fatigue test

fatigue test

[fə′tēg ‚test]
(engineering)
Test to determine the range of alternating stress which a material can withstand without breaking.
References in periodicals archive ?
description of the equipment "universal hydraulic ripper; loading pull-push ": servohydraulic test equipment with the power capacity of at least A 250 kn, and a stroke of 100 mm for fatigue test samples of circular or quadrilateral cross-section, loaded with stress (pressure-tension) with the possibility of testing in the temperature range from -80 A c to to at least 800 A c.
The most useful fatigue test data, whether measured on standard material test or by product testing, is multi-point S-N data, as this can be used to construct long term predictions of behavior; whereas fatigue testing, where samples either pass or fail at a specified number of cycles, can only be used for the most basic screening or qualification.
This time, however, Airbus has not so far been able to duplicate the fatigue test results on any aircraft in service.
As a result, fatigue test specimen geometry, manufacturing, and loading were found to vary significantly between the studies in the literature.
Some recent developments are shared in these 22 papers, among them rolling contact fatigue strength testing and material developments in aerospace bearings, testing the service life of components with defects in the rolling contact fatigue zone, rotating beam testing of bearing steels as an effective complement to a rolling contact fatigue test, improvement in the efficiency of ultrasonic tests for evaluating macroscopic inclusions, material response bearing testing under vibration loading, and the influence of fiber flow on rolling contact fatigue life.
Video of the fatigue test can be found at http://bit.
Using open literature and in-house fatigue test data, the fatigue life curves of resistance spot-welds for several steels in the lap-shear geometry were compared and normalized.
A standard uniaxial fatigue test protocol is proposed by simplifying the experimental approach used in developing the constitutive model.
If you perform the fatigue test without rest periods, the asphalt fails in, say, 5,000 cycles," Little says.
A crack can be imaged many times with a gel electrode, so onset and growth of fatigue cracks can be monitored by periodic in situ inspection during a fatigue test," Dr Baxter notes.
The strain-life data is generally acquired when the strain amplitude is the controlled variable during an axial fatigue test.