1.1 该试验方法确定了由高模量纤维增强的聚合物基复合材料的平面内剪切响应。复合材料形式仅限于能够在层压板中进行拉伸测试的连续纤维增强复合材料±45°层压板 x 方向 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不是精确的等价物；因此，每个系统必须相互独立使用。将两个系统的值合并可能会导致不符合标准。 1.2.1 在文本中，英寸-磅单位显示在括号中。 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。 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 本试验方法旨在产生平面内剪切性能数据，用于材料规范、研发、质量保证以及结构设计和分析。因此，应报告影响剪切响应的因素包括:材料、材料制备和铺层方法、试样堆叠顺序和总厚度、试样制备、试样调节、测试环境、试样对齐和夹持、测试速度、温度时间、空隙率和体积加筋率。 可从本试验方法中获得的特性包括: 5.1.1 平面内剪应力与剪应变响应， 5.1.2 平面内剪切弦弹性模量， 5.1.3 偏移剪切特性， 5.1.4 ±45°层压板的最大面内剪切应力，以及 5.1.5 ±45°层压板的最大面内工程剪切应变。

1.1 This test method determines the in-plane shear response of polymer matrix composite materials reinforced by high-modulus fibers. The composite material form is limited to a continuous-fiber-reinforced composite ±45° laminate capable of being tension tested in the laminate x direction. 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 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. 1.2.1 Within the text, the inch-pound units are shown in brackets. 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. 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 This test method is designed to produce in-plane shear property data for material specifications, research and development, quality assurance, and structural design and analysis. Factors that influence the shear response and should therefore be reported include the following: material, methods of material preparation and lay-up, specimen stacking sequence and overall thickness, specimen preparation, specimen conditioning, environment of testing, specimen alignment and gripping, speed of testing, time at temperature, void content, and volume percent reinforcement. Properties that may be derived from this test method include the following: 5.1.1 In-plane shear stress versus shear strain response, 5.1.2 In-plane shear chord modulus of elasticity, 5.1.3 Offset shear properties, 5.1.4 Maximum in-plane shear stress for a ±45° laminate, and 5.1.5 Maximum in-plane engineering shear strain for a ±45° laminate.