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High-temperature hopkinson compression bar test system and method assembled synchronously by two-way electromagnetic drive

A test system and electric drive technology, applied in the application of stable tension/pressure to test the strength of materials, the application of repetitive force/pulse force to test the strength of materials, and the measurement device, etc., can solve the problems of heat exchange temperature gradient field, etc. The effect of improving test accuracy

Active Publication Date: 2022-03-04
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0007] In order to avoid the deficiencies of the prior art, the present invention proposes a high-temperature Hopkinson compression bar test system and method that utilizes two-way electromagnetic drive and synchronous assembly to solve the problem that the separated Hopkinson compression bar must avoid the contact between the loading bar and the high-temperature dynamic compression test. The heat exchange of the sample leads to the generation of the temperature gradient field

Method used

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  • High-temperature hopkinson compression bar test system and method assembled synchronously by two-way electromagnetic drive
  • High-temperature hopkinson compression bar test system and method assembled synchronously by two-way electromagnetic drive
  • High-temperature hopkinson compression bar test system and method assembled synchronously by two-way electromagnetic drive

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specific Embodiment

[0037] Specific embodiments: the device includes a pressure sensor 1, an electromagnetic control valve 2, a gun barrel 3, a percussion rod 4, a polytetrafluoroethylene bomb holder 5, an incident rod 6, a transmission rod 7, a strain gauge 8, a damper 9, and a launch gas Chamber 10, air source 11, launching delayer 12, synchronous delayer 13, programmable controller 14, stepper motor 15, forward screw 16, reverse screw 17, driving arm 18, console 19, sliding sleeve Tube 20, induction heating coil 21, high-frequency electromagnetic induction heating machine 22, temperature sensor 23, polytetrafluoroethylene clamp 24, sample 25, booster solenoid valve 26, decompression solenoid valve 27, temperature controller 28, reducing Pressure switch 29, boost switch 30, start switch 31, digital display pressure gauge 32, aluminum alloy sliding support 33-1, aluminum alloy fixed support 33-2, aluminum alloy platform 34, thermocouple wire 35.

[0038]The device in the present invention mainly...

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Abstract

The present invention relates to a high-temperature Hopkinson pressure bar test system and method using two-way electromagnetic drive and synchronous assembly, establishing a set of high-temperature Hopkinson pressure bar system and high-temperature compression using precise electromagnetic drive two-way synchronous sliding assembly system and high-frequency electromagnetic induction rapid heating method experiment method. This device is equipped with a set of electromagnetic control device, a set of electromagnetic drive two-way synchronous assembly device and two high-precision delay devices on the conventional Hopkinson pressure rod, which can accurately control each process in the high temperature dynamic compression test, including the impact process, heating The start and finish times of the process, loading rods, and assembly processes are synchronized, allowing precise control of the hot and cold contact times throughout the testing process. The integrated modular design of control components improves the test accuracy and can accurately and directly test the dynamic compression mechanical properties of materials at high temperatures.

Description

technical field [0001] The invention belongs to the separated Hopkinson pressure bar (SHPB) technology, and relates to a high-temperature Hopkinson pressure bar test system and method using bidirectional electromagnetic drive for synchronous assembly, and a quantitative high-temperature high-strain rate compression test technology for synchronous assembly using bidirectional electromagnetic drive . Background technique [0002] Split Hopkinson pressure bar (SHPB), as the key test technology for testing the high strain rate compressive mechanical properties of materials and structures, is widely used in the field of dynamic testing. Traditional SHPB equipment is often used for dynamic mechanical performance testing of metal materials, composite materials, rock concrete, ceramics and other materials at room temperature. However, with the continuous development of new materials, more and more materials (especially metal materials and ceramic materials) are widely used in the e...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/32G01N3/18G01N3/02G01N3/06
CPCG01N3/32G01N3/18G01N3/02G01N3/06G01N2203/001G01N2203/0019G01N2203/0075G01N2203/0226
Inventor 李鹏辉郭伟国王建军袁康博
Owner NORTHWESTERN POLYTECHNICAL UNIV
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