CN205879680U - Small -size tensile anchor clamps to nonstandard sample - Google Patents

Small -size tensile anchor clamps to nonstandard sample Download PDF

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Publication number
CN205879680U
CN205879680U CN201620648933.6U CN201620648933U CN205879680U CN 205879680 U CN205879680 U CN 205879680U CN 201620648933 U CN201620648933 U CN 201620648933U CN 205879680 U CN205879680 U CN 205879680U
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China
Prior art keywords
sample
anchor clamps
fixture
parallel
nonstandard
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Expired - Fee Related
Application number
CN201620648933.6U
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Chinese (zh)
Inventor
张梅
朱德珑
甘斌
冯呈庠
李海阳
纪登鹏
周晓航
姚羿
李麟
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University of Shanghai for Science and Technology
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University of Shanghai for Science and Technology
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Priority to CN201620648933.6U priority Critical patent/CN205879680U/en
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Publication of CN205879680U publication Critical patent/CN205879680U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model provides a small -size tensile anchor clamps to nonstandard sample is divided into anchor clamps and lower anchor clamps two parts, and the one end of upper and lower anchor clamps is passed through the bolt and is fixed on universal tester, and the other end is equipped with the recess, and the recess is the arc surface with the contact surface of nonstandard sample. Upward the distance between anchor clamps and the lower anchor clamps is the parallel segment length of nonstandard sample, and the clearance width of the recess on the upper and lower anchor clamps is the parallel section width of nonstandard sample, the arc surface of recess is tangent with the parallel section of nonstandard sample, the radius of arc surface and the contact surface phase -match of nonstandard sample. The utility model discloses the tensile test of the steel sheet sample that device specially adapted intensity is higher, the size is less provides probably for studying the rolling tensile mechanical properties who tests the back material. Both guaranteed that the sample can not stress concentration when tensile, and also ensured the sample and in parallel section fracture, guarantee the accuracy of experimental result.

Description

A kind of compact tensile fixture for non-standard sample
Technical field
This utility model relates to a kind of compact tensile fixture for non-standard sample, belongs to materials mechanics experimental device technique neck Territory.
Background technology
Tension test refers to measure the test method of material behavior under bearing axial tensile loads, is to measure to weigh material One of mode that performance is main, is the important tool of development and utilization new material.The data utilizing tension test to obtain can be true Determine elastic limit of materials, percentage elongation, elastic modelling quantity, proportional limit, area reduction amount, hot strength, yield point, yield strength With other tensile property index, the tension test at high temperature carried out can obtain creep data.
Along with the development of material science and technology, new material and the appearance of new laboratory facilities, to the survey of material mechanical performance Examination brings new challenge and opportunity.At present, the composition of material is various, and shape size differs, the examination that sample can bear Little to tens lis cattle (such as weaving spandex thread) of power of testing, greatly to tens tons such as common iron etc., the electronic type universal of largest domestic Testing machine test power is 1000KN.The little spun gold to diameter phi 0.005mm of specimen size, the big PVC etc. to diameter 1.5m, This will rooting select to design different fixtures according to the shape size of different test forces, sample.Physical simulation experiment technology profit With little experimental model, under simulation actual condition, the research means of military service is used widely, and this technology not only saves reality Test cost, also shorten experimental period simultaneously.Therefore, develop corresponding mechanics detection instrument and match with physical simulation experiment, Research and development new material tool is of great significance.
For general metal stretching experiment, general employing inclined-plane clamping structure, i.e. along with the increase of test force, clamping force Increase (fixture referring to use inclined-plane locking theory structure) therewith.For bolt-type fixture, it is fixing as folder that sample embeds fixture Clamp force, it is ensured that sample does not skids.
Utility model content
The deficiency existed for prior art, the purpose of this utility model is to provide a kind of draws for the small-sized of non-standard sample Stretch fixture.
For reaching above-mentioned purpose, this utility model adopts the following technical scheme that
A kind of compact tensile fixture for non-standard sample, is divided into fixture and lower clamp two parts, the one of upper lower clamp End is fixed on universal testing machine by latch, and the other end is provided with groove, and groove is arc surface with the contact surface of non-standard sample.
The parallel-segment length that distance is non-standard sample between described upper fixture and lower clamp, the groove on upper lower clamp Gap width is non-standard sample parallel-segment width;The arc surface of groove is tangent with the parallel-segment of non-standard sample, the radius of arc surface Match with the contact surface of non-standard sample.
It is to concentrate in order to avoid sample holder part produces stress with arc groove, thus affects the accurate of experimental result Property.Use the fixture of bolt-type, the steel plate that intensity is higher can be carried out small size sample tension test and can guarantee that sample stretches During will not affect the accuracy of experimental result due to fixture and the machining shape of sample.Go for intensity relatively The tension test of the steel plate sample high, size is less, provides possibility for the tensile mechanical properties of material after research rolling experiment.
Further, since the clamping force that sample relies on arcwall face produces coupling mechanism force, therefore laterally there iing certain displacement, additionally Owing to sample is the least, breaking strain district account for the major part in plastic deformation district, and the elongation percentage therefore measured is higher than standard sample Drafting results.Compared with standard tensile test, occur that the reason of this deviation essentially consists in both gauge length differences.To this end, According to the principle of experimental technique, utilize standard test and design fixture experiment to return the method compared, have modified engineering strain Computing formula:
WhereinThe shift value recorded at the stretching experiment fixture designed for known elongation percentage material, For the elongation percentage obtained from standard specimen and testing machine.For the gauge length revised.
Compared with prior art, this utility model has the advantage that
This utility model device is particularly well-suited to the tension test of the steel plate sample that intensity is higher, size is less, for research After rolling experiment, the tensile mechanical properties of material provides possibility.Both ensure that sample will not be concentrated, the most really by stress when stretching Protect sample to rupture in parallel-segment, it is ensured that the accuracy of experimental result.
Accompanying drawing explanation
Fig. 1 is installation of the present utility model, stretching schematic diagram.
Fig. 2 is the partial enlarged drawing of fixture groove.
Fig. 3 is the comparison diagram of design fixture standard specimen and experiment steel.
Detailed description of the invention
Below in conjunction with the accompanying drawings, specific embodiment of the utility model is described further.
The present embodiment is applied to the CMT5305 universal testing machine with high accuracy displacement sensor and force transducer, for right Small size sample after steel plate that intensity is higher or compression test carries out tension test.
As it is shown in figure 1, a kind of compact tensile fixture for non-standard sample, it is divided into fixture and lower clamp two parts, on One end of lower clamp is fixed on universal testing machine by latch, and the other end is provided with the contact surface of groove, groove and non-standard sample For arc surface, both ensure that sample will not be concentrated by stress when stretching, also ensured that sample ruptured in parallel-segment.
As in figure 2 it is shown, the parallel-segment length that distance is non-standard sample between described upper fixture and lower clamp, upper lower clamp On the gap width of groove be non-standard sample parallel-segment width;The arc surface of groove is tangent with the parallel-segment of non-standard sample, circle The radius of cambered surface matches with the contact surface of non-standard sample.
Use process of the present utility model is as follows:
Sample is cut into specified size and ensures that sample and holder contacts area are more than the long-pending twice of specimen cross section, will folder Tool is assembled on universal testing machine by latch, is then installed in the arc groove of fixture by sample, the effect after sample installation Fruit is as shown in Figure 1.The biggest pulling force can be produced in drawing process, with meet the higher sample of tensile strength stretching experiment want Ask.Testing machine performs the rate of extension of 2cm/min, by data acquisition system displacement and force value data, according to upper The elongation percentage computing formula of the computing formula and correction of stating engineering stress obtains experimental result.
Contrasted by the experimental result of standard specimen on universal testing machine with experiment steel, answering of the data of stretching experiment Stress-strain curve comparison diagram is as shown in Figure 3.

