Loading device and loading method for expansion loop

A loading device and expansion ring technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of uncontrollable loading process, poor loading reliability, high sample temperature, etc., to achieve simple and practical loading device, stable loading process, and application wide range of effects

Active Publication Date: 2014-09-17
NAT UNIV OF DEFENSE TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a simple operation, controllable loading, convenient data measurement, suitable for laboratory The expansion ring loading device and loading method solve the problems of uncontrollable loading process, poor loading reliability, high sample temperature, and small application range, etc.

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  • Loading device and loading method for expansion loop
  • Loading device and loading method for expansion loop
  • Loading device and loading method for expansion loop

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with the drawings.

[0030] image 3 Is the main view of the loading device of the present invention; image 3 As shown, the loading device is composed of a projectile 7, a driver 8 and a target board 9.

[0031] Projectile 7 selects density ρ 3 The yield strength is within the range of 20MPa-50MPa, and it is easy to deform under impact, and the compression rate is less than 5%. The projectile 7 is cylindrical, with a diameter of C and a length of H. The velocity V of the projectile 7 before colliding with the target 9 1 Between 100 and 1000 m / s, the projectile 7 needs to be accelerated to this speed range by the acceleration device 11, and the acceleration device 11 generally uses a light gas gun. The diameter C of the projectile 7 is determined by the inner diameter φ of the acceleration device 11, and the value of C / φ is between 0.5 and 0.95. The value of H / C is between 0.6 and 3.

[0032] The driver 8 ...

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Abstract

The invention discloses a loading device and a loading method for an expansion loop, and aims to solve the problems that a loading procedure is uncontrollable, the loading reliability is poor, the sample temperature is too high, and an application scope is narrow. The loading device for the expansion loop consists of a pellet, an actuator and a target board. The density and the yield strength of the pellet are low, so that the pellet deforms easily under an impact effect; the actuator is a metal cylinder; the yield strength and the density of the actuator are greater than that of the pellet; and the target board is made of a high-strength and high-density material. The loading method comprises the steps that the pellet impacts the target board at a high speed, and lateral expansion is generated, resulting in that internal pressure of the actuator rises sharply; the actuator expands due to the pressure; and the expansion loop expands radially by the action of the actuator. The loading device is simple and practical, and can load precisely; a scope of a loading strain ratio is greater than that of the existing device; the loading procedure is not limited by the material of the expansion loop; and the loading device is wide in application scope.

Description

Technical field [0001] The invention relates to a high strain rate loading device and a loading method, in particular to a loading device and a loading method for realizing a high strain rate of an expansion ring. Background technique [0002] The expansion ring loading technology has always been a concern and research problem, and it plays a key role in the high strain rate experiment of materials. [0003] There are two common expansion ring loading devices and loading methods: [0004] Such as figure 1 As shown, the first expansion ring loading device adopts explosive drive loading. The loading device is mainly composed of three parts: detonator 1, column charge 2 and metal cylinder 3. The column charge 2 is put into the metal cylinder 3, and the expansion ring 10 to be tested is sleeved on the outside of the metal cylinder 3. Using the detonating cylinder charge 2 of the detonator 1, the generated detonation wave and detonation products drive the metal cylinder 3 to expand, an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/02G01N3/313
Inventor 梁民族陈荣李翔宇林玉亮卢芳云覃金贵曹雷王马法张舵胡玉涛蒋邦海文学军
Owner NAT UNIV OF DEFENSE TECH
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