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Loading device used for lateral-torsional vibration fatigue experiment and method thereof

A technology of vibration fatigue and loading devices, which is applied in the direction of measuring devices, using stable bending force to test the strength of materials, instruments, etc., to achieve the effect of overcoming single function and low cost

Active Publication Date: 2018-10-26
NANCHANG HANGKONG UNIVERSITY
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention provides a fatigue test method with wide application and various loading functions, and at the same time provides a corresponding fatigue test device to solve the problems existing in the multi-axis coupling loading mode of the existing fatigue test machine, and obtain A test bench for fatigue performance testing of specimens under various boundary conditions

Method used

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  • Loading device used for lateral-torsional vibration fatigue experiment and method thereof
  • Loading device used for lateral-torsional vibration fatigue experiment and method thereof
  • Loading device used for lateral-torsional vibration fatigue experiment and method thereof

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Embodiment 1

[0032] Embodiment 1: A preferred embodiment of the present invention is provided below. Take the rectangular section beam specimen as an example:

[0033] First, install the test device, fix the test piece 3 on the fixture 4, and adjust the nuts at both ends of the clamp rod 43. When the screws of the pressure plate 41 are compressed, the end of the test piece 3 can be fixed; adjust the nuts of the pressure plate 41. When the screw of the clamping rod 42 is properly tightened, the end of the specimen can be simply supported. At the same time, it is very convenient to test the fatigue performance of the specimen 3 in the cantilever mode when only one end is fixed. The installation of the loading arm 5 is relatively convenient, and the clamping base 52 and the clamping head 51 are clamped at the position where the test piece 3 is to be loaded, and the fixing screws can be tightened. The hydraulic vibration exciter 7 needs to be installed according to the test mode to be carrie...

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Abstract

The invention discloses a loading device used for a lateral-torsional vibration fatigue experiment and a method thereof. A sliding groove is formed in a base, brackets are installed at the two ends ofthe base, and a vibration exciter is connected to the sliding groove; the base body is connected with the brackets through bolts, rotary shafts are arranged on the two sides of a sliding sleeve, a clamping roller is installed above the sliding sleeve, and the rotary shafts are connected with a sliding seat and a shaft hole of a side plate; a guiding rod is sleeved with the sliding sleeve, and oneend of the guiding rod is connected with a loading arm; a clamping seat and a clamping head of the loading arm are opposite to each other, a V-shaped groove is formed in the clamping seat, and a second coupler is installed below the clamping seat. The loading device has adjustability and enough clamping force to ensure the stability of a platform, can provide pure torsion loading, torsion and transverse bending coupling loading, torsion and longitudinal bending coupling loading, torsion and oblique bending coupling loading and pure bending loading, has the advantages of high accuracy, high efficiency, low cost and multiple functions, and has important practical value regarding the completion of the vibration fatigue performance experiment for experimental piece materials with rectangularcross sections and circular cross sections.

Description

technical field [0001] The invention belongs to the technical field of material properties and material testing equipment, and in particular relates to a vibration fatigue test loading device and method for bending fatigue, torsional fatigue and bending-torsional coupling fatigue. Background technique [0002] Fatigue exists widely in fields such as aerospace and mechanical engineering. In order to explore the fatigue properties of materials, the most common research method is experimental research. At present, the commonly used fatigue testing machine is mainly suitable for fatigue testing of uniaxial loading such as tension-compression, bending and torsion. However, in engineering practice, the loads on the machine structure are often multi-axial loading, among which bending-torsional coupling loading is the most common load form. For the traditional fatigue testing machine can only provide a single loading mode, it is of great significance to design a vibration fatigue ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/00G01N3/20G01N3/26
CPCG01N3/00G01N3/20G01N3/26G01N2203/0028G01N2203/0073
Inventor 刘文光王耀斌贺红林
Owner NANCHANG HANGKONG UNIVERSITY
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