General Hopkinson bar device for compression load and stretching load

A Hopkinson rod and rod technology, used in measuring devices, using repetitive force/pulse force to test the strength of materials, instruments, etc., can solve problems that have not yet been found, and achieve the effect of convenient conversion

Inactive Publication Date: 2010-03-10
NAT UNIV OF DEFENSE TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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  • General Hopkinson bar device for compression load and stretching load
  • General Hopkinson bar device for compression load and stretching load
  • General Hopkinson bar device for compression load and stretching load

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with the accompanying drawings.

[0019] figure 1 The usual Hopkinson strut setup is given. Common Hopkinson pressure bar device is made up of high-pressure gas tank 1, the second air outlet control valve 202, air intake control valve 203, gun barrel 5, bullet rest 9, cylindrical bullet 10, compression incident rod 11, compression transmission rod 13 and The strain gauge 18 is composed. Intake control valve 203 is installed on the top of the right side end face of the high-pressure gas tank, and the second outlet control valve 202 is installed on the left side end face center of the high-pressure gas tank. Cylindrical bullet 10 is placed in gun barrel 5 by the cooperation of bullet holder 9. A strain gauge 18 is glued to the center of the rod wall of the compression incident rod 11 and the compression transmission rod 13 . Compression sample 12 is sandwiched between compression incidence rod 11 and...

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Abstract

The invention discloses a general Hopkinson bar device for compression load and stretching load, which aims to integrate compression load and stretching load into an experiment system. The invention has the technical scheme that the general Hopkinson bar device comprises a bidirectional gas emitting thrower and a bar system. The bidirectional gas emitting thrower accelerates a bullet leftwards orrightwards based on experiment requirements and comprises a high pressure gas container, a thrower pipe, a gas inlet control valve, a first gas outlet control valve, a second gas outlet control valve,a first connection pipe, a second connection pipe, a first gas conversion joint, a second gas conversion joint, a columniform or cylindrical bullet, a columniform or cylindrical top plug corresponding to the columniform or cylindrical bullet, and a top needle. The bar system comprises a compression incident bar, a compression transmission bar, a stretching incident bar, a stretching transmissionbar and strain foils. The general Hopkinson bar device overcomes difficulties in respectively creating two sets of independent equipment for a Hopkinson compression bar and a Hopkinson stretching bar,realizes the integration of the Hopkinson compression bar and the Hopkinson stretching bar and can be converted conveniently between the two load modes.

Description

technical field [0001] The invention relates to a material dynamic performance testing device, in particular to a Hopkinson rod device which can simultaneously test the stress-strain relationship of material compression and tension. Background technique [0002] In many cases, such as car crashes, spacecraft launches, etc., materials are subjected to impact loading. The mechanical response of materials under impact loading is an important mechanical performance parameter of materials, and impact loading is a key technology in the testing of dynamic performance of materials. The split Hopkinson pressure bar can successfully test the dynamic compression properties of materials (George, T., Gray III., Classic Split-Hopkinson Pressure Bar Testing. ASM Handbook-Mechanical Testing and Evaluation, 2000.8: 1032-1036.). like figure 1 The Split Hopkinson Compression Rod shown consists of a gas cannon firing a cylindrical bullet and a compression rod system. The Hopkinson bar can te...

Claims

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Application Information

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IPC IPC(8): G01N3/02G01N3/32
Inventor 陈荣林玉亮卢芳云夏开文赵鹏铎覃金贵王马法李俊玲
Owner NAT UNIV OF DEFENSE TECH
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