1.1 本试验方法测定高模量纤维增强聚合物基复合材料的面内压缩性能。复合材料形式限于连续纤维或不连续纤维增强复合材料，其弹性特性相对于测试方向是特别正交各向异性的。该测试程序通过楔形夹持界面处的剪切将压缩力引入试样。这种类型的力传递不同于试验方法中的程序 D695 当压缩力通过端部加载传递到试样中时，试验方法 D6641/D6641M 其中压缩力通过剪切和端部加载的组合传递，以及试验方法 D5467/D5467M 其中压缩力是通过使具有薄蒙皮的蜂窝芯夹层梁经受四-点弯曲。 1.2 该测试方法适用于由单向胶带、湿丝束放置、纺织品（例如织物）、短纤维或类似产品形式制成的复合材料。某些产品形式可能需要偏离测试方法。 1.3 以SI单位或英寸-磅单位表示的值应单独视为标准值。在正文中，英寸-磅单位显示在括号中。每个系统中陈述的值并不完全等同；因此，每个系统必须独立使用。合并两个系统的值可能导致不符合标准。 附注1: 测定树脂基复合材料压缩性能的附加程序可以在测试方法中找到 D695 , D5467/D5467M ，和 D6641/D6641M . 1.4 本标准并不旨在解决与其使用相关的所有安全性问题（如果有）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践并确定法规限制的适用性。 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》中确立的国际公认的标准化原则制定的。 ======意义和用途====== 5.1 该测试方法旨在为材料规格、研究和开发、质量保证以及结构设计和分析产生压缩性能数据。影响压缩响应并因此应报告的因素包括以下因素:材料、材料制备和铺层的方法、样品堆叠顺序、样品制备、样品调节、测试环境、样品对准和夹持、测试速度、温度下的时间、空隙含量和体积百分比增强。在测试方向上，可从该测试方法获得的特性包括: 5.1.1 极限抗压强度， 5.1.2 极限压缩应变， 5.1.3 压缩（线性或弦）弹性模量， 5.1.4 压缩泊松比，以及 5.1.5 过渡应变。

1.1 This test method determines the in-plane compressive properties of polymer matrix composite materials reinforced by high-modulus fibers. The composite material forms are limited to continuous-fiber or discontinuous-fiber reinforced composites for which the elastic properties are specially orthotropic with respect to the test direction. This test procedure introduces the compressive force into the specimen through shear at wedge grip interfaces. This type of force transfer differs from the procedure in Test Method D695 where compressive force is transmitted into the specimen by end-loading, Test Method D6641/D6641M where compressive force is transmitted by combined shear and end loading, and Test Method D5467/D5467M where compressive force is transmitted by subjecting a honeycomb core sandwich beam with thin skins to four-point bending. 1.2 This test method is applicable to composites made from unidirectional tape, wet-tow placement, textile (for example, fabric), short fibers, or similar product forms. Some product forms may require deviations from the test method. 1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text the inch-pounds units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the standard. Note 1: Additional procedures for determining compressive properties of resin-matrix composites may be found in Test Methods D695 , D5467/D5467M , and D6641/D6641M . 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 This test method is designed to produce compressive property data for material specifications, research and development, quality assurance, and structural design and analysis. Factors that influence the compressive response and should therefore be reported include the following: material, methods of material preparation and layup, specimen stacking sequence, specimen preparation, specimen conditioning, environment of testing, specimen alignment and gripping, speed of testing, time at temperature, void content, and volume percent reinforcement. Properties, in the test direction, that may be obtained from this test method include: 5.1.1 Ultimate compressive strength, 5.1.2 Ultimate compressive strain, 5.1.3 Compressive (linear or chord) modulus of elasticity, 5.1.4 Poisson's ratio in compression, and 5.1.5 Transition strain.