1.1 本试验方法确定了剪切屈服强度 F s y 和抗剪极限强度 F s u 对聚碳酸酯中的熔合键线施加扭转剪切载荷。 1.2 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。 1.3 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 在本文中，厚度大于0的航空航天级挤压透明聚碳酸酯材料不可用。 5英寸。（12.7毫米）。当厚度大于0.5英寸的板材有要求时。（12.7 mm），将两个或多个板材熔合在一起，形成所需厚度的单个板材。 5.2 完整透明度的结构完整性取决于熔合键的完整性。本试验应用扭转剪切载荷来测量熔合粘结的结构完整性。该试验方法被认为比拉伸或压缩剪切试验更可靠和更可重复。

1.1 This test method determines the shear yield strength F s y and shear ultimate strength F s u of fusion bonds in polycarbonate by applying torsional shear loads to the fusion-bond line. 1.2 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. 1.3 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 At this writing, aerospace quality extruded transparent polycarbonate material is not available in thicknesses greater than 0.5 in. (12.7 mm). When a requirement exists for sheets thicker than 0.5 in. (12.7 mm), two or more sheets are fusion bonded together to form a single sheet of the desired thickness. 5.2 The structural integrity of the completed transparency depends on the integrity of the fusion bond. This test applies torsional shear loads to measure the structural integrity of the fusion bond. This test method is considered more reliable and more reproducible than shear tests in tension or compression.