Tester and method for testing test environment controllable multi-directional fine motion fatigue

A fretting fatigue, test environment technology, applied in the direction of testing wear resistance, using stable tension/pressure to test material strength, measuring devices, etc. Performance and life, use and maintain accurate results

Inactive Publication Date: 2012-07-25
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(2) Fatigue caused by fretting: fretting can accelerate the initiation and expansion of cracks, greatly reducing the fatigue life of components, and the fretting fatigue limit can even be lower than 1 / 3 of the ordinary fatigue limit
At present, there is no special multi-directional fretting test equipment and method.

Method used

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  • Tester and method for testing test environment controllable multi-directional fine motion fatigue
  • Tester and method for testing test environment controllable multi-directional fine motion fatigue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] figure 1 As shown, a specific embodiment of the present invention is a multi-directional fretting fatigue testing machine with controllable test environment, including a multi-directional fretting fatigue test bench, and the top plate of the support 15 of the multi-directional fretting fatigue testing bench 15A is equipped with an electromagnetic excitation actuator 3 that can move vertically, and the electromagnetic excitation actuator 3 is connected to the upper clamp 5 that clamps the spherical upper test piece 6 through the load cell 4; the lower part of the upper clamp 5 is the clamping The lower fixture of the test piece 7 under the plane, the side of the lower fixture 9 is connected to the piezoelectric ceramic actuator 11 through the force sensor 2 10, and the piezoelectric ceramic actuator 11 is connected to the side plate 12A of the vertical and horizontal two-dimensional mobile platform 12 The bottom of the vertical and horizontal two-dimensional mobile platf...

Embodiment 2

[0051] The multi-directional fretting fatigue testing machine with controllable test environment in this example is exactly the same as that in Example 1. The test method of this example is also basically the same as the method of embodiment 1, and the difference is only:

[0052] In the control of the test environment in step b, the environment control operation of humidity is also carried out, that is, water vapor is introduced into the atmosphere control space through the water vapor inlet 37, so that the atmosphere in the atmosphere control space reaches the set humidity.

Embodiment 3

[0054] The multi-directional fretting fatigue testing machine with controllable test environment in this example is exactly the same as that in Example 1. The test method of this example is also basically the same as the method of embodiment 1, and the difference is only:

[0055] In the control of the test environment of step b, the environment control operation of the liquid medium is also carried out, that is: stop the liquid outlet pipe 32, and fill the required liquid medium into the liquid medium tank 30 through the liquid inlet pipe 31, so that the liquid medium The liquid surface submerges the contact surface of the spherical upper test piece 6 and the plane lower test piece 7 .

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Abstract

The invention discloses a tester and a method for testing test environment controllable multi-directional fine motion fatigue. The tester comprises a vertical fine motion mechanism and a transverse fine motion mechanism, wherein the vertical fine motion mechanism consists of an electromagnetic excitation actuator, a force transducer I, an upper clamp for clamping a spherical upper test piece and the like; the transverse fine motion mechanism consists of a lower clamp for clamping a planar lower test piece, a force transducer II, a piezoelectric ceramic actuator, a longitudinal and transverse two-dimensional moving platform and the like; the vertical fine motion mechanism and the transverse fine motion mechanism are covered by a lower atmosphere cover and an upper atmosphere cover to form an atmosphere control space; and the periphery of the lower clamp is provided with a liquid medium groove higher than the planar test piece. Through the tester, a tightly matched friction pair can carry out multi-directional fine motion in a specific atmosphere and / or a liquid environment controlled artificially, thus the multi-directional fine motion frictional wear performance of a material under the specific environment condition is tested really and accurately, an accurate and reliable proof is provided for related design, use and maintenance of machinery and bioengineering, the properties of equipment and apparatuses are improved, and the service lives of the equipment and the apparatuses are prolonged.

Description

technical field [0001] The invention relates to a multi-directional fretting fatigue testing machine with controllable test environment and a multi-directional fretting fatigue test method with controllable test environment. Background technique [0002] Fretting refers to the relative motion of extremely small amplitude (micron level) between two contact surfaces (such as tight fitting surfaces) under the action of alternating loads such as mechanical vibration, fatigue load, electromagnetic vibration or thermal cycle. The contacting surfaces are usually nominally stationary, i.e. fretting occurs in mechanical parts that are "tightly" fitted. Fretting tribology is a branch of disciplines that studies the mechanism of fretting, damage, testing, monitoring, and prevention. Electrical Engineering etc. Fretting is a friction method with a small relative motion range, and the material damage caused by it is usually manifested in two forms, namely: (1) Wear caused by fretting: ...

Claims

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Application Information

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IPC IPC(8): G01N3/56G01N3/08G01N3/04
Inventor 朱旻昊蔡振兵莫继良彭金方任平弟周琰周仲荣石心余
Owner SOUTHWEST JIAOTONG UNIV
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