High-temperature multi-axis vibration fatigue test method

Abstract

The invention provides a high-temperature multi-axis vibration fatigue test method, and relates to the technical field of material high-temperature vibration fatigue performance testing. Test instruments needed by the method comprise a vibration controller, a power amplifier, two vibration exciters, two sliding block guide rails, a square platform, a test piece, a clamp, a high-frequency magneticinduction heating machine, an acceleration sensor, an infrared temperature detector and a paperless recorder. The test method comprises the following steps: inputting vibration parameters into the vibration controller, and controlling the two vibration exciters through the power amplifier; starting the high-frequency magnetic induction heating machine to heat a test piece; setting a test heating temperature, detecting the temperature of the test piece through the infrared temperature detector, and controlling whether the high-frequency magnetic induction heating machine heats or not in a closed-loop manner; ending testing according to the failure criterion or the preset time; and deriving test data. The method can be used for measuring the high-temperature multi-axis vibration fatigue performance of a material, the design cost is reduced, and the design level is improved.

Description

Technical field [0001] The invention belongs to the technical field of material vibration fatigue performance testing, and particularly relates to a high-temperature multiaxial vibration fatigue test method. Background technique [0002] The service environment of hypersonic critical space vehicles, aero engines, gas turbines and other equipment is extremely harsh. The important parts of the above equipment not only face the severe challenge of the ultra-high temperature environment, but also are affected by vibration excitation from different directions. Under the action of alternating service load and alternating service temperature, the fatigue life of the material will be greatly shortened. Moreover, fatigue failure is sudden, which often causes serious casualties and economic losses. [0003] At present, the research on high temperature vibration of materials is mostly focused on uniaxial, that is, the fatigue behavior of materials under high temperature and single direction...

AI Technical Summary

Problems solved by technology

Under the action of alternating service load and alternating service temperature, the fatigue life of the material will be greatly shortened

And fatigue failure is sudden, often causing serious casualties and economic losses

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