Device for quickly and accurately adjusting and aligning Hopkinson pressure bar
An accurate and fast technology, applied in the direction of measuring devices, using one-time impact force to test the strength of materials, instruments, etc., can solve the problems of time-consuming, bulky structure, and large influence of subjective factors, so as to eliminate the influence of human factors and improve the adjustment accuracy , fast and precise adjustment effect
Inactive Publication Date: 2021-07-09
HEFEI UNIV OF TECH
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Problems solved by technology
It solves the technical problems of the traditional Hopkinson pressure bar in the adjustment and alignment work, such as bulky structure, long time-consuming and great influence of subjective factors, etc.
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[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0031] Such as Figure 1-3 As shown, a device for quickly and accurately adjusting and aligning Hopkinson pressure rods includes a ballistic 15, an incident rod 9 and a transmission rod 11, a support 1, a number of hand-operated distance adjustment structures 3, and a number of hand-operated distance adjustment structure screw rods 5. Ballistic support 16 and several support components;
[0032] The support 1 is provided with a track 2, a ballistic support 16 is i...
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The invention relates to the field of material dynamic mechanical property test experiments, in particular to a device for rapidly and accurately adjusting and aligning a Hopkinson pressure bar. The leveling distance can be quantified through distance measuring instruments on the two sides of a support, and when rod pieces need to be replaced during test of samples with different diameters, the device can quickly guide the hand-operated distance adjusting structure to adjust the height of the support to a target value. A laser emitter fixed above the ballistic trajectory and the rod piece and the baffle structure inspect and guide alignment of the instrument. The device quantifies and visualizes the adjustment distance before the Hopkinson bar test, improves the adjustment precision, eliminates the influence of human factors, and ensures the accuracy and repeatability of the test result. The technical problems that a traditional Hopkinson pressure bar is heavy in structure, long in consumed time, large in subjective factor influence and the like in adjustment and alignment work are solved.
Description
technical field [0001] The invention relates to the field of testing experiments of dynamic mechanical properties of materials, in particular to a device for quickly and accurately adjusting and aligning Hopkinson pressure bars. Background technique [0002] Nowadays, in the scientific research of civil engineering fields such as coal mine excavation and tunnel construction, military fields such as shell performance testing, and material dynamic mechanical performance testing, it is inevitable to involve various dynamic load problems, such as blasting, impact and hit and so on. In the above dynamic load problem, the strain rate of the material is different from that of static or quasi-static, and the yield stress and strength of the material will change at the same time, and the plasticity of the corresponding material will also decrease accordingly, and the yield hysteresis will be more significant. The constitutive relationship obtained under the conditions will also chan...
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IPC IPC(8): G01N3/02G01N3/30
CPCG01N3/02G01N3/30G01N2203/0044
Inventor 王志亮李松玉熊峰巫绪涛
Owner HEFEI UNIV OF TECH