CN106769433A - Composite bends and interlayer shear sample fast fixture - Google Patents
Composite bends and interlayer shear sample fast fixture Download PDFInfo
- Publication number
- CN106769433A CN106769433A CN201710205008.5A CN201710205008A CN106769433A CN 106769433 A CN106769433 A CN 106769433A CN 201710205008 A CN201710205008 A CN 201710205008A CN 106769433 A CN106769433 A CN 106769433A
- Authority
- CN
- China
- Prior art keywords
- support base
- support
- sample
- block
- adjusting pad
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0023—Bending
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0025—Shearing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/04—Chucks, fixtures, jaws, holders or anvils
Abstract
A kind of bending of composite and interlayer shear sample fast fixture, solve sample adjust present in process of the test it is inconvenient, the problems such as cannot ensure in position pair, including sample is assembled in positioning adjustment component and support base on testing machine, be characterized in that：Positioning adjustment component is made up of spacing catch, support block, adjusting pad and sliding block；Spacing catch is fixed in support block, support block is connected by back-moving spring with sliding block, sliding block T stage is engaged with support base T-shaped slideway, it is assembled between the baffle plate at support base two ends using adjusting pad and thrust spring, being arranged on the adjusting pad between two sliding blocks, to be engaged grafting by positioning table and the locating slot of support base spacing；Support base bottom is connected by location guide with lower platform.Its reasonable in design, sample position centering operation is easy, and support span is easy to adjust, quick, and the switching of bend test and interlayer shear-strength test is rapid, so as to improve test efficiency, it is ensured that the accuracy of experimental result.
Description
Technical field
The present invention relates to a kind of sample support fixture for testing machine for mechanical properties, it is particularly a kind of both can be quickly complete
Into the adjustment of the support span of all size sized samples, different shape loading ram axis and the centering of sample center can be met again
It is required that composite bending and interlayer shear sample fast fixture.The fixture is particularly suited for high-low-temperature environmental testing.
Background technology
Application of the composite in the fields such as Aero-Space, automobile making is more and more extensive.In testing machine for mechanical properties
On carry out composite bend test and interlayer shear-strength test, rectangular strip sample is all typically fixed on experiment using support fixture
On the lower platform of machine, load to form the load mode of three-point bending and carry out the experiment of performance by seaming chuck.It is curved that experiment is measured
The performance parameter of bent and interlayer shear, is all important examination in the selection, design, processing and application process for composite
Index.In process of the test, testing crew should be positioned using loading seaming chuck of different shapes and support fixture to sample, also
Specification according to sample is come the support span of alignment jig.Bend test and interlayer shear-strength test substantially belong at 3 points
Bend test, the simply size of sample size required by them, the adjustment of seaming chuck shape and positioning support span is different.
Therefore, often both fixtures tested are united, is switched in both test types.According to patent literature, such as specially
A kind of " three point bending test device " of sharp Publication No. CN 105547828A, disclosed structure is one kind by around itself axle
Pressure head and the effect of upper rotating shaft that line is rotated, it is intended to automatic corrective action force direction is reached, to prevent the mesh of stress raisers
's.But the installation, adjustment because of its sample are cumbersome, and cannot ensure the depth of parallelism of sample and the centering of position, to experiment
Efficiency and measure the accuracy of data and all have a certain impact.It is the " a kind of to improve multiple of CN 102141489A in patent publication No.
Condensation material bends the fixture with interlaminar shearing test efficiency " in, the technical scheme of record is to make ball wire by the rotation of crank
Bar is rotated, the sliding block side-to-side movement that drive is connected with leading screw, so as to realize the adjustment to span.The fixture overall volume is larger,
Span is adjusted along with also needing to rotate crank, therefore using very inconvenient in narrow and small high and low temperature environment case.And
The fixture cannot ensure that the accurate centering in the position of sample, the i.e. center of sample will be fully located on the loading axis of seaming chuck.Such as
The position of fruit sample is inclined or oblique all to produce large effect to result of the test, so as to reduce the accurate of result of the test
Property.
