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High-temperature and high-low cycle composite fatigue test system

A fatigue test and high temperature technology, applied in the direction of using repetitive force/pulse force to test the strength of materials, measuring devices, instruments, etc., can solve the problem that the working environment of aero-engine engineering parts cannot be simulated, the fatigue characteristics of materials cannot be accurately reflected, and the fatigue characteristics of materials cannot be fully satisfied. Test requirements and other issues, to achieve the effect of low cost, simple and practical test system

Pending Publication Date: 2020-09-11
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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Problems solved by technology

Therefore, the high-cycle fatigue and low-cycle fatigue tests based on traditional single-item loading can no longer fully meet the test requirements of modern material fatigue performance, and it is urgent to carry out high-low cycle composite fatigue performance tests
[0003] At present, material fatigue tests are all based on traditional single-item loading high-frequency fatigue and low-cycle fatigue tests, which cannot simulate the actual working environment of some aeroengine engineering parts
Moreover, the high-frequency fatigue and low-cycle fatigue test data of traditional single-item loading cannot accurately reflect the material fatigue characteristics of engineering parts under multiaxial stress

Method used

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  • High-temperature and high-low cycle composite fatigue test system
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  • High-temperature and high-low cycle composite fatigue test system

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Embodiment Construction

[0028] The technical scheme of the present invention will be described in further detail below in conjunction with accompanying drawing and embodiment:

[0029] See attached Figure 2-5 As shown, this kind of high temperature, high and low cycle composite fatigue test system includes a main control computer for receiving and processing data, and also includes a low cycle loading device and a high frequency vibration device, among which:

[0030] The low cycle loading device includes a rigid frame structure arranged on the main platform table 11, the rigid frame structure is a quadrilateral rigid structure composed of load-bearing structure pull rods 9 and load-bearing structure front and rear plates 10, wherein the load-bearing structure pull rods 9 is in the transverse position and parallel to the actuating rod 5 of the low-circumference force hydraulic actuator 4; A hydraulic oil tank 15 and a hydraulic oil pump 14 are installed under the table 11;

[0031] On the frame st...

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Abstract

The invention relates to a high-temperature and high-low cycle composite fatigue test system. According to the system, a low-cycle load is loaded through a hydraulic system, a high-frequency vibrationload (the highest frequency can reach 1000 Hz) is loaded through an electromagnetic vibration table, fatigue testing under the combined action of axial (Y-axis) low-cycle tensile stress and horizontal (X-axis) high-frequency load can be completed for engineering part materials and engineering parts, and a load map is shown in figure 1. The system can be used for simulating the high-low cycle composite fatigue test of engineering part materials and engineering parts in a using environment in a time-saving and efficient manner, and the test system is simple, practical and relatively low in cost.

Description

technical field [0001] The invention is a high-temperature, high-low-cycle composite fatigue test system, which belongs to the technical field of mechanical performance testing. Background technique [0002] Fatigue failure is a common failure mode of engineering materials. Carrying out fatigue performance tests for engineering materials and obtaining the fatigue damage life under a specific stress level are of great significance for the design and life prediction of engineering structural parts. In the past, material fatigue tests were mostly completed by axial stress loading, and the high cycle and low cycle were carried out in the elastic range and plastic range of the material respectively, which could not reflect the actual working conditions of some engineering parts under the action of high and low cycle composite stress . In recent years, with the development of industrial technology, the demand for fatigue performance testing of advanced materials under the action...

Claims

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Application Information

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IPC IPC(8): G01N3/36G01N3/38
CPCG01N3/36G01N3/38G01N2203/0026G01N2203/0073
Inventor 杨宪峰陈新许巍何玉怀
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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