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High-temperature Hopkinson tensile bar test system by using two-way electromagnetically-driven synchronous assembly and method

An electromagnetic drive and test system technology, applied in the direction of applying stable tension/pressure to test material strength, applying repetitive force/pulsation force to test material strength, measuring devices, etc., can solve problems such as heat exchange temperature gradient field, and achieve The effect of improving test accuracy

Active Publication Date: 2019-09-03
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 tensile bar test system by using two-way electromagnetically-driven synchronous assembly and method
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  • High-temperature Hopkinson tensile bar test system by using two-way electromagnetically-driven synchronous assembly and method

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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 invention relates to a high-temperature Hopkinson tensile bar test system by using two-way electromagnetically-driven synchronous assembly and method. A high-temperature Hopkinson tensile bar system and a high-temperature compression test method which use an accurate electromagnetically-driven two-way synchronous sliding assembly system and a high-frequency electromagnetic induction rapid heating method are built. According to the device in the invention, a set of electromagnetic control device, a set of electromagnetically-driven two-way synchronous assembly device and two high-precisiondelay devices are additionally arranged on the conventional Hopkinson tensile bar, the starting and ending time of each process including an impact process, a heating process and a loading rod synchronous assembly process during the high-temperature dynamic compression test can be accurately controlled, and the cold and hot contact time during the whole test process can be further accurately controlled. A control component is designed in an integrated module mode, the test accuracy is improved, and the dynamic compression mechanical properties of the material at a high temperature can be accurately and directly tested.

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 Applications(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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