The content of the invention
It is an object of the invention to provide a kind of bending of composite and interlayer shear sample fast fixture, fundamentally solve
Sample adjusts present in process of the test inconvenience, position pair cannot be ensured in the problems such as, its reasonable in design, sample position
Put centering operation easy, support span easy to adjust, quick, the switching of bend test and interlayer shear-strength test is rapid, so as to carry
Test efficiency high, it is ensured that the accuracy of experimental result.
The technical solution adopted in the present invention is：The composite bends and interlayer shear sample fast fixture includes trying
Sample is assembled in positioning adjustment component and support base between the seaming chuck of testing machine for mechanical properties and lower platform, technical points
It is：The positioning adjustment component is by the spacing catch of support sample, the support block with boss, the adjusting pad of adjustment span and cunning
Block is constituted；Spacing catch is fixed in support block using regulating bolt, and support block is fixedly connected with a slide block by back-moving spring, sliding
The T stage of block bottom is engaged with the T-shaped slideway of support base, and the gear at support base two ends is assembled in using adjusting pad and thrust spring
Between plate, it is arranged on the adjusting pad between two sliding blocks and passes through the positioning table of bottom and be arranged on support base upper surface center
Locating slot to be engaged grafting spacing；Support base bottom is connected by the location guide with locking nut and lower platform.
Positioning groove center with adjusting pad bottom positioning table coordinates the spacing support base upper surface of grafting, is centered in
On the axis of pressure head.
It is fixed on the baffle plate at support base two ends using fastening bolt and is respectively arranged with the spacing of support thrust spring
Post.
The thrust spring being fixed between sliding block limited post and support base two ends baffle limiting post promotes sliding block along T-shaped
Slideway reciprocatingly slides, in order to unclamping and compressing the adjusting pad being arranged between two sliding blocks.
The support block is respectively provided with the steady pin of mounting back-moving spring with sliding block both sides.
The present invention has the advantage that and good effect is：Due to the present invention using unique structure by the spacing of support sample
The positioning adjustment component and support base of catch, the support block with boss, the adjusting pad of adjustment span and sliding block composition, will try
Sample is assembled between the seaming chuck of testing machine for mechanical properties and lower platform, so its reasonable in design, sample position centering behaviour
Make easy, support span is easy to adjust, quick, the switching of bend test and interlayer shear-strength test is rapid, so as to improve experiment
Efficiency, it is ensured that the accuracy of experimental result.Its reason is that：It is provided with the sliding block of positioning adjustment component dismountable
Support block with spacing catch and boss, by change support block can and meanwhile meet bending and interlayer shear-strength test will
Ask, expand the use scope of fixture.Sliding block, can be along support base T-shaped in the presence of the thrust spring of support base baffle plate two ends
Slideway reciprocatingly slides, and the adjusting pad being arranged between two sliding blocks is unclamped and compress, in order to change the tune of different size span
Whole pad.It is spacing that positioning table below adjusting pad is engaged grafting with the locating slot of support base, two in the presence of thrust spring
Sliding block is compressed with adjusting pad, you can conveniently complete to load sample the adjustment of span, such that it is able to be applied to different chis
The experiment of very little sample.There is the spacing catch for ensureing the sample depth of parallelism in support block, examination can be accurately placed at the trial
Sample, it is easy to realize being loaded the centering Fast Installation of sample.Therefore, the present invention fundamentally solves sample in process of the test
Present in adjust inconvenience, the problems such as position centering cannot be ensured.
Because of fixture volume compact compared with similar products, it is easy to be loaded sample position centering operation, bend test and
The switching of interlayer shear-strength test is rapid, therefore can both be used in normal temperature environment, can be used in high and low temperature environment case again.
Brief description of the drawings
Below in conjunction with accompanying drawing, the invention will be further described.
