1.1 本试验方法包括在与空气、与某些溶液平衡的空气、水、水溶液或不同温度下的其他环境接触时评估粘合搭接剪切接头耐久性的数据。 1.2 本标准并不旨在解决与其使用相关的所有安全问题（如有）。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，并确定监管限制的适用性。 具体的预防说明见 7.4 . 1.3 以SI单位表示的值被视为标准值。括号中的值仅供参考。 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《国际标准、指南和建议制定原则决定》中确立的国际公认标准化原则制定的。 =====意义和用途====== 4.1 应力和水分的结合降低了大多数粘接接头的耐久性。水或水蒸气存在时的应力可能会导致某些粘合剂接头在破坏干接头所需应力的一小部分时失效。给定粘合剂接头的失效时间通常随着应力、温度和相对湿度的增加而减少。 4.2 该试验方法可用作评估粘合接头耐久性的加速筛选试验。它可用于测量暴露在室外或使用中的粘合剂接头所经历的环境条件下的粘合剂接头的耐久性。该试验也可用于确定各种表面处理或基材对粘接接头耐久性的影响。 4.3 通过使用该测试方法，可以在均匀的条件下比较各种粘合剂的耐久性能。为了评估给定粘合剂的整体耐久性，应在应力、相对湿度和温度范围内测试搭接剪切接头。对于特定的最终用途，可以仅使用一组测试条件获得所需的耐久性数据。

1.1 This test method covers data for assessing the durability of adhesive lap-shear joints while stressed in contact with air, air in equilibrium with certain solutions, water, aqueous solutions, or other environments at various temperatures. 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. Specific precautionary statements are given in 7.4 . 1.3 The values stated in SI units are considered to be the standard. The values in parentheses are for information only. 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 ====== 4.1 The combination of stress and moisture decreases the durability of most adhesive joints. Stresses in the presence of water or water vapor may cause some adhesive joints to fail at some small fraction of the stress required to break the dry joint. The time to failure for a given adhesive joint generally decreases with increasing stress, temperature, and relative humidity. 4.2 This test method may be used as an accelerated screening test for assessing the durability of adhesive joints. It may be used to measure durability of adhesive joints exposed outdoors or to environmental conditions experienced by adhesive joints in service. The tests may also be used to determine the effects of various surface preparations or substrates on durabilities of adhesive joints. 4.3 The durability performance of various adhesives may be compared by using this test method under uniform sets of conditions. To assess the overall durability of a given adhesive, lap-shear joints should be tested under a range of stress, relative humidity, and temperature. For a specific end use it may be possible to obtain the needed durability data using only one set of test conditions.