CN106840867B - A kind of the drawing by high temperature fatigue test clamper and method of flat test piece - Google Patents
A kind of the drawing by high temperature fatigue test clamper and method of flat test piece Download PDFInfo
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- CN106840867B CN106840867B CN201710217684.4A CN201710217684A CN106840867B CN 106840867 B CN106840867 B CN 106840867B CN 201710217684 A CN201710217684 A CN 201710217684A CN 106840867 B CN106840867 B CN 106840867B
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- 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
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- 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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/18—Performing tests at high or low temperatures
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Abstract
The invention discloses the drawing by high temperature fatigue test clamper and method of a kind of flat test piece, the clamping to flat test piece in hot test is realized, and then can carry out the tensile fatigue test of flat test piece under the high temperature conditions.Fatigue machine hydraulic chuck clamps the optical wand end of central axis, and is connected by sleeve with connecting rod, has fixture nut on central axis, for limiting the downward displacement of sleeve；Connecting rod is screwed with sleeve；Connecting rod is connected through a screw thread with wedge grip body；Central axis passes through the through-hole among connecting rod, and shaft end is connect with guide table；Guide table is located in the groove between two wedge-shaped fixture blocks, for guiding moving up and down for wedge-shaped fixture block；Test specimen is clamped by the wedge-shaped fixture block in wedge grip body, and wedge-shaped fixture block bottom is directed to platform top and withstands, and two sides are contacted with the cleat planes inside wedge grip body, the upward displacement of limitation fixture block.The present invention meets the stable holding of the flat test piece of sizes, and realize its under the high temperature conditions be uniaxially stretched fatigue.
Description
Technical field
The present invention relates to Metal Material Fatigue performance testing equipment, the drawing by high temperature fatigue of especially a kind of flat test piece is tried
Test fixture and method, belong to be metal material uniaxial drawing by high temperature fatigue test clamper design and manufacture field.
Background technique
For needing to carry out under hot conditions, big load, high-frequency, the test requirements document stretched repeatedly, common wedge grip
Tool is not able to satisfy test requirements document, some in fixture because such fixture is less while considering the experimental condition of high temperature and top load
Component is easy that fatigue failure first occurs in fatique testing at elevated temperature.Existing patent document is consulted, discovery can not can solve
The certainly flat test piece high-temperature clamp of the above problem, it is therefore necessary to design a kind of drawing by high temperature fatigue examination suitable for flat test piece
Test fixture.
Utility model CN205898563U devises a kind of for thin-walled flat test piece high frequency fatigue test hydraulic clamping dress
It sets, using hydraulic drive strut, arc surface wedge sliding block is made to compress plate test coupon.The patent is designed for electro-hydraulic press, general
Property is poor, and flat test piece size is limited by clip cover diameter, is not able to satisfy the fatigue test demand of large scale flat test piece.
Patent of invention CN105115819A devises a kind of fatigue test clamper, utilizes the mobile promotion wedge shape knot of lock sleeve
Structure fixture block compresses flat test piece, for testing small specimen fatigue behaviour.The chuck designs are not able to satisfy the examination of large scale plate
The fatigue test demand of part, and the influence of lock sleeve loosening after chronic fatigue test is not considered.
Utility model CN205426656U devises a kind of dual-purpose automatic fixture of HF fatigue testing machine, by using assembling
Form and leadscrew-nut mechanism are realized and are worked the Automatic-clamping of plate and bar test specimen.The chuck designs need to correspond to
The transformation of testing machine body, smaller scope of application, test frequency is lower.And do not consider hot test condition to the shadow of fatigue machine
It rings.
Utility model CN201488914U devises a kind of plate fatigue test fixture, using the jig main body with inclined-plane with
Fixture block cooperation avoids clamping force relaxation during test.The chuck designs do not consider the shadow of hot test condition equally
It rings.
To sum up, the prior art is not able to satisfy flat test piece big load, high-frequency tensile fatigue test under the high temperature conditions
Demand.
Summary of the invention
Present invention solves the technical problem that being：Overcome the deficiencies of the prior art and provide a kind of drawing by high temperature of flat test piece
Fatigue test clamper and method, can stable holding flat test piece, and meet flat test piece (high temperature 800 under high temperature environment
DEG C) tensile fatigue test demand.
