本SAE推荐规程（ARP）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（21Cr-6Ni-9Mn）钢或AMS 4944（3AL-2.5V）钛）的配件和接头进行弯曲试验。 通过在试样中保持系统压力并在旋转或平面弯曲试验机中弯曲，施加平均应力。

This SAE Recommended Practice (ARP) 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 (21Cr-6Ni-9Mn) steel or AMS 4944 (3AL-2.5V) titanium. A mean stress is applied by holding system pressure in the specimens and flexing in a rotary or planar bending test machine.