本航空航天信息报告（AIR）建立了挠曲试验程序，以确定可重新连接或永久性液压管接头的疲劳强度，并对其进行分类。本程序旨在对液压管材料（如AMS 5561钢、AMS 4944钛和MIL-T-7081铝合金）的配件和接头进行弯曲试验，这些材料安装为自由谐振梁。特别的优点是测试设置的固有简单性、测试夹具的最小约束、低功率要求、短测试持续时间以及易于改变应力水平。

This Aerospace Information Report (AIR) establishes flexure test procedures to determine and classify the fatigue strengths of reconnectable or permanent hydraulic tube joints. The procedure is intended for conducting flexure tests of fittings and joints for hydraulic tubing materials such as AMS 5561 steel, AMS 4944 titanium and MIL-T-7081 aluminum alloy, mounted as free-free resonant beams. Of particular advantage are the inherent simplicity of test setup, minimum restraint from a test fixture, low power requirements, short test duration and ease of varying stress level.