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Resonant three-point-bending high-temperature fatigue testing machine

A fatigue testing machine and three-point bending technology, which are used in vibration testing, testing of machine/structural components, and testing of material strength using repetitive force/pulse force. It can solve the problems of difficult connection design and low test efficiency. To achieve the effect of compact and reasonable structure layout, low test cost and improved test efficiency

Active Publication Date: 2017-01-25
BEIJING INST OF STRUCTURE & ENVIRONMENT ENG +1
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the design of fixtures and connections is difficult, the current mode of adding high-temperature fixtures to fatigue testing machines is limited to electro-hydraulic servo fatigue testing machines with low operating frequency, resulting in low test efficiency

Method used

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  • Resonant three-point-bending high-temperature fatigue testing machine
  • Resonant three-point-bending high-temperature fatigue testing machine

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Experimental program
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Embodiment Construction

[0026] Such as figure 1 As shown, the present invention proposes a resonant three-point bending high-temperature fatigue testing machine, including a heating furnace 1, an upper fixture 2, a lower fixture 3, a heating furnace support 4, a static load adjustment device, an active rod 7, a dynamic sensor 8, a static Force sensor 9, excitation rod 10, vibrator 11, main frame 12, adjustable stiffness spring 13, lower motion positioning reed 14, upper motion positioning reed 15, acceleration sensor 18 and base 19.

[0027] The upper fixture 2 and the lower fixture 3 cooperate to clamp the test piece 5, and one end of the upper fixture 2 is fixed on the static load adjustment device, and the upper fixture 2 is adjusted to move up and down by adjusting the static load adjustment device, so as to realize static loading on the test piece.

[0028] The main frame 12 is a hollow cylinder with an upper cover, the static load adjustment device is placed on the upper cover of the main frame...

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Abstract

The invention discloses a resonant three-point-bending high-temperature fatigue testing machine. The machine is characterized in that a dynamic loading motion component is formed by mutually connecting a lower clamp, a driving rod, a power sensor, a static force sensor, a vibration exciting rod and a vibration exciter, wherein in order to enable the dynamic loading motion component to keep an axial single-freedom-degree motion, the dynamic loading motion component is transversely restricted on a main frame by utilization of a lower motion positioning spring sheet and an upper motion positioning spring sheet, and is only allowed to move up and down; a rigidity-adjustable spring is additionally arranged between the dynamic loading motion component and the main frame, so that a higher resonant frequency is obtained; an upper clamp is fixed on a static loading regulating device; a heating furnace is positioned on a heating furnace bracket; the main frame is fixed on a base; the heating furnace bracket and the base are placed on the ground. The high-temperature fatigue testing machine disclosed by the invention has the advantages that the resonant fatigue testing machine which can meet a high temperature environment is obtained through an integrated design of a fatigue testing machine and a high-temperature clamp, and therefore not only is the high-temperature environment requirement met, but also high-efficiency experiment requirements are met.

Description

[0001] Technical field: [0002] The invention relates to a resonant three-point bending high-temperature fatigue testing machine, which belongs to the field of mechanical performance experiments of materials and structures. [0003] Background technique: [0004] The fatigue test of materials plays an important role in the research of the properties of materials and the prediction of structural integrity. Material fatigue testing equipment includes electromagnetic resonance high-frequency fatigue testing machine and electro-hydraulic servo fatigue testing machine. Compared with the electro-hydraulic servo fatigue testing machine, the electromagnetic resonance high-frequency fatigue testing machine mainly has high working efficiency, which is reflected in high working frequency, short test time, low energy consumption, low test cost, good test waveform, small wear and energy saving. Environmental friendly. Resonant high-frequency fatigue testing machines are mainly represente...

Claims

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Application Information

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IPC IPC(8): G01N3/02G01N3/32G01M7/02
CPCG01M7/00G01N3/02G01N3/32G01N2203/0073
Inventor 王建民李海波丁竹生吴建国刘宝瑞王龙任方
Owner BEIJING INST OF STRUCTURE & ENVIRONMENT ENG
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