1.1 这些试验方法包括在恒定力和温度条件下测定缺口试样的断裂时间。这些测试方法还包括对测试设备的基本要求。 1.2 以英寸-磅单位表示的值应被视为标准值。括号内的单位仅供参考。 1.3 本标准并不旨在解决与其使用相关的所有安全问题（如果有的话）。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。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 =====意义和用途====== 4.1 缺口试样的断裂寿命表明了材料在多轴应力条件下局部变形而不开裂的能力，从而在应力集中器周围重新分布应力。 4.2 断裂缺口拉伸试验的时间主要用作定性工具，用于比较材料对包含故意或意外应力集中的设计的适用性。

1.1 These test methods cover the determination of the time for rupture of notched specimens under conditions of constant force and temperature. These test methods also includes the essential requirements for testing equipment. 1.2 The values stated in inch-pound units are to be regarded as the standard. The units in parentheses are for information only. 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 ====== 4.1 Rupture life of notched specimens is an indication of the ability of a material to deform locally without cracking under multi-axial stress conditions, thereby redistributing stresses around a stress concentrator. 4.2 The time-for-rupture notch tension test is used principally as a qualitative tool in comparing the suitability of materials for designs that will contain deliberate or accidental stress concentrators.