CN105651691B - A kind of T-shaped tear test mould and test method - Google Patents
A kind of T-shaped tear test mould and test method Download PDFInfo
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- CN105651691B CN105651691B CN201610116315.1A CN201610116315A CN105651691B CN 105651691 B CN105651691 B CN 105651691B CN 201610116315 A CN201610116315 A CN 201610116315A CN 105651691 B CN105651691 B CN 105651691B
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Abstract
The present invention relates to a kind of T-shaped tear test mould and test method, the mould to include：Fixed guide part, have and place the gap that tested T-shaped sample is not torn part, part is not torn for leading straight T-shaped sample；Elastic telescopic part, symmetrical two parts are arranged in the both sides of the fixed guide portion gap, and the both sides with the gap are connected respectively, and the symmetrical two parts can all make elastic telescopic deformation.Technical scheme passes through one end chuck the part connection tear cupping machine of elastic telescopic partial symmetry, the other end chuck of another part connection tear cupping machine, T-shaped sample is tested with the mobile drive of tensioning chuck to move to the direction of stretching, and keep being tested the centre position that T-shaped sample is also always positioned at the chuck of testing machine two in tear test process, prevent the non-tear portion of T-shaped tear test that warpage occurs, and be always maintained at vertical with the direction of tear stretching.It ensure that testing inspection result accurate stable.
Description
Technical field
The invention mainly relates to composite tear test, more particularly to a kind of T-shaped tear test mould of composite and
Test method.
Background technology
Composite is by coating and base material by certain cladding ratio, through certain combination process lamellar composite together.
Combination process be in order to adapt to the demand of different materials, make it is compound after material property it is more excellent, every layer of material is fully sent out
Its different performance is waved, thus composite has more better performances, and lower cost.
Layered metal composite material is due to excellent combination property, in generating, oil, chemical industry, automobile, building etc.
Field is widely applied.The bond quality at layered metal composite material interface can influence use and its life-span of product, because
This interface quality is to evaluate the good and bad leading indicator of layered metal composite material performance.
At present, the method for conventional quantitative detection interface bond strength there is drawing to cut, compression shear etc., qualitatively method has bending
Method.As when each layer thinner thickness of multi-layer metal composite material (＜ 0.5-1mm), interface is detected usually using the mode of tear
With reference to quality, typically using yi word pattern tear as the, Shang fonts such as Fig. 2 and T fonts of figure 1 it is as shown in Figure 3.
Tear 3 kinds of modes in, yi word pattern He Shang fonts tear be applied to layer of metal intensity it is relatively low, easily deform,
And another layer of metal strength is higher, difficult situation about deforming；The tear of T fonts is applied to that double layer of metal intensity is relatively low, Yi Fa
The metallic composite for the shape that changes.
When carrying out T font tear tests at present, the non-tear portion of composite is free end, and the part of tear is tried in tear
It is divided into before testing in the both ends of coaxial but opposite draw direction, and the part and non-tear portion are perpendicular.Tear test
When by separated both ends be clamped and fastened on tear cupping machine both ends chuck on, wherein one end chuck is fixed, the other end folder
Head loading stretching, until the part that the T-shaped composite of the experiment is not torn is all layered tear, the maximum, force measured is will
The tear edge of measurement.
But during actually tearing, warpage can occur for non-tear portion, and warpage degree constantly changes with tear process,
Testing result is extremely inaccurate.This is due to the difference that intensity between same metal be present so that tears process in T fonts
In, each layer flow of metal is inconsistent, this can be caused to be in the non-tear portion vertical with tear draw direction warpage occurs.
Due to the intensity and deformability of composite different metal is different, each layer metal tears when position put difference
(refer mainly to that the higher metal of intensity is in top or the relatively low metal of intensity is in top, because not torn in horizontal
Warpage can occur to the relatively low metal direction of intensity for part, as shown in Figure 4) etc. factor presence so that the condition tested every time
It is all different.And even if under same experimental condition, with the progress of tear, the warpage degree of non-tear portion is gradually increased, i.e., whole
For the warpage degree of non-tear portion all in time changing, these all will cause measurement result deviation to be present during individual tear, knot
Fruit is inaccurate, and experiment is difficult to be compared to each other every time.
It is therefore desirable to design a kind of T-shaped tear test mould and test method so that composite does T-shaped tear test
When so that T-shaped sample is in the centre position of tension test machine grip holder all the time, can prevent non-tear portion from warpage occurs, and
The state perpendicular with the direction of tear stretching is always maintained at during tear, to cause tear stretching uniform, to ensure
Testing inspection result accurate stable, experiment have strong comparativity.
The content of the invention
It is an object of the invention to provide a kind of T-shaped tear test mould and test method, make it that it is T-shaped that composite is done
During tear test so that T-shaped sample is in the centre position of tension test machine grip holder all the time, can prevent non-tear portion from occurring
Warpage, and the state perpendicular with the direction of tear stretching is always maintained at during tear.