The technical solution of the invention is as follows：A kind of drawing by high temperature fatigue test clamper of flat test piece, such as the institute of Fig. 1 and 14
Show, including：Central axis (1), left-handed nut (2), right-handed nut (3), socket bar (4), sleeve (5), connecting rod (6), wedge grip body
(7), guide table (8), wedge-shaped fixture block (9), dormant bolt (10), baffle (11) and flat test piece (12)；
The optical wand end of central axis (1) is clamped by fatigue machine hydraulic chuck；Central axis (1) is connected by screw thread and guide table (8)
It connects；Central axis (1) is inserted in sleeve (5), is threadedly coupled between sleeve (5) and connecting rod (6)；Left-handed nut (2) passes through dextrorotation
Nut (3) is connect with central axis (1), for limiting the downward displacement of sleeve (5)；It is screw thread between socket bar (4) and sleeve (5)
Connection drives guide table (8) to move up and down to turnbarrel (5)；It is to be threadedly coupled between connecting rod (6) and wedge grip body (7)；
The wedge-shaped fixture block (9) that flat test piece (12) is located in wedge grip body (7) by two clamps, wedge-shaped fixture block (9) and guide table (8) it
Between connected by groove, and be directed to platform (8) and withstand, the side cleat planes internal with wedge grip body (7) contacts, limit wedge-shaped
The upward displacement of fixture block (9)；Two baffles (11) are threadedly coupled by two dormant bolts (10) with wedge grip body (7), are prevented
Fixture block abjection.
As shown in figure 13, the stretched portion in tensile fatigue test, pulling force pass to central axis by tired machine grip holder
(1), sleeve (5) and by the boss on axis by pulling force are transmitted to；Sleeve (5) is connected through a screw thread with connecting rod (6), thus by pulling force
Connecting rod (6) are passed to；Connecting rod (6), which is connected through a screw thread, passes to wedge grip body (7) for pulling force；It is recessed in wedge grip body (7)
Groove sidewall is contacted with wedge-shaped fixture block (9), so that wedge-shaped fixture block (9) keeps the state compressed；Wedge-shaped fixture block (9) and flat test piece
(12) it contacts, guarantees that flat test piece (12) do not skid by frictional force, carried to realize and be stretched in tensile fatigue test
The application of lotus.
The screw thread that central axis (1) the optical wand end nearby has two sections of rotation directions different, wherein respectively left hand thread and dextrorotation
To eliminate thread pitch, left-handed nut (2) is contacted with each other with right-handed nut (3) for screw thread, right-handed nut (3) and sleeve (5) contact
And it is oppositely oriented, formation is self-locking, prevents right-handed nut in fatigue test (3) from loosening.Guarantee tensile fatigue test middle sleeve (5)
The boss uniform stressed of internal rotary table and central axis (1), the fatigue rupture for preventing discontinuity from occurring.
Wedge-shaped fixture block (9) clamping face is plane, and contact surface inclined-plane is contacted with wedge grip body (7), limits wedge-shaped fixture block (9)
Upward displacement.
The method for carrying out tensile fatigue test using the drawing by high temperature fatigue test clamper of above-mentioned flat test piece, step is such as
Under：
Step 1：In tensile fatigue test, pulling force passes to central axis (1) by the collet of fatigue machine, and passes through center
Pulling force is transmitted to sleeve (5) by the boss on axis (1)；
Step 2：Sleeve (5) is connected through a screw thread with connecting rod (6), so that pulling force has been passed to connecting rod (6)；
Step 3：Connecting rod (6), which is connected through a screw thread, passes to wedge grip body (7) for pulling force；
Step 4：Recess sidewall in wedge grip body (7) is contacted with wedge-shaped fixture block (9), so that wedge-shaped fixture block (9) keeps pressure
Tight state；
Step 5：Wedge-shaped fixture block (9) contacts with flat test piece (12), guarantees that flat test piece (12) do not occur by frictional force
It skids, to realize the application of tensile load in tensile fatigue test.
