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A torsional fretting fatigue test equipment and test method

A fretting fatigue and test equipment technology, applied in the direction of using repetitive force/pulsation force to test the strength of materials, instruments, measuring devices, etc., can solve the problems of poor test results, parameter bending, complicated operation, etc. The effect of good neutrality and simple loading device

Inactive Publication Date: 2018-11-13
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For the third method, the existing equipment is complicated to operate, the test results are poor, the sample is prone to parametric bending during the loading process, and it is difficult to measure the strain displacement change during the test

Method used

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  • A torsional fretting fatigue test equipment and test method
  • A torsional fretting fatigue test equipment and test method
  • A torsional fretting fatigue test equipment and test method

Examples

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Embodiment 1

[0028] Such as Figure 1 ~ Figure 2 As shown, it is an embodiment of the present invention, a torsional fretting fatigue test equipment, including a circular stress ring 3, a loading device symmetrically arranged on both sides of the circular stress ring 3, the same side of the loading device is provided with an analysis device, the loading device is provided with a clamping mechanism, the clamping mechanism includes a pressure sensor 5, and the pressure sensor 5 is electrically connected with a data acquisition system. There are threaded holes on both symmetrical sides of the circular stress ring 3, and the loading device includes a left loading screw 16 and a right loading screw 1 installed on the circular stress ring 3 through the threaded holes, and the left loading screw 16 and the right loading screw 1 respectively A left lock nut 15 and a right lock nut 2 are installed, and the holding mechanism includes a left support plate 14 and a right support plate 4, and there are...

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Abstract

The invention discloses a torsional fretting fatigue test device, which comprises a circular stress ring and a loading device symmetrically arranged on both sides of the circular stress ring, an analysis device is arranged on the same side of the loading device, and a clamping mechanism is arranged on the loading device , the clamping mechanism includes a pressure sensor, and the pressure sensor is electrically connected with a data acquisition system. The present invention also discloses a torsional fretting fatigue test method. , and then apply a set torsional load to the sample. During the test, during the relative motion between the sample and the fretting pad, the three-dimensional sensor measures the normal force and friction force in real time and sends them to the data acquisition and control system. The data acquisition and control system analyzes and obtains the variation of friction coefficient and fretting fatigue life of components under different working conditions. The loading device is simple and convenient to operate during the test, and the test effect is good, the result is reliable, and the repeatability is good.

Description

technical field [0001] The invention belongs to the technical field of torsional fretting fatigue test of wheel shaft interference fit, and in particular relates to a torsional fretting fatigue test equipment and a test method. Background technique [0002] Fretting fatigue refers to the relative displacement of extremely small amplitude (micron level) between the contact surfaces of two contacting workpieces due to alternating loads such as mechanical vibration, fatigue load, electromagnetic vibration or thermal cycle. High stress concentration and wear fatigue behavior. Fretting fatigue of components can greatly reduce the fatigue life of components. [0003] Fretting fatigue widely exists in fastening and fitting components in various industrial fields such as machinery industry, railway, nuclear power, aerospace, bridges, ships, etc. Its hazards are very serious and terrible, and it has become the main reason for the failure of many key components. Reasons, such as: ri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/26G01N3/32
CPCG01N3/26G01N3/32
Inventor 朱旻昊彭金方徐志彪刘建华蔡振兵莫继良周琰周俊波
Owner SOUTHWEST JIAOTONG UNIV
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