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Electromagnetic impact dynamic tensile test method and device

A dynamic tensile and test method technology, applied in the direction of applying stable tension/pressure to test the strength of materials, can solve the problems of complex loading method, low strain rate, and many influencing factors, and achieve convenient clamping of specimens, Accurate control and good repeatability

Active Publication Date: 2011-06-29
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

The method makes the strain rate of the material relatively low, which is indirect stretching, and the loading method is complicated, with many influencing factors, complicated calculation and high test cost

Method used

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  • Electromagnetic impact dynamic tensile test method and device

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Embodiment Construction

[0028] Combine below figure 1 Describe in detail the details and working conditions of the specific device proposed by the present invention.

[0029] Such as figure 1 As shown, the electromagnetic shock dynamic tensile test device includes: a computer central processing unit 1, an electromagnetic pulse controller 2, a charging device 3, a charging switch 4, a pulse energy storage capacitor bank 5, a discharge switch 6, and an electromagnetic force generating system 7. Fixture A9, bracket 10, distance support 11, optical extensometer 12, guide rail 13, target 14, fixture B15, electromagnetic pulse device 16, magnetic collector 17, and electromagnetic pulse coil 18.

[0030] The computer central processing unit 1 controls the charging and discharging time of the pulse energy storage capacitor bank 5 through the electromagnetic pulse controller 2, the start discharge switch 6 is disconnected, the charging switch 4 is turned on, and the charging device 3 charges the pulse energy...

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Abstract

The invention relates to an electromagnetic impact dynamic tensile test method and a device, and belongs to the technical field of dynamic tensile mechanical property test of materials. The device adopts an electromagnetic pulse to load; a tensile test piece (8) passes through a central hole of an electromagnetic pulse device (16); the electromagnetic pulse device (16) is used for arousing a strong-pulse magnetic field; the action of electromagnetic force is generated between a target (14) and an electromagnetic pulse coil (18), so that the tensile test piece (8) mounted between the target (14) and a bracket (10) obtains direct instantaneous tensile force to finish the dynamic tensile test of the tensile test piece (8). The method and the device are used for measuring the dynamic stress and strain relationship of the materials in a high strain state; and the device has simple structure and simple test process, can be used for carrying out direct dynamic tensile test as well as the dynamic tensile test of the materials under the conditions of different high strain rates and ultrahigh strain rates, and has low cost and good application prospect.

Description

technical field [0001] The invention relates to the technical field of material dynamic tensile mechanical performance testing, in particular to a method and a device capable of realizing high strain rate tensile testing under dynamic conditions of electromagnetic impact loading. Background technique [0002] In a series of practical problems in a wide range of fields such as engineering technology, military technology and scientific research, and even in daily life, people will encounter various problems of explosions and impact loads, and it can be observed that objects in The mechanical responses under explosion and impact loads are often significantly different from those under static loads. Understanding the mechanical responses of materials under impact loading conditions will greatly contribute to the engineering applications and engineering designs of these materials. In addition, numerical simulation has played an important role in engineering design, and the premis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/08
Inventor 姜银方钱晓明姜文帆张永康戴峰泽黄勤何玉中管海兵
Owner JIANGSU UNIV
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