扩展到含有两种以上成分的填充材料系统，尽管并非所有试验结果都可以在每种情况下确定。 1.1.2 其中包含的程序被设计为对某些类别的聚合物或金属基质特别有效。第节讨论了建议的应用 4. ，以及在每个程序开始时。 1.1.3 试验方法一假设钢筋基本上不受消化或点火介质或碳化的影响。 包括钢筋微小变化的结果修正程序。程序A至F基于基体的化学去除，而程序G通过在炉中点燃基体来去除基体。程序H在炉中碳化基体。 1.1.4 试验方法二假设钢筋材料形式的纤维面积重量已知或控制在可接受的公差范围内。未测量空隙的存在。 等式15和 16 假设空隙率为零，进行计算。 1.2 单位- 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。 参见第节 9 了解更多信息。 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 必须知道复合材料的成分含量，以便对受钢筋或基体影响的复合材料的材料特性（机械、物理、热或电气）进行分析建模。此外，评估制造材料的质量和制造过程中使用的工艺需要了解成分含量。 5.2 复合材料的孔隙体积可能会显著影响其某些机械性能。较高的孔隙体积通常意味着较低的抗疲劳性、较高的水分渗透和风化敏感性，以及强度特性的变化或分散性增加。 需要了解复合材料的孔隙体积，作为复合材料质量的指标。 5.3 钢筋含量可用于归一化受试件中钢筋数量影响的机械性能。

1.1 These test methods determine the constituent content of composite materials by one of two approaches. Test Method I physically removes the matrix by digestion or ignition or carbonization by one of eight procedures, leaving the reinforcement essentially unaffected and thus allowing calculation of reinforcement or matrix content (by weight or volume) as well as percent void volume. Test Method II, applicable only to laminate materials of known fiber areal weight, calculates reinforcement or matrix content (by weight or volume), and the cured ply thickness, based on the measured thickness of the laminate. Test Method II is not applicable to the measurement of void volume. 1.1.1 These test methods are primarily intended for two-part composite material systems. However, special provisions can be made to extend these test methods to filled material systems with more than two constituents, though not all test results can be determined in every case. 1.1.2 The procedures contained within have been designed to be particularly effective for certain classes of polymer or metal matrices. The suggested applications are discussed in Section 4 , as well as at the start of each procedure. 1.1.3 Test Method I assumes that the reinforcement is essentially unaffected by the digestion or ignition medium or carbonization. A procedure for correction of the results for minor changes in the reinforcement is included. Procedures A through F are based on chemical removal of the matrix, while Procedure G removes the matrix by igniting the matrix in a furnace. Procedure H carbonizes the matrix in a furnace. 1.1.4 Test Method II assumes that the fiber areal weight of the reinforcement material form is known or controlled to an acceptable tolerance. The presence of voids is not measured. Eq 15 and 16 assume zero void content to perform the calculation. 1.2 Units— 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. See Section 9 for additional information. 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 A constituent content of a composite material must be known in order to analytically model the material properties (mechanical, physical, thermal, or electrical) of the composite which are affected by the reinforcement or matrix. Also, knowledge of the constituent content is required for evaluation of the quality of a fabricated material and the processes used during fabrication. 5.2 The void volume of a composite material may significantly affect some of its mechanical properties. Higher void volumes usually mean lower fatigue resistance, greater susceptibility to moisture penetration and weathering, and increased variation or scatter in strength properties. Knowledge of the void volume of a composite material is desirable as an indication of the quality of a composite. 5.3 Reinforcement content may be used to normalize mechanical properties affected by amount of reinforcement in the coupon.