Fig. 1 is a kind of dimensional structure diagram of the invention；
Fig. 2 is a kind of planar structure schematic diagram of Fig. 1；
Fig. 3 is sectional views of the Fig. 2 along line A-A；
Fig. 4 is the structural representation of support base in Fig. 1；
Fig. 5 is the sliding block of present clip and the structural representation of support block；
Fig. 6 is the structural representation of spacing catch in present clip；
Fig. 7 is the structural representation of adjusting pad in present clip.
Number explanation in figure：1 support base, 2 sliding blocks, 3 baffle plates, 4 fastening bolts, 5 thrust springs, 6 support blocks, 7 regulation spiral shells
Bolt, 8 spacing catch, 9 seaming chucks, 10 samples, 11 adjusting pads, 12 positioning tables, 13 locking nuts, 14 location guides, 15 tense bullet
Spring, 16 steady pins, 17 T-shaped slideways, 18 locating slots, 19 bolts hole, 20 T stages, 21 limited posts, 22 adjustment holes, 23 angular limits
Position gear.
Specific embodiment
Concrete structure of the invention is described in detail according to Fig. 1~7.The composite bends and interlayer shear sample fast clamp
Tool includes being assembled on sample 10 seaming chuck 9 and lower platform of testing machine for mechanical properties（Not shown in figure）Between positioning adjustment
Component and the grade parts of support base 1.Wherein spacing catch 8 of the positioning adjustment component by support sample 10, the support with boss
The part compositions such as block 6, the adjusting pad 11 of adjustment span and sliding block 2.The center of the upper surface of support base 1 is provided with positioning centering
Groove 18, the bottom of support base 1 is connected by the location guide 14 with locking nut 13 with lower platform.
The adjustment hole 22 with strip is provided with spacing catch 8 in positioning adjustment component and sample setting position is kept
Angular limiting block 23, and using being tightened on regulating bolt 7 in bolt hole 19, by spacing catch 8 be fixed on support block 6 by
On the position of sample requirement setting.Support block 6 is respectively provided with the steady pin 16 of mounting back-moving spring 15, support with the both sides of sliding block 2
Block 6 is fixedly connected by back-moving spring 15 with sliding block 2, in order to change support block 6 according to requirement of experiment.Using fastening bolt 4
It is fixed on the baffle plate 3 at the two ends of support base 1 and is respectively arranged with the limited post of support thrust spring 5.The T stage 20 of the bottom of sliding block 2
It is engaged with the T-shaped slideway 17 of support base 1, sliding block 2 is assembled in the two ends of support base 1 using adjusting pad 11 and thrust spring 5
Between baffle plate 3.The adjusting pad 11 between two sliding blocks 2 is arranged on to pass through the positioning table 12 of bottom and be arranged on the upper table of support base 1
It is spacing that the locating slot 18 of face center is engaged grafting.Coordinate the spacing support base of grafting with 11 bottom positioning table of adjusting pad 12
The center of locating slot 18 of 1 upper surface, is centered on the axis of seaming chuck 9, to ensure to be loaded the accurate centering in position of sample 10.
The thrust spring 5 being fixed between 1 liang of limited post of end-stopping plate 3 of the limited post 21 of sliding block 2 and support base promotes sliding block 2 along T-shaped slideway
17 reciprocatingly slide, and the adjusting pad 11 being arranged between two sliding blocks 2 can be unclamped and compress, in order to more according to actual needs
Change the adjusting pad 11 of different size span.
When experiment, two sliding blocks 2 and adjusting pad 11 being pressed together tightly in the presence of thrust spring 5.Adjustment
During span, two sliding blocks 2 are pushed aside with hand, you can place the adjusting pad 11 of different size span in the upper surface of support base 1, make tune
The positioning table 12 of the bottom of whole pad 11 is plugged in together with the cooperation of locating slot 18 of support base 1, two in the presence of thrust spring 5
Sliding block 2 is compressed with adjusting pad 11, you can realize loading sample 10 the quick adjustment of span.
