Aircraft full-scale fatigue tests are expensive and time-consuming to conduct but are a critical item on the certification path of any aircraft design or modification. This paper outlines a proposal that trades cycling hours for increased detail in the teardown of a metallic test article. A method for determining the equivalent demonstrated crack size (and crack growth curve) at the mandated test life utilising the lead crack framework is demonstrated. It is considered that the test duration can be significantly reduced, whilst still achieving all the desired outcomes of a certification program.

中文翻译：

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使用铅裂纹框架减少耐久性测试时间

飞机全面疲劳测试的执行成本高昂且耗时，但却是任何飞机设计或改装认证路径上的关键项目。本文概述了一项提议，该提议以循环时间换取金属测试物品拆卸中的更多细节。演示了一种利用铅裂纹框架在规定的测试寿命下确定等效演示裂纹尺寸（和裂纹扩展曲线）的方法。人们认为可以显着缩短测试持续时间，同时仍能实现认证计划的所有预期结果。