Hopkinson Beam Rod Dynamic Test System
A Hopkinson rod, dynamic testing technology, applied in the field of testing and research of mechanical properties and failure characteristics, can solve problems such as inability to carry out and cannot truly reflect dynamic response, achieve fast and accurate positioning, center installation, and eliminate dispersion effects and the effect of inertial effects
Active Publication Date: 2021-08-31
SHENZHEN UNIV
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Problems solved by technology
When testing the existing Hopkinson bar device, small-sized (usually sample diameter ≤ 50mm) samples are used. It is considered that the dynamic response of the test sample is isotropic and uniform, and cannot truly reflect the dynamic response of real rock, concrete and other materials.
In addition, the existing Hopkinson bar device technology can only carry out research on the dynamic characteristics of rock and concrete under one-dimensional impact loading or pre-added static confining pressure. However, in actual engineering, rock, concrete, etc. Materials are not only subjected to impact loads in one direction, but also impact loads in biaxial or triaxial and six directions. The existing device technology cannot carry out dynamic impact test research under such working conditions.
Method used
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Embodiment Construction
[0020]The present invention will be further described below in conjunction with the accompanying drawings.
[0021] attached figure 1 It is a three-dimensional diagram of the Hopkinson beam beam system. The test device is placed on the horizontal cross support platform, which is composed of X + To support platform 1, X - To support platform 16, Y + To support platform 21 and Y - Consists of facing support platform 31 and center support platform 61. Center cube square case 59 upper surfaces (along Z + To) fully open, along the X + to, X - to, Y + to, Y - direction, and Z - A square opening is set at the middle position of the central cube square box 59 respectively, and the size of the square opening is the same as the size of the beam bar; The cross coordinate system is used for precise positioning and alignment of the three-axis six-direction beam beam system. Take the central cubic box 59 as the center of symmetry, and arrange X respectively symmetrically. + to, ...
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The invention provides a dynamic test system for Hopkinson beam rods, which includes a horizontal cross support platform, a central cubic box, beam rods, beam rod fixation and a support frame; the beam rods in the X direction and the Y direction are placed horizontally, and the Z The direction beams are placed vertically, and each small-sized single rod is neatly bundled symmetrically through the beam rod fixing and support frame to form a larger-sized square beam rod; 1 mm to 2 mm is reserved between each single rod The gaps, the resistance strain gauges are pasted on each single rod, the cross-sectional area and length of each beam rod are equal, and the internal dynamic stress wave propagation law and dynamic response signal monitoring method of each beam rod are the same. The patent of the invention overcomes the shortcoming that the existing Hopkinson bar cannot carry out the dynamic mechanical characteristic test of materials such as large-scale rock or concrete, and makes up for the fact that the existing Hopkinson bar test process cannot effectively obtain the local dynamic stress-strain of the test sample Insufficient response characteristics.
Description
technical field [0001] The invention relates to the dynamic mechanical performance test of materials such as rocks, concrete, polymers, etc., in particular to the test and research of the mechanical properties and damage characteristics of large-scale materials under the condition of dynamic and static combined loading. Background technique [0002] At present, domestic and foreign studies on the dynamic characteristics of materials such as rock and concrete under impact loading mainly rely on Hopkinson rod devices. The existing Hopkinson rod devices at home and abroad are one-dimensional Hopkinson rods, conventional three-axis Kingson Rods, True Triaxial Rock Hopkinson Rods, and 1D Hopkinson Beam Rods. [0003] The existing Hopkinson bar device for testing the impact properties of rock, concrete and other materials at home and abroad has strict requirements on the size of the sample. Usually the diameter and length of the test sample are less than 50mm, and it is impossible...
Claims
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IPC IPC(8): G01N3/307G01N3/02G01N3/06
CPCG01N3/02G01N3/06G01N3/307G01N2203/0048G01N2203/0075G01N2203/0256
Inventor 谢和平赵坚朱建波周韬廖志毅
Owner SHENZHEN UNIV