Band boss support block 6 is fixed on sliding block 2 by back-moving spring 15, by changing with boss support block 6, both can be with
Bend test is carried out, interlayer shear-strength test can be carried out again.Have in support block 6 for ensureing that it is not skewed that sample 10 is accurately positioned
Spacing catch 9.The position of spacing catch 9 can be adjusted before experiment according to the size of sample 10, sample 10 is thereby may be ensured that
The accuracy of placement.
The specific work process of the fixture is：
First according to test type select support block 6, support block 6 is fixed on sliding block 2 with back-moving spring 15, then further according to
The size selection different size of sample 10 loads the adjusting pad 11 of span.Before adjustment span, two pieces of sliding blocks 2 are in two ends back-moving spring
It is closely packed together under 15 promotion, sliding block 2 is unclamped during adjustment span, and the adjusting pad selected according to the span of required size
11 are placed on support base 1, the positioning table 12 of the bottom of adjusting pad 11 is coordinated with the locating slot 18 of support base 1 and are plugged in together, i.e.,
The adjustment of complete back-to-back test span.The position of the upper limit catch 8 of support block 6 is adjusted again, to ensure the alignment degree that sample 10 is placed
And the depth of parallelism.Finally selection is appropriate to the seaming chuck 9 of experiment, you can start experiment.
Claims (5)
1. a kind of composite is bent and interlayer shear sample fast fixture, including sample is assembled in into testing machine for mechanical properties
Positioning adjustment component and support base between seaming chuck and lower platform, it is characterised in that：The positioning adjustment component is by supporting
The spacing catch of sample, the support block with boss, the adjusting pad of adjustment span and sliding block composition；Spacing catch is utilized and adjusts spiral shell
Bolt is fixed in support block, and support block is fixedly connected with a slide block by back-moving spring, the T stage of slider bottom and the T of support base
Shape slideway is engaged, and is assembled between the baffle plate at support base two ends using adjusting pad and thrust spring, be arranged on two sliding blocks it
Between adjusting pad to be engaged grafting with the locating slot for being arranged on support base upper surface center by the positioning table of bottom spacing；
Support base bottom is connected by the location guide with locking nut and lower platform.
2. composite according to claim 1 bends and interlayer shear sample fast fixture, it is characterised in that：With adjustment
Rebasing portion's positioning table coordinates the positioning groove center of the spacing support base upper surface of grafting, is centered on the axis of seaming chuck.
3. composite according to claim 1 bends and interlayer shear sample fast fixture, it is characterised in that：Using tight
Fixing bolt is fixed on the baffle plate at support base two ends the limited post for being respectively arranged with support thrust spring.
4. the composite according to claim 1 or 3 bends and interlayer shear sample fast fixture, it is characterised in that：Gu
Being scheduled on the thrust spring between sliding block limited post and support base two ends baffle limiting post promotes sliding block back and forth to be slided along T-shaped slideway
It is dynamic, in order to unclamping and compressing the adjusting pad being arranged between two sliding blocks.
