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

A bending fatigue and axial load technology, applied in the direction of using a stable bending force to test the material strength, using a stable tension/pressure test to test the material strength, using a repetitive force/pulse force to test the material strength, etc. Applying average load and other issues to achieve the effect of simple structure, low manufacturing and use costs, and low energy consumption

Inactive Publication Date: 2015-07-22
INST OF MECHANICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

[0043] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0044] like figure 1 As shown in the device, its basic structure is a four-point bending force-bearing structure. The device includes: a test sample 1, two sample fixed shafts 2, two tapered roller bearings 13, two fixed sleeves 14, and hinge fulcrums 3, 4, 5 on the fixed 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 a tapered roller bearing 13 . The fixed loading hinge fulcrum 3 and the axial loading hinge fulcrum 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 invention relates to a device and method for carrying out 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 phenomenon that the damage of a material or structure accumulates until it is destroyed under the action of alternating load cycles. Fatigue behavior is divided into low-cycle fatigue (less than 10 cycles) according to the number of load cycles required for fatigue failure to occur. 5 ), high-cycle fatigue (cycles in 10 5 to 10 7 between) and ultra-high cycle fatigue (cycles between 10 7 above). [0003] 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 manuf...

Claims

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Application Information

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Patent Type & Authority Patents(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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