1.1 本试验方法包括测定纤维增强塑料棒的表观水平剪切强度。试样是一个短梁，其形式为拉挤杆的长度。本试验方法适用于所有类型的平行纤维增强塑料棒样品。 1.2 本试验方法主要用于质量控制和规范目的（参见 5.1 ). 1.3 以国际单位制表示的数值应视为标准值。 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。 注1: 没有已知的ISO等效于本标准。 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====== 5.1 通过本试验方法确定的表观剪切强度有助于质量控制和规范目的。它也适用于与层间剪切强度有关的研究和开发项目。通过本试验方法获得的表观抗剪强度并非用于设计目的，但如果所有失效均为水平剪切，则允许将其用于复合材料的比较试验。 5.2 建议在每个研究测试系列中制作对照样品，并注意将每组对照与在不同时间运行的相应测试系列进行比较。

1.1 This test method covers the determination of the apparent horizontal shear strength of fiber reinforced plastic rods. The specimen is a short beam in the form of lengths of pultruded rods. This test method is applicable to all types of parallel-fiber-reinforced plastic rod samples. 1.2 This test method is primarily used for quality control and specification purposes (see 5.1 ). 1.3 The values stated in SI units are to be regarded as standard. 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. Note 1: There is no known ISO equivalent to this standard. 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 Apparent shear strength determined by this test method is useful for quality control and specification purposes. It is also applicable to research and development programs concerned with interlaminar-shear strength. The apparent shear strength obtained by this test method is not intended for design purposes, but allowed to be utilized for comparative testing of composite materials, if all failures are in horizontal shear. 5.2 It is recommended that control samples be fabricated with each research test series and that care be used to compare each set of controls with corresponding test series run at different times.