A disc-type strain multiplier for amplifying surface strain of a mechanical part in real time under multi-axis load and a design method

A technology of mechanical parts and multi-axis loading, applied in instruments, calculations, special data processing applications, etc., can solve the problem of low magnification of strain multipliers, and achieve the effect of improving service life, reducing concentrated stress and reducing weight

Active Publication Date: 2019-05-17
DALIAN UNIV OF TECH
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Problems solved by technology

[0004] The present invention is aimed at the situation that the current strain multiplier cannot perform multi-axis amplif

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  • A disc-type strain multiplier for amplifying surface strain of a mechanical part in real time under multi-axis load and a design method
  • A disc-type strain multiplier for amplifying surface strain of a mechanical part in real time under multi-axis load and a design method
  • A disc-type strain multiplier for amplifying surface strain of a mechanical part in real time under multi-axis load and a design method

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Embodiment Construction

[0033] The specific implementation manner of the present invention will be described in detail below in conjunction with the accompanying drawings and technical solutions.

[0034] Figure 5 It is a schematic diagram of the specific installation of the disc strain multiplier. The disc strain multiplier S uses the strain transfer method to amplify the strain on the surface of the tested mechanical part H in all directions in the same proportion. The disk surface of the device S receives the surface stress of the mechanical structure, and transmits the stress to the rubber body F of the disk center to transfer the strain, and realizes the real-time amplification of the strain by using the superelasticity of the rubber body F of the disk center.

[0035] 1) When the disc center rubber body F is glued to the inner hole of the central hollow cylinder A, an interference fit is used to ensure that the disc strain multiplier S can still rely on its own deformation and inner diameter ...

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Abstract

The invention provides a disc-type strain multiplier for amplifying the surface strain of a mechanical part in real time under a multi-axis load and a design method, and belongs to the technical fieldof fatigue life prediction of the mechanical part. The multi-axis strain condition of the surface of the mechanical part is obtained through a disc type strain multiplier mounting foot mounted on thesurface of the mechanical part, and the disc center rubber body of the disc type strain multiplier is used for mechanically amplifying the average strain of the surface of a mechanical part at the covering position of the disc surface by a certain multiple, so that the fatigue life meter mounted on the multiplier can work within an effective strain amplitude range, and the safe and reliable operation of mechanical equipment is ensured.

Description

technical field [0001] The invention relates to a method for real-time amplification of the surface strain of mechanical parts, in particular to a disc-type strain multiplier and a design method for real-time amplification of the surface strain of mechanical parts under multi-axial loads, which can be matched with a fatigue life meter to realize the prediction of the remaining life of the mechanical structure. The invention belongs to the technical field of fatigue life prediction of mechanical parts. Background technique [0002] At present, due to the high strain threshold, the fatigue life meter cannot be directly installed on the surface of mechanical parts to predict the remaining life. It is necessary to use a strain multiplier to mechanically amplify the strain at a certain position of the structure before measuring it. However, at present The research on strain multipliers at home and abroad is limited to the field of uniaxial amplification of structural surface stra...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCY02T90/00
Inventor 霍军周张伟张占葛
Owner DALIAN UNIV OF TECH
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