The advantages of present invention is compared with existing fatigue test clamper scheme is：
(1) present invention realizes the clamping to flat test piece in hot test, and then can carry out under the high temperature conditions
The tensile fatigue test of flat test piece.Fatigue machine hydraulic chuck clamps the optical wand end of central axis, and is connected by sleeve with connecting rod,
There is fixture nut on central axis, for limiting the downward displacement of sleeve；Connecting rod is screwed with sleeve；Connecting rod and wedge grip
Body is connected through a screw thread；Central axis passes through the through-hole among connecting rod, and shaft end is connect with guide table；Guide table is located at two wedge grips
In groove between block, for guiding moving up and down for wedge-shaped fixture block；Test specimen is clamped by the wedge-shaped fixture block in wedge grip body, wedge shape
Fixture block bottom is directed to platform top and withstands, and two sides are contacted with the cleat planes inside wedge grip body, the upward displacement of limitation fixture block.
The present invention meets the stable holding of the flat test piece of sizes, and realize its under the high temperature conditions be uniaxially stretched fatigue.
(2) present invention can be used for tensile fatigue test of flat test piece within the temperature range of room temperature is to 800 DEG C of high temperature.It adopts
Flat test piece is heated with the mode that induction coil heats, the heat of such fixture other positions is transmitted all from heat, due to
Each component of fixture is all made of metal material manufacture, also has higher material property at high temperature, and part dimension is relatively large,
Lower stress level can be kept under fatigue load, therefore fatigue rupture will not occur in fatique testing at elevated temperature.Test
It proves, when carrying out high temperature alloy fatigue test at 800 DEG C, fixture can satisfy requirement.
(3) present invention employs reasonable screw thread self-locking structure, the generation of clamp member fatigue failure is effectively prevented.?
Stretched portion in tensile fatigue test, pulling force passes to central axis by tired machine grip holder, and will be drawn by the boss on axis
Power is transmitted to sleeve；Sleeve is connected through a screw thread with connecting rod, so that pulling force has been passed to connecting rod；Connecting rod, which is connected through a screw thread, to be drawn
Power passes to wedge grip body；Recess sidewall in wedge grip body is contacted with wedge-shaped fixture block, so that wedge-shaped fixture block keeps the shape compressed
State；Wedge-shaped fixture block is contacted with flat test piece, guarantees that flat test piece does not skid by frictional force, to realize tensile fatigue
The application of tensile load in test.The screw thread that central axis optical wand end nearby has two sections of rotation directions different, respectively left hand thread and the right side
Revolving screw thread, to eliminate thread pitch, left-handed nut contacts with each other and oppositely oriented with right-handed nut for right-handed nut and barrel contacts,
It is formed self-locking, right-handed nut is prevented in fatigue test to loosen.Guarantee the inside rotary table and central axis of tensile fatigue test middle sleeve
Boss uniformly contact, prevent discontinuity occur fatigue rupture.
(4) form of the invention is simple, easy to process, simultaneously as heating location is located at flat test piece, conduction to fixture
The heat at central axis optical wand end is seldom, can reduce unnecessary heat transfer to fatigue machine when carrying out fatigue at high temperature experiment.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of present clip；
Fig. 2 is the central axis schematic diagram of present clip, wherein (a) is outside drawing；It (b) is left view；It (c) is vertical view
Figure；It (d) is right view；
Fig. 3 is the left-handed nut schematic diagram of present clip；Wherein (a) is outside drawing；It (b) is left view；It (c) is vertical view
Figure；It (d) is right view；
Fig. 4 is right-handed nut's schematic diagram of present clip, wherein (a) is outside drawing；It (b) is left view；It (c) is vertical view
Figure；It (d) is right view；
Fig. 5 is the socket bar schematic diagram of present clip, wherein (a) outside drawing；(b) left view；(c) top view；(d) right
View；
Fig. 6 is the sleeve schematic diagram of present clip, wherein (a) outside drawing；(b) outside drawing；(c) left view；(d) it overlooks
Figure；
Fig. 7 is the connecting rod schematic diagram of present clip, wherein (a) outside drawing；(b) left view；(c) top view；(d) right view
Figure；
Fig. 8 is the wedge grip body schematic diagram of present clip, wherein (a) outside drawing；(b) left view；(c) top view；(d)
Right view；
Fig. 9 is the guide table schematic diagram of present clip, wherein (a) outside drawing；(b) front view；(c) top view；(d) right
View；
Figure 10 is the wedge-shaped fixture block schematic diagram of present clip, wherein (a) outside drawing；(b) left view；(c) top view；
(d) right view；
Figure 11 is the dormant bolt schematic diagram of present clip, wherein (a) outside drawing；(b) left view；(c) top view；
(d) right view；
Figure 12 is the baffle schematic diagram of present clip, wherein (a) outside drawing；(b) left view；(c) front view；(d) it bows
View；
Figure 13 is that fixture is assembled in the total figure tested on fatigue machine in the present invention；
Figure 14 is structure of the invention cross-sectional view；
Figure 15-21 is respectively to assemble upper and lower fixture procedure chart.
