Fatigue testing machine for lifetime measurement of cantilever parts

A fatigue testing machine and cantilever technology, which is used in the testing of mechanical components, the testing of machine/structural components, and measuring devices, etc., can solve problems such as the inability to directly and accurately characterize the fatigue life parameters of cantilevers, and achieve fast experimental speed. , to ensure the effect of persuasion

Inactive Publication Date: 2013-04-03
TSINGHUA UNIV
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  • Abstract
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Problems solved by technology

[0003] At present, the fatigue life analysis of cantilever structures often requires finite element simulation, combined with the S-N fa

Method used

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  • Fatigue testing machine for lifetime measurement of cantilever parts
  • Fatigue testing machine for lifetime measurement of cantilever parts
  • Fatigue testing machine for lifetime measurement of cantilever parts

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Embodiment Construction

[0013] The specific structure and working principle of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0014] refer to figure 1 , figure 2 and image 3 , the measuring instrument consists of four parts: base 1, motor 2, eccentric mechanism, loading mechanism and sample clamping device. Among them, the motor 2 is fixed on the base 1, the eccentric mechanism includes an eccentric disc 4, an eccentric block 5 and a screw 22; the loading mechanism includes a front connecting rod 6, a push rod 8, a linear bearing 9, a tension pressure sensor 11, and a rear connecting rod Adapter block 12 and rear connecting rod 14; There is a through groove at the front end of the eccentric disk 4, and the lead screw 22 is installed in the through groove, and the lead screw 22 forms a threaded fit with the eccentric block 5, and the lead screw passes through the upper end cover 24 and The lower end cover 21 is installed on the ecc...

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Abstract

A fatigue testing machine for lifetime measurement of cantilever parts comprises a base, a motor, an eccentric mechanism, a loading mechanism and a test piece clamping device. Rotation of the motor is converted into variable amplitude constant-amplitude reciprocating motion by the eccentric mechanism and the loading mechanism. The front end and bottom of a cantilever test piece to be tested are fixed by the test piece clamping device, so that the front end of the cantilever test piece is allowed to fatigue by reciprocating swing. The defect that commercially available instruments are not applicable to structural fatigue lifetime measurement of practical cantilever parts but applicable to material fatigue lifetime measurement of standard parts only is overcome, test conditions that existing commercial products cannot achieve can be achieved, serving actual lifetimes of the cantilever parts are predicted more accurately, and more reliable basis for structural design and modeling of the cantilever parts.

Description

technical field [0001] The invention relates to a fatigue life testing device of a mechanical component, in particular to a fatigue life testing device of a cantilever type mechanical component. Background technique [0002] In the fields of machinery, metallurgy, chemistry, construction, etc., the cantilever structure is often the weak link in the system but also an indispensable key part. Under various standard or non-standard cyclic loads, the cantilever structure is prone to fatigue fracture failure. Once it fails, it will likely cause the entire system to collapse, which will seriously affect the work process and greatly reduce production efficiency. Therefore, it is very important to judge the fatigue life of the cantilever structure for the design and selection of the structure and the economic benefits of the entire industry. [0003] At present, the fatigue life analysis of the cantilever structure often requires the use of finite element simulation, combined with ...

Claims

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Application Information

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IPC IPC(8): G01M13/00
Inventor 马源瞿体明崔静于晓宇曾攀雷丽萍
Owner TSINGHUA UNIV
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