Fracture test device with double-material interface

A fracture test, dual-material technology, applied in the direction of measuring devices, analyzing materials, and testing the strength of materials by applying a stable shear force, which can solve the problem that the deviation angle is not easy, the theoretical derivation is not easy, and the test operability is not strong, etc. problems, to achieve the effect of convenient experimental research

Inactive Publication Date: 2009-09-02
SOUTHEAST UNIV
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Problems solved by technology

The limitations of this method are: 1. The offset angle of FRP is not easy to measure and control, and naturally it is not easy to obtain the corresponding theoretical derivation; 2. This method is only suitable for small eccentric loading
The disadvantages of this method are: first, the fabrication of the components is complicated, and the operability of the test is not strong; second, the cost of the test is high, and it is not suitable to do too many components for linear regression, and only a qualitative analysis can be done

Method used

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  • Fracture test device with double-material interface
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  • Fracture test device with double-material interface

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Embodiment Construction

[0024] The technical scheme adopted by the present invention consists of two parts: the test of the sliding mode and the mixed mode. When the ejector system of the device does not deflect the fiber composite, the test belongs to the slip type test mode; when the ejector system of the device causes the fiber composite to deviate, the test belongs to the hybrid test mode. Using the test device, the tester can quickly and accurately obtain the side shift of the fiber composite material in the hybrid test mode. In the test using this device, the fiber composite material with a composite fiber Bragg grating is used as material one, which can accurately reflect the strain distribution of the fiber composite material in the length direction. The strain of the cracked fiber composite material is much greater than the strain of the uncracked fiber composite material, so there must be a strain mutation at the junction of the cracked and uncracked, and this junction (ie, the strain mutat...

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Abstract

The invention provides a fracture test device with a double-material interface, which comprises a fatigue machine, a bottom plate fixed on the fatigue machine, a second material placed on the bottom plate, a pressure plate placed on the second material, and a first material of which one end is attached to the second material, wherein the fracture test device with the double-material interface also comprises a top plate fixed on the pressure plate and a freely telescopic post rod system placed on the top plate; and the post rod system comprises a support rod fixed on the top plate, a support block connected to one end of the support rod, and a post rod passing through the support block. The fracture test device with the double-material interface not only can accurately simulate the fracture breakage of a slippage type mode and a hybrid mode of the double-material interface, but also can accurately obtain various key parameters required by calculating the fracture energy of the fracture mode.

Description

technical field [0001] The invention relates to a test device, in particular to a fracture test device for a double-material interface. Background technique [0002] Fiber composite materials (namely FRP) have the advantages of high strength, light weight, corrosion resistance, fatigue resistance, convenient construction, etc., and are widely used in the field of civil engineering reinforcement. The concrete structure and steel structure can be strengthened in terms of bending resistance, shear resistance and earthquake resistance through the FRP external bonding method, so that the durability of the structure can be enhanced. However, in the strengthened structure, the peeling failure between the FRP and the concrete (or steel structure) interface often occurs before the strength failure of the component occurs. This problem has been puzzling a large number of research scholars at home and abroad. Scholars at home and abroad have tried to explain its failure mechanism wit...

Claims

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Application Information

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IPC IPC(8): G01N3/00G01N3/20G01N3/24
Inventor 潘金龙曹双寅安峰辰
Owner SOUTHEAST UNIV
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