Specific embodiment
Present invention is generally directed to be suitable for the fatigue at high temperature fixture for carrying out tension test of flat test piece to be designed.
When actually testing, a whole set of fixture includes two present clips, is divided into upper fixture and lower fixture, the total figure completely installed is shown in figure
13。
Fixture includes with lower component：Central axis 1, left-handed nut 2, right-handed nut 3, socket bar 4, sleeve 5, connecting rod 6, wedge shape
Press from both sides body 7, guide table 8, wedge-shaped fixture block 9, dormant bolt 10, baffle 11.
Wherein, as represented in figures 1 through 14, the static position relationship between each building block is：Wedge grip body 7 and connecting rod 6 it
Between to be threadedly coupled, the following table face contact of the upper surface of 6 butt end of connecting rod and wedge grip body 7；The taper end of central axis 1 is from connecting rod 6
Butt end passes through the through-hole at 6 center of connecting rod, and 1 top of central axis is connect by screw thread with guide table 8；Sleeve 5 is from 1 optical wand end of central axis
It penetrates, the upper surface of 5 internal platform of sleeve and the following table face contact of 1 boss of central axis connect between sleeve 5 and connecting rod 6 for screw thread
It connects；Socket bar 4 is located at 5 two sides of sleeve, is threadedly coupled between sleeve 5；Right-handed nut 3 penetrates from 1 optical wand end of central axis, in
Mandrel 1 is threadedly coupled, 3 upper surface of right-handed nut and 5 following table face contact of sleeve；Left-handed nut 2 is penetrated from 1 optical wand end of central axis,
It is threadedly coupled with central axis 1,2 upper surface of left-handed nut and 3 following table face contact of right-handed nut；Two 9 lower half portion of wedge-shaped fixture block
It is fluted, it is connect between guide table 8 by groove, 8 upper surface of guide table is contacted with the upper surface of groove, 9 liang of wedge-shaped fixture block
Side is contacted with the cleat planes inside wedge grip body 7；Two baffles 11 pass through two dormant bolts 10 and 7 screw thread of wedge grip body
Connection, the rear surface of baffle are contacted with the front surface of two wedge-shaped fixture blocks 9.
Upper and lower fixture is assembled respectively, as shown in Figure 15-21, assembles upper fixture first.
1. the taper end of connecting rod 6 is tightened with the screw thread of wedge grip body 7 by screw thread and is connect, as shown in figure 15；
2. then 1 taper end of central axis to be passed through to the through-hole at 6 center of connecting rod, and guide table 8 is inserted in from 1 top of central axis,
It is tightened and is connect with central axis 1 by screw thread, as shown in figure 16；
3. the groove alignment guide platform 8 of two wedge-shaped fixture blocks 9 is put into, as shown in figure 17；
4. two baffles 11 are fixed on wedge grip body 7 by two dormant bolts 10, prevent wedge-shaped fixture block 9 from deviating from,
As shown in figure 18；
5. by sleeve 5 pass through central axis 1 optical wand end, contact the boss of central axis 1 with 5 inner platform of sleeve, sleeve 5 and
Connecting rod 6 is connected through a screw thread, at this time without tightening, as shown in figure 19；
It is connect 6. socket bar 4 is tightened by screw thread with sleeve 5, as shown in figure 20；
7. finally right-handed nut 3 and left-handed nut 2 are successively connect by screw thread with central axis 1, without tightening.It is at this time
The assembling of upper fixture is completed, as shown in figure 21.
