Rotating bending fatigue test device and method with axial load control function

A technology of bending fatigue and axial load, applied in the direction of testing material strength by applying stable bending force, testing material strength by applying stable tension/pressure, testing material strength by applying repetitive force/pulsation force, etc., can solve the problem that cannot be solved Apply average load and other issues to achieve the effect of simple structure, low manufacturing and use costs, and low energy consumption

Inactive Publication Date: 2013-01-09
INST OF MECHANICS - CHINESE ACAD OF SCI
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AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a device and method for a rotational bending fatigue test with axial load control in order to overcome the limitation that the average load cannot be applied in the existing rotational bending fatigue test technology

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  • Rotating bending fatigue test device and method with axial load control function
  • Rotating bending fatigue test device and method with axial load control function
  • Rotating bending fatigue test device and method with axial load control function

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Embodiment Construction

[0048] Hereinafter, the embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that, the embodiments in the present application and the features in the embodiments may be arbitrarily combined with each other if there is no conflict.

[0049] like figure 1The device shown, its basic structure is a four-point bending force structure. The device includes: a test sample 1 , two sample fixing shafts 2 , two tapered roller bearings 13 , two fixing sleeves 14 , and pivot points 3 , 4 , and 5 on the fixing sleeve 14 . The test sample 1 is fixed in the middle of the sample fixing shaft 2, and the test sample 1 and the sample fixing shaft 2 rotate around their own axes. The sample fixing shaft 2 is installed in the middle of the fixing sleeve 14 through the tapered roller bearing 13 . The fixed loading hinge point 3 and the axial loading hinge point 5 on the fixed sleeve 14 support the weight of the entire four...

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Abstract

The invention discloses a rotating bending fatigue test device and a rotating bending fatigue test method with an axial load control function. The device comprises a rotating bending fatigue loading device and an axial load application and control device for applying axial force to a test sample. The axial load application and control device is additionally arranged on the basis of the conventional rotating bending fatigue test device and the conventional rotating bending fatigue test method, and the sample is subjected to the action of an axial load under a rotating bending fatigue loading condition, so that rotating bending fatigue tests under different stress ratio conditions are realized. The axial load is controlled to be changed along with a time cycle, so that combined fatigue under the action of two different frequency loads is realized. Rotation is stopped, a bending load is removed, and the axial load is controlled to be monotonically increased, so that a monotonic tensile test is realized. The rotating bending fatigue test device with the axial load control function is simple in structure, low in energy consumption, low in manufacture and using cost and suitable for high-cycle and ultrahigh-cycle fatigue tests under an average tensile stress load condition.

Description

technical field [0001] The present invention relates to a device and method for performing fatigue experiments on material samples, in particular to a device and method for rotating bending fatigue experiments with axial load control. Background technique [0002] Fatigue refers to the accumulation of damage to a material or structure under alternating load cycles until it fails. Fatigue behavior is classified as low-cycle fatigue (cycles less than 10 5 ), high cycle fatigue (cycles at 10 5 to 10 7 between) and ultra-high cycle fatigue (cycles between 10 7 above). [0003] The existing fatigue testing equipment mainly includes hydraulic servo fatigue testing machine, high-frequency resonance fatigue testing machine and rotary bending fatigue testing machine. Among them, the rotary bending fatigue testing machine has simple structure, low energy consumption, low manufacturing and use costs, and is very suitable for high-cycle or ultra-high-cycle fatigue testing. [0004...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/20G01N3/08G01N3/32
Inventor 谢季佳李端义武晓雷姜萍刘元富
Owner INST OF MECHANICS - CHINESE ACAD OF SCI
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