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Adjustable buffer device for Hopkinson test bar

A buffer device and test rod technology, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of inability to absorb the residual impact energy of rods, high requirements on the concentricity of absorbing rods, and high processing costs, so as to save material costs, The effect of reducing machining difficulty and improving precision

Inactive Publication Date: 2016-09-21
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The document "Dynamic properties of pulruded natural fiber reinforced composites using Split Hopkinson Pressure Bar technique" uses a T-shaped rigid device. This structure can hardly absorb the impact residual energy of the bar, and brings relatively large vibration to the entire experimental device. The accuracy of the measurement signal of the test bench puts forward higher requirements; the document "Dynamic material property characterization by using split Hopkinson pressure bar (SHPB) technique" adopts a more complex energy-absorbing device structure, which is complex in structure and process. The processing cost is high, this device is basically fixed in the device, and the adjustable range is very small, so the concentricity of the absorbing rod in the device is highly required

Method used

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  • Adjustable buffer device for Hopkinson test bar
  • Adjustable buffer device for Hopkinson test bar
  • Adjustable buffer device for Hopkinson test bar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The adjustable cushioning device of the Hopkinson test bar includes a cover 1, an annular bracket 2, a rubber rod 3, a rear stop 4, and a base 6; the annular bracket 2 is an annular sleeve, which is welded and fixed to the base 6, and the annular The bracket 2 is set in the middle section of the rubber rod 3, one end of the rubber rod 3 is covered with a cover 1, and the other end is in contact with the rear stop seat 4 which is welded and fixedly connected to the base 6, and there is a gap between the cover 1 and the ring bracket 2 .

Embodiment 2

[0024] An adjustable buffer device for a Hopkinson test rod, comprising a cover 1, an annular bracket 2, a rubber rod 3, a rear stop 4, and a base 6; The reinforcing ribs are fixedly connected, and the reinforcing ribs are connected with the base 6 through the coupling nut 5 . The coupling nuts 5 are distributed symmetrically about the central axis of the base, the ring bracket 2 is set on the middle section of the rubber rod 3, the rubber buffer rod 3 is in interference fit with the ring bracket 2, one end of the rubber rod 3 is covered with a cover 1, and the other end is fixedly connected to the The backstop seat 4 on the base 6 contacts, and there is a gap between the cover 1 and the ring support 2, wherein the backstop seat 4 and the base 6 are fixedly connected by bolts.

Embodiment 3

[0026] An adjustable buffer device for a Hopkinson test rod, including a cover 1, an annular bracket 2, a rubber rod 3, a rear stop 4, and a base 6; the annular bracket 2 is an annular sleeve, and the The reinforcing ribs are fixedly connected, and the reinforcing ribs are connected with the base 6 through the coupling nut 5 . The coupling nuts 5 are distributed symmetrically about the central axis of the base, the ring bracket 2 is set on the middle section of the rubber rod 3, the rubber buffer rod 3 is in interference fit with the ring bracket 2, one end of the rubber rod 3 is covered with a cover 1, and the other end is fixedly connected to the The backstop seat 4 on the base 6 contacts, and there is a gap between the cover 1 and the ring support 2, wherein the backstop seat 4 and the base 6 are fixedly connected by welding.

[0027] Its working principle is: combined with figure 1 , the device absorbs the residual impact energy through the rubber buffer rod 3, and the bu...

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PUM

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Abstract

The invention discloses an adjustable damping device of a Hopkinson test rod piece. The adjustable damping device comprises a blocking cover, an annular support, a rubber rod, a rear blocking base and a base, wherein the annular support is fixedly connected with the base; the annular support is sleeved on the middle section of the rubber rod, the blocking cover is sleeved on one end of the rubber rod, the other end of the rubber rod is contacted with the rear blocking base fixedly connected to the base, and a gap is arranged between the blocking cover and the annular support. The adjustable damping device provided by the invention has the advantages that the structure is simple, the processing cost is low, the impact surplus energy is effectively fully absorbed, the good damping effect is guaranteed, and the signal interference is avoided.

Description

technical field [0001] The invention belongs to the technical field of material dynamic mechanics research, in particular to an adjustable buffer device for a Hopkinson test rod. Background technique [0002] The adjustable buffer device of the Hopkinson test bar is designed according to the one-dimensional stress requirement of the Hopkinson experiment principle. Maximize the shock absorption effect and avoid signal interference. The document "Dynamic properties of pulruded natural fiber reinforced composites using Split Hopkinson Pressure Bar technique" uses a T-shaped rigid device. This structure can hardly absorb the impact residual energy of the bar, and brings relatively large vibration to the entire experimental device. The accuracy of the measurement signal of the test bench puts forward higher requirements; the document "Dynamic material property characterization by using split Hopkinson pressure bar (SHPB) technique" adopts a more complex energy-absorbing device s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/02
Inventor 许进升汪文强陈雄高艳宾王鸿丽钮然铭
Owner NANJING UNIV OF SCI & TECH