The structure of lower fixture is identical as the structure of upper fixture, and assembling process is identical, and the taper end of connecting rod 6 passes through screw thread and wedge shape
The screw thread of folder body 7 tightens connection, then by 1 taper end of central axis across the through-hole at 6 center of connecting rod, and by guide table 8 from central axis 1
Top is inserted in, and is tightened and is connect with central axis 1 by screw thread, is then put into the groove alignment guide platform 8 of two wedge-shaped fixture blocks 9,
Two baffles 11 are fixed on wedge grip body 7 by two dormant bolts 10 again, prevent wedge-shaped fixture block 9 from deviating from.It then will set
Cylinder 5 passes through the optical wand end of central axis 1, contacts the boss of central axis 1 with 5 inner platform of sleeve, and sleeve 5 and connecting rod 6 pass through screw thread
Connection at this time without tightening, and socket bar 4 is tightened by screw thread with sleeve 5 and is connect.Finally, by right-handed nut 3 and left-handed spiral shell
Mother 2 is successively connect by screw thread with central axis 1, without tightening.The assembling of lower fixture is completed at this time.
After the assembling for completing upper and lower fixture, the connector in upper and lower fixture is put into fatigue machine hydraulic chuck fixture block respectively
In, then clamp fatigue machine fixture block.Complete the installation of fixture.
Flat test piece is respectively put between the wedge-shaped fixture block 9 in upper and lower fixture, then pulling socket bar 4 makes 5 band of sleeve
Dynamic connecting rod 6 and wedge grip body 7 decline, and reduce the distance between wedge-shaped fixture block 9, contact with flat test piece 12, pass through frictional force
Clamp flat test piece 12.It tightens right-handed nut 3 at this time to be allowed to hold out against sleeve 5, a left side is finally tightened in the downward displacement of limitation sleeve 5
Spin nut 2 withstands right-handed nut 3, and since two nut thread rotation directions are different, formation is self-locking, can prevent right-handed nut 3 from loosening.
The installation of test specimen is completed at this time.So far a whole set of fixture is installed.
Flat test piece is heated using induction coil, makes that section temperature is examined to be maintained at 800 DEG C, carries out the examination of high temperature alloy fatigue
It tests, frequency f=3Hz, stress ratio R=0.1, maximum pull load T=50kN, accumulation is carried out more than 107The fatigue examination of secondary circulation
It tests, fixture in order, illustrates that present clip can satisfy the repeated tension and compression test of flat test piece at high temperature.
From above-mentioned specific implementation process it can be found that present clip can carry out the stretching examination of flat test piece at high temperature
It tests.Of course, the tension test that present clip can be used under room temperature.
Above embodiments are provided just for the sake of the description purpose of the present invention, and are not intended to limit the scope of the invention.This
The range of invention is defined by the following claims.It does not depart from spirit and principles of the present invention and the various equivalent replacements made and repairs
Change, should all cover within the scope of the present invention.
Claims (2)
1. a kind of drawing by high temperature fatigue test clamper of flat test piece, it is characterised in that：Including central axis (1), left-handed nut
(2), right-handed nut (3), socket bar (4), sleeve (5), connecting rod (6), wedge grip body (7), guide table (8), wedge-shaped fixture block (9),
Dormant bolt (10), baffle (11) and flat test piece (12)；
One end of central axis (1), that is, optical wand end is connected with fatigue machine, and the other end is connect by screw thread with guide table (8)；Central axis
(1) it is inserted in sleeve (5), the upper surface of sleeve (5) internal platform and the following table face contact of central axis (1) boss；Sleeve (5) with
It is threaded connection between connecting rod (6)；Left-handed nut (2) is threadedly coupled by right-handed nut (3) with central axis (1), socket bar (4)
It is to be threadedly coupled between sleeve (5)；It is to be threadedly coupled between connecting rod (6) and wedge grip body (7)；Flat test piece (12) is by two
Wedge-shaped fixture block (9) in wedge grip body (7) clamps, and is connect between wedge-shaped fixture block (9) and guide table (8) by groove；Two
A baffle (11) is threadedly coupled by two dormant bolts (10) with wedge grip body (7)；
The left-handed nut (2) and right-handed nut's (3) thread rotary orientation are on the contrary, formation self-locking effect, the downward position of limitation sleeve (5)
It moves；
The clamping face of the wedge shape fixture block (9) is plane, contact surface and wedge grip body (7) inclination contact, limits wedge-shaped fixture block (9)
Upward displacement.
