Grinding-free fatigue sample strip and fatigue test method thereof

A fatigue test and grinding-free technology, which is applied in the direction of applying repetitive force/pulsation force to test the strength of materials, measuring devices, instruments, etc., can solve problems such as uneven stress distribution, impact on the accuracy of test results, and results that need to be improved to achieve Accurate effect on fatigue data

Inactive Publication Date: 2020-03-17
上海艾柯检测科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The waist of the existing fatigue spline is cut by CNC, and the fibers in the waist of the fatigue spline will be cut off after cutting, so that the mechanical properties inside the material will change, and the stress distribution on the main body will be uneven, which will affect the accuracy of the test results. The degree has had some impact, and the results after the test need to be improved

Method used

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  • Grinding-free fatigue sample strip and fatigue test method thereof
  • Grinding-free fatigue sample strip and fatigue test method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A grinding-free fatigue spline, such as figure 1 and figure 2 As shown, it includes an integral injection-molded waist body 1, the waist body 1 is in the shape of a strip, and the waists on both sides of the waist body 1 are provided with inwardly concave arcs 2, and the arcs 2 on both sides are in the shape of a shaft. Symmetrical setting. Both ends of the waist body 1 in the length direction are fixedly connected with clamping gaskets 4 through the adhesive layer 3, and the clamping gaskets 4 can be made of resin. The clamping pads 4 are located on opposite sides of the end of the waist body 1 , and the sides of the clamping pads 4 are aligned with the sides of the arc portion 2 and are also arc-shaped.

[0038] The length direction of the sides between the arc parts 2 on the clamping gasket 4 is perpendicular to the length direction of the waist body 1, and the end of the clamping gasket 4 near the center of the waist body 1 is set as a tapered end 401, gradually ...

Embodiment 2

[0042] A fatigue testing method for a grinding-free fatigue spline, comprising the steps of:

[0043] The waist body 1 in the above-mentioned grinding-free fatigue spline is prepared by injection molding.

[0044] Use the adhesive layer 3 to glue the clamping gasket 4 on both sides of the end of the waist circle body 1 in the length direction, and polish the side of the adhesive gasket to be flush with the side edge of the waist circle body 1 .

[0045] Uniformly distributed grooves 301 are ground on the side of the adhesive layer 3 .

[0046] Use fatigue testing equipment to clamp the clamping gaskets 4 at both ends of the vertically placed girdle body 1 , and use a soft abutting piece to press against the middle part of the girdle body 1 . Among them, the fatigue testing equipment first clamps the lower end of the waist body 1 placed vertically, and then clamps the upper end of the waist body 1. When the lower end is clamped but not the upper end, it can be seen whether the...

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Abstract

The invention relates to the technical field of material detection, and discloses a grinding-free fatigue sample strip and a fatigue test method thereof. The grinding-free fatigue sample strip comprises a waist-shaped round main body which is integrally formed in an injection molding mode, inwards-concave arc-shaped parts are formed in waist portions of both sides of the waist-shaped round main body, clamping gaskets are glued to the two ends of the waist-shaped round main body in the length direction thereof, and the side edges of the clamping gaskets are aligned with the side edges of the arc-shaped parts. The end portions, close to the center of the waist-shaped round main body, of the clamping gaskets are configured to be gradually-reduced ends, and the width of each gradually-reducedend is gradually reduced and the thickness of the same is gradually thinned in the direction close to the center of the waist-shaped round main body; the tested waist-shaped round main body does not need to be grinded, instead the clamping gaskets are grinded, thus fiber filaments or a fiber net in the waist-shaped round main body are / is not damaged, therefore the measured fatigue data of the waist-shaped round main body is more precise, the gradually-shrunk and gradually-thinned clamping gaskets can prevent uneven clamping forces from being applied to the end portions of the waist-shaped round main body by means of fatigue testing equipment when a fatigue test is carried out.

Description

technical field [0001] The invention relates to the technical field of material testing, more specifically, it relates to a grinding-free fatigue spline and a fatigue testing method thereof. Background technique [0002] In the field of wind turbine blade materials, every time a new material blade containing fibers is developed, the fatigue test of the material blade needs to be carried out, and the material blade needs to be made into a fatigue spline to use continuous stretching fatigue Test equipment for testing. [0003] Existing fatigue splines use square long strips, and use CNC to cut out an inwardly concave and symmetrical arc waist on the middle waist. The clamping device on the fatigue testing equipment clamps the two ends of the fatigue spline for Fatigue test. [0004] The waist of the existing fatigue spline is cut by CNC, and the fibers in the waist of the fatigue spline will be cut off after cutting, so that the mechanical properties inside the material will...

Claims

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Application Information

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IPC IPC(8): G01N3/02G01N3/32
CPCG01N3/02G01N3/32G01N2203/0005G01N2203/0017G01N2203/0073G01N2203/0282
Inventor 周小华
Owner 上海艾柯检测科技有限公司
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