1.1 本试验方法包括测定跨厚度抗拉强度 在室温下连续纤维增强陶瓷（CFCC）的单调单轴拉伸载荷下。本试验方法涉及但不限于各种建议的试样几何形状、试验夹具、数据收集和报告程序。通常，通过将适当的五金件粘接到样品上并进行测试，在垂直于厚度的方向上对圆形或方形试样进行拉伸测试。对于笛卡尔坐标系 x -轴和 y -轴位于试样平面内。横向厚度方向垂直于平面，标记为 z -本试验方法的坐标轴。对于CFCC，试样平面通常包含三个尺寸中较大的一个，并且平行于单向、双向和机织复合材料的纤维层。注意，本试验方法中使用的跨厚度抗拉强度是指在单调单轴拉伸载荷下获得的抗拉强度，其中“单调”是指从试验开始到最终断裂没有反转的连续不间断试验速率。 1.2 本试验方法主要用于所有具有连续纤维增强的高级陶瓷基复合材料:单向（1D）、双向（2D）、编织和三维（3D）。此外，该试验方法也可用于具有1D、2D和3D连续纤维增强的玻璃（非晶）基复合材料。本试验方法不直接涉及不连续纤维增强、晶须增强或颗粒增强陶瓷，尽管此处详述的试验方法可能同样适用于这些复合材料。应注意的是，在“光纤”中具有高体积分数的3D架构 z “方向可能很难成功测试。 1.3 数值符合国际单位制（SI）和 IEEE/ASTM SI 10 . 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。 其他建议见 6.7 和截面 7. . 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====== 4.1 该试验方法可用于材料开发、材料比较、质量保证、表征和设计数据生成。 4.2 连续纤维增强陶瓷基复合材料通常由玻璃或细晶粒（小于50 μm）陶瓷基体和陶瓷纤维增强体。氟氯化碳是高温结构应用的候选材料，要求具有高度的耐腐蚀和抗氧化性、耐磨性和侵蚀性，以及固有的损伤容限，即韧性。 此外，连续纤维增强玻璃（非晶）基复合材料是类似但要求可能较低的应用的候选材料。虽然剪切试验方法用于评估剪切层间强度（τ ZX公司 , τ ZY公司 )在高级陶瓷中，试样加工和测试有很大的困难。制备不当的缺口可能会在剪切试样中产生不均匀的应力分布，并可能导致强度结果的解释不明确。此外，这些剪切试样也很少产生处于纯剪切状态的标准截面。单轴受力跨厚度拉伸强度试验测量拉伸层间强度 避免上述复杂情况，并提供均匀应力材料的机械行为和强度信息。测得的极限强度值不是对基体强度的直接测量，而是基体强度和纤维、纤维/基体界面和基体之间结合水平的组合。 4.3 在跨厚度拉伸试验（TTT）中测试的CFCC可能因单个主要缺陷或累积损伤过程而失败；因此，单轴受力TTT承受均匀拉伸应力的材料体积可能是确定CFCC极限强度的一个重要因素。CFCC脆性基体强度分布的概率性质要求在每个试验条件下有足够数量的试样进行统计分析和设计，并在本试验方法中提供试样尺寸和足够数量的指南。确定试样体积对CFCC强度分布的确切影响的研究尚未完成。应注意的是，使用不同体积和面积的其他推荐试样获得的强度可能因体积差异而不同。 4.4 从特定材料或零件的选定部分或两者制造成标准尺寸的试样的TTT结果可能不能完全代表整个零件的强度和变形特性- 确定最终产品或其在不同环境中的使用行为。 4.5 出于质量控制目的，从标准TTT试样得出的结果可被视为指示在给定的主要加工条件和加工后热处理中所取材料的响应。 4.6 CFCC的强度取决于其固有的抗断裂能力、缺陷的存在、损伤累积过程或其组合。强烈建议对断裂面和断口进行分析，尽管这超出了本试验方法的范围。

1.1 This test method covers the determination of transthickness tensile strength under monotonic uniaxial tensile loading of continuous fiber-reinforced ceramics (CFCC) at ambient temperature. This test method addresses, but is not restricted to, various suggested test specimen geometries, test fixtures, data collection, and reporting procedures. In general, round or square test specimens are tensile tested in the direction normal to the thickness by bonding appropriate hardware to the samples and performing the test. For a Cartesian coordinate system, the x -axis and the y -axis are in the plane of the test specimen. The transthickness direction is normal to the plane and is labeled the z -axis for this test method. For CFCCs, the plane of the test specimen normally contains the larger of the three dimensions and is parallel to the fiber layers for unidirectional, bidirectional, and woven composites. Note that transthickness tensile strength as used in this test method refers to the tensile strength obtained under monotonic uniaxial tensile loading, where “monotonic” refers to a continuous nonstop test rate with no reversals from test initiation to final fracture. 1.2 This test method is intended primarily for use with all advanced ceramic matrix composites with continuous fiber reinforcement: unidirectional (1D), bidirectional (2D), woven, and tridirectional (3D). In addition, this test method also may be used with glass (amorphous) matrix composites with 1D, 2D, and 3D continuous fiber reinforcement. This test method does not directly address discontinuous fiber-reinforced, whisker-reinforced, or particulate-reinforced ceramics, although the test methods detailed here may be equally applicable to these composites. It should be noted that 3D architectures with a high volume fraction of fibers in the “ z ” direction may be difficult to test successfully. 1.3 Values are in accordance with the International System of Units (SI) and IEEE/ASTM SI 10 . 