Improved actuation mechanism for fatigue testing machine achieving in-situ imaging of synchrotron radiation light source

A fatigue testing machine and actuating mechanism technology, applied in the direction of applying repetitive force/pulsation force to test the strength of materials, measuring devices, instruments, etc., can solve the problems of loosening, the test cannot be carried out smoothly, etc., to enhance the stability , the effect of high imaging accuracy and sensitivity, and high image signal-to-noise ratio

Active Publication Date: 2016-10-12
SOUTHWEST JIAOTONG UNIV
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  • Application Information

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Problems solved by technology

However, it is found that during the fatigue test of the fatigue testing machine, due to the severe vibration generated, and the action of the fixture on the sample during the test process often causes loosening due to the severe vibration.
In addition, there is no further adjustment method after the plastic deformation of the sample, so that the test cannot go on smoothly. Based on this actual situation, it is very necessary to further improve the actuating mechanism of the fixture

Method used

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  • Improved actuation mechanism for fatigue testing machine achieving in-situ imaging of synchrotron radiation light source
  • Improved actuation mechanism for fatigue testing machine achieving in-situ imaging of synchrotron radiation light source

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Experimental program
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Embodiment

[0019] figure 1 , figure 2 It is shown that the fatigue testing machine for in-situ imaging with synchrotron radiation light source is composed of:

[0020] The cross 1a at the bottom of the base plate 1 is fitted on the platform 2 of the synchrotron radiation source, and the middle part of the upper surface of the base plate 1 is fixed with a cylindrical base 3; the push rod 4 is installed on the left wall of the base 3 through a horizontal linear bearing 2 19 and On the right wall; Servomotor 5 is installed on the left side of base plate 1 upper surface, and cam 6 is installed on servomotor 5 axles; The right edge of the push rod 4 is in contact with the middle part of the push rod 4 and the lower end of the connecting rod 8 is hinged, and the right end of the push rod 4 is connected to the right wall of the base 3 by a spring 9.

[0021] The improved actuating mechanism of the fatigue testing machine for in-situ imaging of the synchrotron radiation light source is arrang...

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Abstract

The invention discloses an improved actuation mechanism for a fatigue testing machine achieving in-situ imaging of a synchrotron radiation light source. The actuation mechanism is arranged on a cylinder-shaped base plate on a platform of the synchrotron radiation light source and used for applying a vertical reciprocating displacement load to a test sample on the fatigue testing machine achieving in-situ imaging of the synchrotron radiation light source. Compared with the last generation of fatigue testing machines, further improvement is conducted, friction generated by a cam actuation mode is reduced, therefore, energy consumption of the fatigue testing machine is reduced, and the noise reduction performance of the fatigue testing machine is further improved; the load applied to the test sample is further guaranteed, and compared with the last generation of the fatigue testing machines, the details in the test implementation process are considered more detailedly.

Description

technical field [0001] The invention relates to a sample actuating mechanism, installation and experiment method of a fatigue testing machine which uses a synchrotron radiation light source for in-situ imaging. Background technique [0002] For a long time, people have carried out a lot of research on the fatigue damage of engineering structures. It is generally believed that the fatigue life is mainly consumed in the stages of crack initiation and short crack growth. Macroscopically, the propagation behavior of short cracks changes with the increase of crack length, and microscopically, it is also affected by factors such as metal microstructure and environment, coupled with crack closure and small crack effects, etc. The problem of short crack propagation becomes very complicated. In order to better explore the relationship between the crack growth process and microstructure changes and macroscopic mechanical properties, and to provide a more reliable theoretical basis f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/38
CPCG01N3/38G01N2203/0005
Inventor 吴圣川张思齐宋哲
Owner SOUTHWEST JIAOTONG UNIV
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