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Shearing clamp and method for measuring material shearing performance and deformation using same

A measurement method and technology of deformation, applied in the direction of using stable shear force to test the strength of materials, analyzing materials, measuring devices, etc. question

Pending Publication Date: 2019-01-18
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] From the current shear test, there are relatively few devices that are suitable for both square specimens and circular specimens and have single shear and double shear; especially for conventional double shear devices, it is necessary to do a series of shear Part of the deformation research is not easy to achieve, and when shearing micro-samples, it is easy to cause torsion and shaking to cause shear distortion
For example, the patent No. 201520318 303.8 of the patent "Double Shear Test Fixture", although the design is simple, but the scope of application is relatively small, the front and rear directions of the device are not restricted, and for samples smaller than the shear hole, it is easy to produce Shaking, resulting in shear distortion, and for partially deformed but unbroken specimens, the grip cannot remove the specimen
For the patent No. 201710186459.9, the scope of application of this method is small, and the shearing fixture is designed according to the size of different samples, which has relatively large limitations, and there is no device for fastening the sample, which may easily lead to shear distortion
However, in the literature "Shi Peilei, Zhongliangwei, Luo Yingping. Design of single-sided and double-sided shear test device[J]. The two cross-sections of the pin break at the same time, which is easy to cause distortion, and the fixture can only be used for the complete fracture of the sample, and it cannot study the partial deformation of the sample, which has limitations.
For the typical pin shear test fixture recommended in the national standard GB / T 13683 1992, although the dovetail groove shear test fixture has some advantages, but the scope of application is relatively small, and when doing some deformation research, the sample cannot be taken out. Certain limitations

Method used

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  • Shearing clamp and method for measuring material shearing performance and deformation using same
  • Shearing clamp and method for measuring material shearing performance and deformation using same
  • Shearing clamp and method for measuring material shearing performance and deformation using same

Examples

Experimental program
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Effect test

Embodiment 1

[0123] A kind of shear fixture, it is made of 2 parts: outer fixture 9 and inner fixture 3; Wherein: outer fixture 9 is mainly made of base part 1 (such as figure 1 shown) and function 2 (as figure 2 As shown), the overall shape of the functional part 2 is a cuboid structure, and a square through hole 23 is arranged on it along the length direction of the cuboid structure, and the size of the square through hole 23 is matched with the inner fixture 3; so that it can accommodate the inner clamp 3 deep into the square through hole 23;

[0124] The functional part 2 is provided with 4 sides parallel to the length direction, wherein: 2 sides arranged parallel to each other are provided with a through groove 21 passing through the two sides, and the through groove extends to the aforementioned 2 parallel sides. The lower end face of the functional part 2 whose sides are vertical at the same time, and the lower end face of the functional part 2 is divided into two relatively indep...

Embodiment 2

[0157] A kind of shear fixture and its material shear performance and deformation measurement method, through the above described shear sample fixture (suitable for various shapes of sample samples and can be stretched and compressed to realize shearing) to TC11 titanium Alloys were tested for shear properties.

[0158] TC11 titanium alloy is a typical α+β type duplex titanium alloy (nominal composition: Ti-6.5Al-3.5Mo-1.5Zr-0.3Si(wt.%)), which has good comprehensive mechanical properties and is a Important aviation and aerospace materials are widely used in parts such as blades of aero-engines, compressor discs, and some structural parts of aircraft.

[0159] The single and double shearing devices are made of T10 steel (hardness 60HRC), and the fastening bolts are 10.9 high-strength bolts, and the bolt material is 20MnTiB. Figure 1-3 Carry out shearing device processing, wherein the width of the square slot hole of the inner fixture is W=10mm, the thickness B=8mm, the upper...

Embodiment 3

[0180] The content of this embodiment is basically the same as that of embodiment 2, the difference being that: according to the shear test process described in embodiment 1, the shearing device is used to carry out the double shear of part shear deformation control to TC4 titanium alloy. test.

[0181] The composition of titanium alloy TC4 material is Ti-6Al-4V, which belongs to (α+β) type titanium alloy and has good comprehensive mechanical and mechanical properties. Same as embodiment 1, wherein the width W=10mm of the square slot hole of the inner fixture, the thickness B=8mm, the upper bottom surface of the right-angled trapezoidal hole of the outer fixture is W×B, the lower bottom surface is W×(B+1), and the circular hole The diameter D = 6mm.

[0182] Then adopt the same shear process as in Example 1, and the difference from the shear test of the TC11 titanium alloy is that a series of shear deformation tests are performed on the TC4 titanium alloy this time, 10%, 20%,...

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Abstract

A shearing clamp, consisting of two parts, that are an outer clamp (9) and an inner clamp (3). The outer clamp (9) is mainly composed of a base part (1) and a function part (2). The upper part of thefunction part (2) is provided with the base part (1) which forms a fixed connection relationship with it. The inner clamp (3) is provided with inner clamp through holes (32) adaptive to through holes(22) in the shape and the size and is coaxial with the through holes (22) after assembly. An experiment sample piece (8) to be sheared is placed inside hole cavities formed by communicating the through holes (22) and the inner clamp through holes (32). The invention further provides a method for measuring material shearing performance and deformation using the shearing clamp. In conclusion, the invention provides a shearing clamp with high operability, and provides a method for measuring material shearing performance and deformation using the same. The technical scheme is standard and reasonable; the technical effects are excellent, and it has the expected huge economic value and social value.

Description

Technical field: [0001] The invention relates to the technical field of design and application of a shear test jig for material mechanics, and in particular provides a shear jig and a method for measuring shear performance and deformation of a material using the same. Background technique: [0002] In the prior art, in actual engineering applications, many parts will fail due to many factors, such as shearing, stretching, extrusion, torsion, etc. will lead to the failure of parts, among which the damage of shearing is the most serious, most Part of the failure of parts is related to shear, such as bolts, safety pins and rivets. Therefore, the shear test is an important indicator for analyzing the mechanical properties of materials. The shear test is mainly carried out on a universal testing machine. It is mainly divided into single shear and double shear. The shear force of single shear acts on one section of the part, and the shear force of double shear acts on two section...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/04G01N3/24
CPCG01N3/04G01N3/24G01N2203/0025G01N2203/04
Inventor 李阁平张英东刘承泽袁福森韩福洲穆罕默德·阿里顾恒飞
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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