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. Additional recommendations are provided in 6.7 and Section 7 . 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 ====== 4.1 This test method may be used for material development, material comparison, quality assurance, characterization, and design data generation. 4.2 Continuous fiber-reinforced ceramic matrix composites generally are characterized by glass or fine grain-sized (<50 μm) ceramic matrices and ceramic fiber reinforcements. CFCCs are candidate materials for high-temperature structural applications requiring high degrees of corrosion and oxidation resistance, wear and erosion resistance, and inherent damage tolerance, that is, toughness. In addition, continuous fiber-reinforced glass (amorphous) matrix composites are candidate materials for similar but possibly less demanding applications. Although shear test methods are used to evaluate shear interlaminar strength (τ ZX , τ ZY ) in advanced ceramics, there is significant difficulty in test specimen machining and testing. Improperly prepared notches can produce nonuniform stress distribution in the shear test specimens and can lead to ambiguity of interpretation of strength results. In addition, these shear test specimens also rarely produce a gage section that is in a state of pure shear. Uniaxially forced transthickness tensile strength tests measure the tensile interlaminar strength avoid the complications listed above, and provide information on mechanical behavior and strength for a uniformly stressed material. The ultimate strength value measured is not a direct measure of the matrix strength, but a combination of the strength of the matrix and the level of bonding between the fiber, fiber/matrix interphase, and the matrix. 4.3 CFCCs tested in a transthickness tensile test (TTT) may fail from a single dominant flaw or from a cumulative damage process; therefore, the volume of material subjected to a uniform tensile stress for a single uniaxially forced TTT may be a significant factor in determining the ultimate strength of CFCCs. The probabilistic nature of the strength distributions of the brittle matrices of CFCCs requires a sufficient number of test specimens at each testing condition for statistical analysis and design, with guidelines for test specimen size and sufficient numbers provided in this test method. Studies to determine the exact influence of test specimen volume on strength distributions for CFCCs have not been completed. It should be noted that strengths obtained using other recommended test specimens with different volumes and areas may vary due to these volume differences. 4.4 The results of TTTs of test specimens fabricated to standardized dimensions from a particular material, or selected portions of a part, or both, may not totally represent the strength and deformation properties of the entire full-size end product or its in-service behavior in different environments. 4.5 For quality control purposes, results derived from standardized TTT specimens may be considered indicative of the response of the material from which they were taken for given primary processing conditions and post-processing heat treatments. 4.6 The strength of CFCCs is dependent on their inherent resistance to fracture, the presence of flaws, damage accumulation processes, or a combination thereof. Analysis of fracture surfaces and fractography, though beyond the scope of this test method, is highly recommended.