2. a kind of drawing by high temperature fatigue test clamper using flat test piece described in claim 1 carries out tensile fatigue test
Method, it is characterised in that steps are as follows：
Step 1：In tensile fatigue test, pulling force passes to central axis (1) by the collet of fatigue machine, and passes through central axis
(1) pulling force is transmitted to sleeve (5) by the boss on；
Step 2：Sleeve (5) is connected through a screw thread with connecting rod (6), so that pulling force has been passed to connecting rod (6)；
Step 3：Connecting rod (6), which is connected through a screw thread, passes to wedge grip body (7) for pulling force；
Step 4：Recess sidewall in wedge grip body (7) is contacted with wedge-shaped fixture block (9), so that wedge-shaped fixture block (9) keeps compression
State；
Step 5：Wedge-shaped fixture block (9) contacts with flat test piece (12), guarantees that flat test piece (12) do not skid by frictional force,
To realize the application of tensile load in tensile fatigue test.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710217684.4A CN106840867B (en) | 2017-04-05 | 2017-04-05 | A kind of the drawing by high temperature fatigue test clamper and method of flat test piece |
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| CN201710217684.4A CN106840867B (en) | 2017-04-05 | 2017-04-05 | A kind of the drawing by high temperature fatigue test clamper and method of flat test piece |
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| CN106840867B true CN106840867B (en) | 2018-11-23 |
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| CN108387457A (en) * | 2018-01-23 | 2018-08-10 | 安徽工业大学 | A kind of high/low temperature fatigue experimental device suitable for thin plate fatigue testing specimen |
| CN108760483A (en) * | 2018-08-23 | 2018-11-06 | 中国原子能科学研究院 | A kind of neutron small angle scattering high-temp in-situ Special fixture for tensile test |
| CN109632285B (en) * | 2019-02-25 | 2020-06-19 | 北京航空航天大学 | Turbine blade high temperature fatigue test anchor clamps |
| CN110987650A (en) * | 2019-12-30 | 2020-04-10 | 沈阳航空航天大学 | Voussoir compresses tightly formula low temperature fatigue anchor clamps |
| CN110987651A (en) * | 2019-12-30 | 2020-04-10 | 沈阳航空航天大学 | Nut pressing type low-temperature fatigue device |
| CN111256934A (en) * | 2020-03-31 | 2020-06-09 | 中国航发动力股份有限公司 | Turbine blade vibration test tool and turbine blade clamping method |
| CN113820215A (en) * | 2021-08-20 | 2021-12-21 | 北京工业大学 | Ultra-high temperature resistant fatigue test clamping device |
| CN114720291A (en) * | 2022-04-06 | 2022-07-08 | 成都先进金属材料产业技术研究院股份有限公司 | High-temperature fatigue test clamping structure for electro-hydraulic servo test machine |
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| KR950006418Y1 (en) * | 1991-12-30 | 1995-08-10 | 산업과학기술연구소 | Apparatus of tensile test |
| CN2667228Y (en) * | 2004-01-02 | 2004-12-29 | 王世清 | Self-locking screw |
| CN103954483A (en) * | 2014-03-18 | 2014-07-30 | 西安交通大学 | Superhigh-strength steel plate-shaped fatigue testing specimen, clamped position processing method and high-cycle fatigue testing method of superhigh-strength steel plate-shaped fatigue testing specimen |
| CN103969118A (en) * | 2014-05-16 | 2014-08-06 | 北京航空航天大学 | Novel composite material unnotched compression test fixture |
| CN204269471U (en) * | 2014-12-17 | 2015-04-15 | 吉林大学 | A kind of multi-functional uni-directional stretching test clamp |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR950006418Y1 (en) * | 1991-12-30 | 1995-08-10 | 산업과학기술연구소 | Apparatus of tensile test |
| CN2667228Y (en) * | 2004-01-02 | 2004-12-29 | 王世清 | Self-locking screw |
| CN103954483A (en) * | 2014-03-18 | 2014-07-30 | 西安交通大学 | Superhigh-strength steel plate-shaped fatigue testing specimen, clamped position processing method and high-cycle fatigue testing method of superhigh-strength steel plate-shaped fatigue testing specimen |
| CN103969118A (en) * | 2014-05-16 | 2014-08-06 | 北京航空航天大学 | Novel composite material unnotched compression test fixture |
| CN204269471U (en) * | 2014-12-17 | 2015-04-15 | 吉林大学 | A kind of multi-functional uni-directional stretching test clamp |
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| Publication number | Publication date |
|---|---|
| CN106840867A (en) | 2017-06-13 |
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