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

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 ...

AI Technical Summary

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

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