Three-way confining pressure and temperature combined loading device for Hopkinson compression bar impact test
A Hopkinson compression bar and combined loading technology, applied in the direction of measuring devices, strength characteristics, instruments, etc., can solve the problem of loading devices lacking Hopkinson compression bar impact experiments, unable to provide material dynamic parameters, and unable to perform material dynamics problems such as scientific experiments to achieve the effect of ensuring axial pressure
Inactive Publication Date: 2014-06-11
PLA UNIV OF SCI & TECH
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[0005] However, in the actual working environment, materials will be affected by the joint action of three-dimensional confining pressure and temperature, and the existing experimental equipment cannot conduct material dynamic experiments under the joint action of three-dimensional confining pressure and temperature
[0006] With the urgent need for the cognition of the dynamic mechanical properties of materials under different three-dimensional confining pressure and temperature states in actual engineering, the problem in the existing technology is: the lack of a Hopkinson pressure that can realize the three-dimensional confining pressure and temperature. The loading device of the rod impact test cannot provide the material dynamic parameters under the combined action of three-dimensional confining pressure and temperature for scientific calculation and engineering applications
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[0014] Such as figure 1 Shown is a Hopkinson compression bar impact test device equipped with a three-way confining pressure and temperature combined loading device for the Hopkinson compression bar impact test of the present invention. The Hopkinson pressure rod impact test device includes bullets 4 , incident rods 7 , test pieces 25 and transmission rods 26 arranged on a fixed bracket in sequence along the axial direction. The bullet 4 is placed in the bullet launching mechanism 3, and the high-pressure gas tank 1 is connected with the bullet launching mechanism 3 to provide power for the bullet launching device 3. A speedometer 5 is arranged between the bullet 4 and the incident rod 7 to measure the incident velocity of the bullet 4 . The portion of the incident rod 7 impacted by the bullet is provided with a wave-shaping gasket 6 . A strain gauge 25 is attached to the incident rod 7 and the transmission rod 26 ; the strain measured by the strain gauge 25 is finally recor...
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The invention discloses a three-way confining pressure and temperature combined loading device for a Hopkinson compression bar impact test. The three-way confining pressure temperature combined loading device comprises an axle load loading device consisting of an incident rod and a transmitting rod and an annular pressure temperature combined loading device, wherein the annular pressure temperature combined loading device comprises a cylinder of which two ends are provided with cylinder covers; a shaft hole through which the incident rod and the transmitting rod penetrate is reserved in the middle of the cylinder cover; a test piece is coaxially arranged between the incident rod and the transmitting rod; an oil-resistant rubber sleeve is arranged on the test piece and at the periphery of the incident rod and the transmitting rod in the cylinder; a test piece positioning sleeve with a hole is arranged on the outer side of the oil-resistant rubber sleeve; an exhaust hole is formed above the cylinder, and an oil injection hole is formed below the cylinder; a heating device is arranged on the outer side of the test piece positioning sleeve; a temperature measurement device is arranged on the surface of the test piece. By adoption of the combined loading device, the Hopkinson compression bar impact test loading of three-way confining pressure and temperature coaction can be realized, and material dynamic parameters under the three-way confining pressure and temperature coaction are provided for scientific calculation and engineering application.
Description
[0001] technical field [0002] The invention belongs to the technical field of experimental research equipment for the dynamic performance of materials, in particular to a three-way confining pressure and temperature combined loading device for the impact experiment of a Hopkinson pressure bar. Background technique [0003] Existing Split Hopkinson Pressure Bar (SHPB) experimental devices consider the effects of three-dimensional confining pressure and temperature separately, without considering the combined effect of three-dimensional confining pressure and temperature. The Hopkinson pressure rod experiment device at high temperature, represented by the rapid rod alignment technology, can realize the Hopkinson pressure rod experiment of materials at a specific temperature, and is used to measure the dynamic stress peak value of materials at different temperatures and other parameters. The Hopkinson pressure bar three-way confining pressure loading device represented by app...
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IPC IPC(8): G01N3/02
Inventor 方秦陈力姜锡权张亚栋张锦华翟超晨言克斌
Owner PLA UNIV OF SCI & TECH
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