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Universal device for anchoring end part of FRP (Fiber Reinforced Plastic) rod material test piece and steel sleeve and use method

A general-purpose device and steel sleeve technology, applied in measuring devices, applying stable tension/pressure to test the strength of materials, analyzing materials, etc., can solve the problems of expansion agent leakage, etc., to achieve improved accuracy, simple overall structure, The effect of improving anchorage efficiency

Active Publication Date: 2022-05-13
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, after the FRP bars are fixed on the steel sleeve, the grouting material needs to be injected into the end of the steel sleeve and sealed. The usual sealing method is to seal the lower end of the steel sleeve with adhesive tape. This operation is likely to cause leakage of the expansion agent. Another The first is to make the sealing of the mounting cap matching the steel sleeve, but it is necessary to make different types of mounting caps to adapt to different diameters of FRP rods

Method used

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  • Universal device for anchoring end part of FRP (Fiber Reinforced Plastic) rod material test piece and steel sleeve and use method
  • Universal device for anchoring end part of FRP (Fiber Reinforced Plastic) rod material test piece and steel sleeve and use method
  • Universal device for anchoring end part of FRP (Fiber Reinforced Plastic) rod material test piece and steel sleeve and use method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Such as figure 1 As shown, the present invention is a general device for anchoring the end of the FRP rod test piece and the steel sleeve, including a first rotating mechanism, a plurality of first clamping units, a second rotating mechanism and a central fixing unit;

[0057] The first rotating mechanism comprises a first rotating rod 3, a disc 4, a first rotating wheel 11 fixed on the first rotating rod 3; the first rotating wheel 11 is arranged below the disc 4;

[0058] Each first clamping unit is slidably arranged on the disc 4 for clamping and fixing the steel sleeve 19;

[0059] The second rotating mechanism includes a second rotating rod 14 and a second rotating wheel 13 fixed on the second rotating rod 14; the second rotating rod 14 is sleeved in the first rotating rod 3, and the second rotating wheel 13 is located on the disc 4 In the center, the lower end of the first rotating rod 3 is provided with the second rotating cap 2, and the lower end of the second ...

Embodiment 2

[0068] Such as Figure 9 and Figure 10 As shown, the fixing method of the general device for anchoring the FRP bar specimen end and the steel sleeve described in embodiment 1 may be utilized, comprising the following steps:

[0069] Prepare two steel sleeves 19 and a FRP rod specimen 20;

[0070] Place one of the steel sleeves 19 on the first diameter adjustment mechanism, rotate the second rotary cap 2, make the clamping piece 7 tighten the steel sleeve 19, and tighten the nuts on the first round rod 8 one by one to fix the steel sleeve 19 ;

[0071] Place one end of the FRP rod test piece 20 on the second diameter adjustment mechanism, rotate the first rotating cap 1, make the centered fixing unit clamp the lower end of the FRP rod test piece 20, and tighten the nuts on the second round rod 15 one by one to fix Good FRP rod specimen 20;

[0072] Take off the universal device, in order to avoid the grout from clogging the moving groove 5 and the second arc groove 16, use...

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Abstract

The invention belongs to the technical field of composite material testing, and discloses a fixing device for anchoring the end part of an FRP rod material test piece and a steel sleeve, which comprises a first rotating mechanism, a plurality of first clamping units, a second rotating mechanism and a centering fixing unit, the first rotating mechanism comprises a first rotating rod, a disc and a first rotating wheel fixed on the first rotating rod; the first rotating wheel is arranged below the disc; each first clamping unit is arranged on the disc in a sliding mode and used for clamping and fixing a steel sleeve. The second rotating mechanism comprises a second rotating rod and a second rotating wheel fixed on the second rotating rod; the centering fixing unit is arranged on the second rotating wheel in a sliding manner and is used for centering and fixing the end part of the FRP rod material test piece. The device can improve the anchoring efficiency of the FRP rod material, is suitable for fixing different steel sleeve diameters and rod material diameters, can enable the FRP rod material test piece to be centered at the center of the steel sleeve, can be repeatedly used for multiple times, and saves the test cost.

Description

technical field [0001] The invention belongs to the technical field of composite material testing, and in particular relates to a general device and method for anchoring the end of an FRP rod test piece and a steel sleeve. Background technique [0002] Fiber-reinforced polymer (Fiberrein forced polymer, referred to as FRP) rod is a new type of light-weight, high-strength, corrosion-resistant, fatigue-resistant and non-magnetized material formed by a continuous fiber-reinforced resin matrix, especially the FRP rod along the fiber The tensile and compressive properties in the direction are often used as indicators for its quality control. However, there is a big difference between the FRP bar tensile test and the steel bar tensile test. FRP rods are anisotropic materials, and the strength perpendicular to the fiber direction is a quarter of its tensile strength. Directly clamping the FRP rod tensile specimens in the upper and lower chucks of the testing machine will easily ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/02G01N3/04G01N3/08
CPCG01N3/02G01N3/04G01N3/08
Inventor 高丹盈张涛汤寄予张雨丁冲谷志强
Owner ZHENGZHOU UNIV