Patent ID: 6718833
Filing Date: 2004-04-13
Classification: G01N

Abstract:
A multiaxial high cycle fatigue test system for testing bending, torsion, and tension of a gas turbine fan blade, comprising the following subsystems:(1) a main test frame support, including an enclosed chamber with four side walls: (2) a main test frame support, including two I-beam pedestals reinforced by gussets; (3) an auxiliary test frame support, including a four-post die set; (4) servo-hydraulic components, including a hydraulic service manifold two high frequency actuators along a horizontal axis, and one large main actuator along a vertical axis; (5) a multiaxial digital control and data acquisition system, including a control console and a computer work station; wherein the large vertical actuator is used to apply a radial centrifugal force, and the two small horizontal actuators are used to apply vibratory loading; the two small side actuators being offset independently of each other, to enable the machine to apply both bending loads and torque to the blade; the blade being subjected to torsion loading when the traverse actuators move in phase, that is when both actuators move either in or out at the same time, and the blade being subjected to bending loading when the actuators move out-of-phase, that is one actuator moves in when the other moves out or vice-versa.