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High-speed impact test device for mechanically fastened joint and test method

A technology of high-speed impact and mechanical connection, applied in the direction of measuring devices, using stable shear force to test the strength of materials, instruments, etc., can solve the problems of poor practicability and achieve good practicability, precise control of amplitude and pulse width, The effect of high impact speed

Active Publication Date: 2017-08-18
SHAANXI DAGONG XUHANG ELECTROMAGNETIC TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the shortcomings of poor practicability of existing test devices, the present invention provides a high-speed impact test device and test method for mechanically connected joints

Method used

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  • High-speed impact test device for mechanically fastened joint and test method
  • High-speed impact test device for mechanically fastened joint and test method
  • High-speed impact test device for mechanically fastened joint and test method

Examples

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Embodiment Construction

[0055] The following examples refer to figure 1 -8.

[0056] Device example:

[0057] The present invention is based on electromagnetic riveting technology, and uses electromagnetic force to implement impact loading on mechanically connected joints. The device includes a stress wave amplifier 1, an induction coil 2, a discharge coil 3, a stretching rod 4, a front chuck 6, a rear chuck 10, Pressure sensor 14, workbench 15 and buffer plate 16. The stress wave amplifier 1 is a conical structure with a hole in the center to amplify the electromagnetic force stress wave. The induction coil 2 is a round cake copper plate with a central hole, which is connected to the stress wave amplifier by bolts; the discharge coil 3 is a central The pie-shaped coil with through holes is fixed on the workbench 15 by bolts to provide a strong magnetic field; the stretching rod 4 includes a short stretching rod 20 and a long stretching rod 21, and the short stretching rod 20 is used for long pulse...

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Abstract

The invention discloses a high-speed impact test device for a mechanically fastened joint and a test method and aims to solve the technical problem of poor practicability of the conventional test device. The technical scheme is that the high-speed impact test device comprises a stress wave amplifier, an induction coil, a discharge coil, a tension bar, a front chuck, a rear chuck, a pressure sensor, a workbench and a buffer board, and integration of an impact shearing device and an extension force test device is realized. The test method comprises a direct loading test method and an impact loading test method. The high-speed impact test device and the test method have the advantages that the impact speed is high, and impact load amplitude and pulse width are controlled precisely, and the practicability is good. Long-pulse and medium-low-velocity impact test loading is realized through direct loading, the impact speed range is 1m.s<-1>-50m.s<-1>, the impact pulse width is 0.5 ms-6.5 ms, narrow-pulse and high-velocity impact test loading is realized through impact loading, and the impact speed range is 1m.s<-1>-300m.s<-1>.

Description

technical field [0001] The invention relates to a high-speed impact test device for a mechanical connection joint, and also relates to a method for performing a high-speed impact test for a mechanical connection joint by using the device. Background technique [0002] In structural connection, mechanical connection methods are widely used for load-carrying needs. In most cases, the mechanical connection joints are subjected to impact loads, such as the impact of birds on aircraft, the impact of explosions on structures, and high-speed collisions in traffic accidents. Under impact loading, the mechanical performance response of mechanical connection joints is quite different from that under quasi-static loading. With the increase of impact velocity, the structure usually shows phenomena such as increased stiffness, increased yield stress, and sensitivity of failure mode to strain rate. In order to meet the design and optimization requirements of the impact performance of mec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/317G01N3/24G01N3/04
Inventor 曹增强左杨杰李可包程凯
Owner SHAANXI DAGONG XUHANG ELECTROMAGNETIC TECH CO LTD
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