1.1 本试验方法涵盖了夹层梁结构中由高模量纤维增强的聚合物基复合材料的平面内压缩性能。复合材料形式仅限于单向取向的连续纤维复合材料。本试验程序将压缩载荷引入与厚蜂窝芯结合的薄皮中，压缩载荷通过梁的四点弯曲传递到样品中。 1.2 本程序主要适用于由预浸料或类似产品形式制成的层压板。其他产品形式可能需要偏离试验方法。 1.3 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。 1.3.1 在文本中，英寸-磅单位显示在括号中。 注1: 测定聚合物基复合材料压缩性能的其他程序可在试验方法中找到 D3410/D3410M 和 D695 . 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和健康实践，并确定监管限制的适用性。 ====意义和用途====== 5.1 本试验方法旨在产生膜压缩性能数据，用于材料规范、研发、质量保证以及结构设计和分析。因此，应报告影响压缩响应的因素包括: 材料、材料和试样制备方法、试样调节、试验环境、试样对齐、试验速度、加固时间。在试验方向上，可从本试验方法中获得的特性包括: 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，以及 5.1.4 过渡应变。

1.1 This test method covers the in-plane compressive properties of polymer matrix composite materials reinforced by high-modulus fibers in a sandwich beam configuration. The composite material forms are limited to continuous-fiber composites of unidirectional orientation. This test procedure introduces compressive load into a thin skin bonded to a thick honeycomb core with the compressive load transmitted into the sample by subjecting the beam to four-point bending. 1.2 This procedure is applicable primarily to laminates made from prepreg or similar product forms. Other 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. 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. 1.3.1 Within the text the inch-pound units are shown in brackets. Note 1: Additional procedures for determining compressive properties of polymer matrix composites may be found in Test Methods D3410/D3410M and D695 . 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 and health practices and determine the applicability of regulatory limitations prior to use. ====== Significance And Use ====== 5.1 This test method is designed to produce membrane 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 and specimen preparation, specimen conditioning, environment of testing, specimen alignment, speed of testing, time at 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, and 5.1.4 Transition strain.