5. composite according to claim 1 bends and interlayer shear sample fast fixture, it is characterised in that：The branch
Bracer is respectively provided with the steady pin of mounting back-moving spring with sliding block both sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710205008.5A CN106769433A (en) | 2017-03-31 | 2017-03-31 | Composite bends and interlayer shear sample fast fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710205008.5A CN106769433A (en) | 2017-03-31 | 2017-03-31 | Composite bends and interlayer shear sample fast fixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106769433A true CN106769433A (en) | 2017-05-31 |
Family
ID=58965557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710205008.5A Pending CN106769433A (en) | 2017-03-31 | 2017-03-31 | Composite bends and interlayer shear sample fast fixture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106769433A (en) |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107063853A (en) * | 2017-06-16 | 2017-08-18 | 哈尔滨工业大学 | A kind of fixture for v-notch beam sample testing shear performance |
| CN107631930A (en) * | 2017-09-28 | 2018-01-26 | 中国航发动力股份有限公司 | A kind of composite interlayer shearing test clamp |
| CN107976362A (en) * | 2017-12-20 | 2018-05-01 | 上海交通大学 | three-point bending fixture |
| CN109142042A (en) * | 2018-07-20 | 2019-01-04 | 燕山大学 | Combined type just dismounts mechanical property tests fixture |
| CN109738300A (en) * | 2018-10-31 | 2019-05-10 | 中国飞机强度研究所 | A kind of curved scissors combination test apparatus of pin shaft base part |
| CN109991069A (en) * | 2019-04-22 | 2019-07-09 | 河南工业大学 | A kind of counter-force pedestal production method and loading hole unit adjust device |
| CN110376050A (en) * | 2019-07-05 | 2019-10-25 | 江苏省镔鑫钢铁集团有限公司 | A kind of steel end-quenched positioning device |
| CN111157329A (en) * | 2020-02-12 | 2020-05-15 | 上海交通大学 | Low-temperature CTOD testing device and method |
| CN111929176A (en) * | 2020-06-30 | 2020-11-13 | 湖州和通电梯部件有限公司 | Bending resistance detection device is used in elevator guide rail production |
| CN112097976A (en) * | 2020-08-11 | 2020-12-18 | 国家电网有限公司 | Fuse formula is experimental auxiliary device of contact clamp force for isolator |
| CN108458926B (en) * | 2018-01-30 | 2021-01-05 | 东南大学 | Thermal rigid single-shaft loading device |
| CN112378780A (en) * | 2020-10-29 | 2021-02-19 | 中国商用飞机有限责任公司北京民用飞机技术研究中心 | Three-point/four-point bending fatigue testing method and device for composite material |
| CN112665966A (en) * | 2020-12-15 | 2021-04-16 | Oppo（重庆）智能科技有限公司 | Precision controller |
| CN113029942A (en) * | 2021-03-12 | 2021-06-25 | 上海交通大学 | Single-interface bonding strength evaluation test method |
| CN113155604A (en) * | 2021-03-22 | 2021-07-23 | 东南大学 | Portable multifunctional single-column mechanical property testing machine and testing method |
| CN113776958A (en) * | 2021-09-18 | 2021-12-10 | 中车株洲电力机车有限公司 | Roller type bending device for bending test |
| CN114371071A (en) * | 2021-12-31 | 2022-04-19 | 核工业西南物理研究院 | Dual-purpose test fixture for three-point bending and shearing of small sample |
| CN110376050B (en) * | 2019-07-05 | 2024-04-19 | 江苏省镔鑫钢铁集团有限公司 | End quenching sample positioning device |
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| JPH10142130A (en) * | 1996-11-11 | 1998-05-29 | Juzo Maekawa | Flexure measuring apparatus using floating measuring frame in bending test by material testing machine |
| CN102141489A (en) * | 2010-12-13 | 2011-08-03 | 中国航空工业集团公司北京航空材料研究院 | Clamp improving bending and interlaminar shearing test efficiency of composite material |
| CN102706740A (en) * | 2012-06-28 | 2012-10-03 | 济南科汇试验设备有限公司 | Ceramic bending clamp with variable span |
