Horizontal type SHPB beam test device

Abstract

The invention discloses a horizontal type SHPB beam bar test device. The horizontal type SHPB beam test device comprises an incident beam, a transmission beam, a striking bullet, a bullet launching device, an energy absorption device and a dynamic signal collecting system, wherein the incident beam is composed of multiple square incident single beams, the transmission beam is composed of multiple square transmission single beams, and the number of the transmission single beams is equal to the number of the incident single beams. The horizontal type SHPB beam test device is characterized in that the incident beam and the transmission beam are respectively provided with beam supports which can move in the axial direction, a to-be-tested large-size concrete sample support is arranged between the incident beam and the transmission beam, and the moving direction of the sample support is perpendicular to the moving direction of the beam supports. The horizontal type SHPB beam test device has the advantages that the integral device can be perfectly connected to a traditional SHPB pressure beam test platform, the occupied space is relatively small, the installation and maintenance are convenient, the consuming time is short, moving fictional force of a guide rail is small, and location movement and adjustment of the incident beam and the transmission beam are very convenient.

Description

technical field [0001] The invention relates to a Hopkinson compression bar test device, in particular to a horizontal SHPB beam test device. Background technique [0002] With the development of the national economy and national defense construction, the research on the dynamic mechanical properties of multiphase and heterogeneous composite materials has aroused the common attention of the mechanics and materials science circles. Among them, concrete materials (including ordinary concrete, ceramsite concrete and special concrete) It is the most widely used in engineering, and more and more attention is paid to the understanding of its related mechanical properties. [0003] The research on the static mechanical properties of concrete is relatively mature, while the research on the impact dynamic mechanical properties of concrete is relatively less, but the demand is urgent. To study the dynamic response of concrete under impact load, the strain rate effect is one of the m...

AI Technical Summary

Problems solved by technology

According to the uniformity requirements of the sample material, the concrete requires a larger sample size due to the existence of coarse aggregate. If the traditional single-rod SHPB technology is used, the size of the incident rod and the transmitted rod will also become larger, which will cause the transverse direction of the rod. Inertial effects, distorting test results

[0004] In order to solve the above-mentioned technical problems, the Chinese utility model patent with the application date of January 6, 2010 and the patent number ZL201020049494 discloses a dynamic compression test device for a Hopkinson compression bar, which is characterized in that it includes a bracket and an impact bar. The guide rail is fixedly installed, and the impact rod is slidingly matched with the guide rail. The incident beam rod and the transmission beam rod are arranged in the guide rail. The incident beam rod is composed of multiple incident single rods, and the transmission beam rod is composed of multiple transmission single rods. Rods and transmission single rods form a pair of Hopkinson compression rods that satisfy the one-dimensional stress wave condition; the advantage is that the stress wave transverse dispersion effect of each single rod can be ignored, so that it meets the assumption of one-dimensional stress wave; it is convenient to adopt the traditional The experimental data testing and analysis method of Hopkinson technology can realize the dynamic compression experimental research of large-scale concrete in line with engineering reality; however, the device is installed vertically, which occupies too much space, difficult installation and maintenance, and a large amount of experimental preparation work , It takes a long time, and it is difficult to raise and lower the incident beam rod, and it is also difficult to place the concrete sample and adjust the alignment of the beam rod and the impact rod

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