Claims (2)

1. the compact tensile fixture for non-standard sample, it is characterised in that: it is divided into fixture and lower clamp two parts, up and down One end of fixture is fixed on universal testing machine by latch, and the other end is provided with groove, and groove with the contact surface of non-standard sample is Arc surface.
Compact tensile fixture for non-standard sample the most according to claim 1, it is characterised in that: described upper fixture and under Distance between fixture is the parallel-segment length of non-standard sample, and the gap width of the groove on upper lower clamp is that non-standard sample is parallel Duan Kuandu;The arc surface of groove is tangent with the parallel-segment of non-standard sample, and the contact surface of the radius of arc surface and non-standard sample is mutually Join.
CN201620648933.6U 2016-06-28 2016-06-28 Small -size tensile anchor clamps to nonstandard sample Expired - Fee Related CN205879680U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201620648933.6U CN205879680U (en) 2016-06-28 2016-06-28 Small -size tensile anchor clamps to nonstandard sample

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201620648933.6U CN205879680U (en) 2016-06-28 2016-06-28 Small -size tensile anchor clamps to nonstandard sample

Publications (1)

Publication Number Publication Date
CN205879680U true CN205879680U (en) 2017-01-11

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108195679A (en) * 2018-02-11 2018-06-22 东南大学 A kind of device and test method for measuring wire rod tiny sample tensile strength
CN109781527A (en) * 2019-02-13 2019-05-21 滁州职业技术学院 A kind of test specimen and test method for testing concrete sample tensile strength
WO2021021034A3 (en) * 2019-07-26 2021-03-11 Natchrungsunkh Phanawisittha Tensile testing method of small bamboo
CN112540007A (en) * 2020-12-07 2021-03-23 航天特种材料及工艺技术研究所 Method and device for testing high-temperature tensile property of fiber monofilament
CN112730090A (en) * 2020-11-30 2021-04-30 中国原子能科学研究院 Metal material high-temperature tensile elongation marking test device and method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108195679A (en) * 2018-02-11 2018-06-22 东南大学 A kind of device and test method for measuring wire rod tiny sample tensile strength
CN108195679B (en) * 2018-02-11 2020-09-29 东南大学 Device for measuring tensile strength of wire rod micro sample and test method
CN109781527A (en) * 2019-02-13 2019-05-21 滁州职业技术学院 A kind of test specimen and test method for testing concrete sample tensile strength
WO2021021034A3 (en) * 2019-07-26 2021-03-11 Natchrungsunkh Phanawisittha Tensile testing method of small bamboo
CN112730090A (en) * 2020-11-30 2021-04-30 中国原子能科学研究院 Metal material high-temperature tensile elongation marking test device and method
CN112540007A (en) * 2020-12-07 2021-03-23 航天特种材料及工艺技术研究所 Method and device for testing high-temperature tensile property of fiber monofilament

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20170111

Termination date: 20180628

CF01 Termination of patent right due to non-payment of annual fee