| CN103760037A (en) * | 2014-01-23 | 2014-04-30 | 湖南大学 | Bearing-type damage biomechanic three-point bending test device and bearing-type damage biomechanic three-point bending method |
| CN104535414A (en) * | 2014-12-16 | 2015-04-22 | 中国航空工业集团公司北京航空材料研究院 | Shear test fixture |
| CN206804418U (en) * | 2017-03-31 | 2017-12-26 | 沈阳盛远检测技术有限公司 | Composite is bent and interlayer shear sample fast fixture |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH10142130A (en) * | 1996-11-11 | 1998-05-29 | Juzo Maekawa | Flexure measuring apparatus using floating measuring frame in bending test by material testing machine |
| CN102141489A (en) * | 2010-12-13 | 2011-08-03 | 中国航空工业集团公司北京航空材料研究院 | Clamp improving bending and interlaminar shearing test efficiency of composite material |
| CN102706740A (en) * | 2012-06-28 | 2012-10-03 | 济南科汇试验设备有限公司 | Ceramic bending clamp with variable span |
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| CN206804418U (en) * | 2017-03-31 | 2017-12-26 | 沈阳盛远检测技术有限公司 | Composite is bent and interlayer shear sample fast fixture |
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107063853A (en) * | 2017-06-16 | 2017-08-18 | 哈尔滨工业大学 | A kind of fixture for v-notch beam sample testing shear performance |
| CN107063853B (en) * | 2017-06-16 | 2023-08-11 | 哈尔滨工业大学 | Clamp for testing shear performance of V-shaped notch beam sample |
| CN107631930A (en) * | 2017-09-28 | 2018-01-26 | 中国航发动力股份有限公司 | A kind of composite interlayer shearing test clamp |
| CN107976362A (en) * | 2017-12-20 | 2018-05-01 | 上海交通大学 | three-point bending fixture |
| CN108458926B (en) * | 2018-01-30 | 2021-01-05 | 东南大学 | Thermal rigid single-shaft loading device |
| CN109142042A (en) * | 2018-07-20 | 2019-01-04 | 燕山大学 | Combined type just dismounts mechanical property tests fixture |
| CN109142042B (en) * | 2018-07-20 | 2020-08-28 | 燕山大学 | Combined type mechanical property experiment clamp convenient to disassemble and assemble |
| CN109738300A (en) * | 2018-10-31 | 2019-05-10 | 中国飞机强度研究所 | A kind of curved scissors combination test apparatus of pin shaft base part |
| CN109991069A (en) * | 2019-04-22 | 2019-07-09 | 河南工业大学 | A kind of counter-force pedestal production method and loading hole unit adjust device |
| CN110376050A (en) * | 2019-07-05 | 2019-10-25 | 江苏省镔鑫钢铁集团有限公司 | A kind of steel end-quenched positioning device |
| CN110376050B (en) * | 2019-07-05 | 2024-04-19 | 江苏省镔鑫钢铁集团有限公司 | End quenching sample positioning device |
| CN111157329A (en) * | 2020-02-12 | 2020-05-15 | 上海交通大学 | Low-temperature CTOD testing device and method |
| CN111929176A (en) * | 2020-06-30 | 2020-11-13 | 湖州和通电梯部件有限公司 | Bending resistance detection device is used in elevator guide rail production |
| CN112097976A (en) * | 2020-08-11 | 2020-12-18 | 国家电网有限公司 | Fuse formula is experimental auxiliary device of contact clamp force for isolator |
| CN112378780A (en) * | 2020-10-29 | 2021-02-19 | 中国商用飞机有限责任公司北京民用飞机技术研究中心 | Three-point/four-point bending fatigue testing method and device for composite material |
| CN112665966A (en) * | 2020-12-15 | 2021-04-16 | Oppo（重庆）智能科技有限公司 | Precision controller |
| CN113029942A (en) * | 2021-03-12 | 2021-06-25 | 上海交通大学 | Single-interface bonding strength evaluation test method |
| CN113155604A (en) * | 2021-03-22 | 2021-07-23 | 东南大学 | Portable multifunctional single-column mechanical property testing machine and testing method |
| CN113776958A (en) * | 2021-09-18 | 2021-12-10 | 中车株洲电力机车有限公司 | Roller type bending device for bending test |
| CN113776958B (en) * | 2021-09-18 | 2024-02-06 | 中车株洲电力机车有限公司 | Roller bending device for bending test |
| CN114371071A (en) * | 2021-12-31 | 2022-04-19 | 核工业西南物理研究院 | Dual-purpose test fixture for three-point bending and shearing of small sample |
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