Axial fatigue experimental approach and apparatus for stacking abrasion load

Abstract

The invention discloses an axial fatigue test method with abrasion load superposition and a device thereof. The method is to impose the abrasion load on the specimen when an axial fatigue test machine carries out the axial fatigue experiment on the specimen; and the abrasion load is imposed through an abrasion load device sleeved on the specimen. The device comprises the axial fatigue test machine and the abrasion load device; the abrasion load device comprises a speed reducer; the input shaft of the speed reducer is connected with an adjustable speed motor; the output shaft of the speed reducer is a cylindrical structure; adjusting screws are symmetrically arranged at both sides of the output shaft of the speed reducer; and a friction plate is arranged inside the output shaft of the speed reducer. The invention enables the experimental results in the laboratory to truly reflect the actual service life of the component under various load effects and overcomes the one-sidedness of the existing experimental results. The invention helps finding out the fatigue fracture reasons and fatigue life prediction under the combined effect of simultaneous abrasion load and fatigue load bearing.

Description

technical field [0001] The invention relates to an experiment method and device, in particular to an axial fatigue experiment method and device for superimposed wear load. Background technique [0002] At present, fatigue tests mainly include bending fatigue and axial fatigue tests, and components are often subjected to various loads during actual use, such as corrosion, temperature, wear, extrusion and other loads and fatigue loads, resulting in fatigue life and fatigue strength changed significantly. The fatigue test in the laboratory is generally a single fatigue test, such as a separate axial fatigue test, or a separate friction load test, which has a certain one-sidedness, and it is difficult to apply multiple loads on the specimen at the same time. Fatigue test and friction load experiment, so the life predicted by the laboratory fatigue test is quite different from the actual service life of the component. The predicted life of the experiment does not match the actu...

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Problems solved by technology

[0002] At present, fatigue tests mainly include bending fatigue and axial fatigue tests, and components are often subjected to various loads during actual use, such as corrosion, temperature, wear, extrusion and other loads and fatigue loads, resulting in fatigue life Significant changes in fatigue strength

The fatigue test in the laboratory is generally a single fatigue test, such as a separate axial fatigue test, or a separate friction load test, which has a certain one-sidedness, and it is difficult to apply multiple loads on the specimen at the same time. Fatigue test and friction load experiment, so the life predicted by the laboratory fatigue test is quite different from the actual service life of the component

The life predicted by the experiment does not match the actual service life

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