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 frett

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

Example Embodiment

[0040] Example 1

[0041] figure 1 It is shown that a specific embodiment of the present invention is a multi-directional fretting fatigue testing machine with a controllable test environment, including a multi-directional fretting fatigue test bench, and the top plate of the base 15 of the multi-directional fretting fatigue test bench An electromagnetic excitation actuator 3 that can move vertically is installed on 15A. The electromagnetic excitation actuator 3 is connected to the upper clamp 5 holding the spherical upper specimen 6 through the load cell 4; the lower part of the upper clamp 5 is the clamp The lower clamp of the test piece 7 under the plane, the side of the lower clamp 9 is connected to the piezoelectric ceramic actuator 11 through the load cell two 10, and the piezoelectric ceramic actuator 11 is connected to the side plate 12A of the longitudinal and transverse two-dimensional moving platform 12 ; The bottom of the longitudinal and lateral two-dimensional mobil...

Example Embodiment

[0050] Example 2

[0051] The multi-directional micro-motion fatigue testing machine with a controllable test environment in this example is exactly the same as the first embodiment. The test method of this example is also basically the same as that of Example 1, except that:

[0052] In the control of the test environment in step b, the humidity environment control operation is also performed, that is, water vapor is introduced into the atmosphere control space through the water vapor inlet 37 to make the atmosphere in the atmosphere control space reach the set humidity.

Example Embodiment

[0053] Example 3

[0054] The multi-directional micro-motion fatigue testing machine with a controllable test environment in this example is exactly the same as the first embodiment. The test method of this example is also basically the same as that of Example 1, except that:

[0055] In the control of the test environment in step b, the environment control operation of the liquid medium is also performed, that is, the outlet pipe 32 is blocked, and the liquid medium tank 30 is filled with the required liquid medium through the inlet pipe 31 to make the liquid medium The liquid surface floods the contact surface of the spherical upper specimen 6 and the lower specimen 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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