To achieve these goals, the invention provides a kind of T-shaped tear test mould, the mould to include：
Fixed guide part, have and place the gap that tested T-shaped sample is not torn part, for leading straight T-shaped sample not
It is torn part；
Elastic telescopic part, symmetrical two parts are arranged in the both sides of the fixed guide portion gap, and respectively with institute
The both sides for stating gap are connected, and the symmetrical two parts can all make elastic telescopic deformation.
One end chuck of a portion connection tear cupping machine in tear, another part connection in tear are torn
Split the other end chuck of cupping machine.The elastic telescopic part is used to drive tested side of the T-shaped sample to stretching in tear
To movement, and keep being tested the centre position that T-shaped sample is also always positioned at the chuck of testing machine two in tear test process.
Further, fixed guide part includes described in above-mentioned mould：
Lead straight roll wheel assembly, including two rows be arranged symmetrically lead straight roller, the distance between the two rows roller rolling face limits
Described gap is gone out；
Fixed connecting plate, symmetrical two boards are respectively arranged the both sides that straight roller is led in two row；The two boards bottom
Portion is respectively provided with the ledge that two rows described in rotational support lead straight roller, and the bullet is connected respectively at the top of the two boards
Property telescopic section is symmetrically a part of.
Further, the two rows roller has often arranged three rollers, arranged for interval.
Above-mentioned mould, the fixed guide part also include connecting bolt group, connected for adjustable spacing described solid
Determine the symmetrical two boards of connecting plate.
Above-mentioned mould, it is described to lead straight roll wheel assembly and also include bearing, rotate be fixed on it is prominent on the fixed connecting plate
Go out part；The roller axle journal is through the bearing and can be rotated with the bearing.
Above-mentioned mould, through hole is provided with the fixed connecting plate, for two parts through tested T-shaped sample tear.
Above-mentioned mould, the elastic telescopic part include：
Spring and top plate, wherein one end of the spring is fixedly connected with the top plate, the other end is fixedly connected with described
Plate is fixedly connected.
Two parts of the roof symmetric when tearing tension test and cupping machine each chuck connect.
Further, the spring is hydraulic spring grease cup or common spring.
Above-mentioned mould, number of springs of the two-part elastic telescopic part per part are 2, are arranged at intervals.
The method tested according to above-mentioned mould that technical scheme provides, comprises the following steps：
S1：Prepare to be tested T-shaped sample, and be layered out in one end of the sample perpendicular to non-tear portion positioned at same flat
The two parts in face；
S2：The T-shaped non-tear portion adjustment of sample is positioned in the gap of fixed guide part of the mould；
S3：Kong Bingyu tension tests two parts that the T-shaped sample separates being each passed through on the fixed connecting plate
The two tensioning chucks connection of machine；
S4：Two parts of the elastic telescopic partial symmetry are connected with two chucks of cupping machine respectively；
S5：Tear tension test is carried out using cupping machine.
T-shaped tear test mould provided by the invention and test method, during make it that composite does T-shaped tear test,
With the progress of tear test tested T-shaped sample can be made to be in the centre position of tension test machine grip holder all the time, can prevented not
Warpage occurs for tear portion, and the state perpendicular with the direction of tear stretching is always maintained at during tear.This kind is tested
Mould and test method ensure that the stabilization of experiment with it is accurate so that result of the test is reliable, and the comparativity tested for each time is strong.
Brief description of the drawings
Fig. 1 is the yi word pattern tear schematic diagram of conventional tear test；
Fig. 2 is conventional tear test Shang fonts tear schematic diagram；
Fig. 3 is the T fonts tear schematic diagram of conventional tear test；
Fig. 4 T-shaped sample non-tear portion generation buckling deformation schematic diagrames when being conventional T-shaped tear test；
Fig. 5 is the structural representation for utilizing the T-shaped tear test die test in technical solution of the present invention embodiment；And
Fig. 6 is the fixed guide part side view structure of the T-shaped tear test mould in technical solution of the present invention example
Schematic diagram.
Embodiment
Below in conjunction with drawings and examples, the embodiment of the present invention is described in more details, so as to energy
The advantages of enough more fully understanding the solution of the present invention and its various aspects.However, specific embodiments described below and reality
Example is applied to be for illustrative purposes only, rather than limitation of the present invention.
The invention provides a kind of T-shaped tear test mould, as shown in figure 5, the mould includes the He of fixed guide part 1
Elastic telescopic part 2.
Fixed guide part 1, have and place the gap 10 that tested T-shaped sample is not torn part, for leading straight T-shaped sample
3 are not torn part 31, and keep the gap 10 to immobilize at the trial.Gap length in the part regards tested sample
Depending on thickness, it can be adjusted when clamping is tested T-shaped sample.
Wherein limiting for gap 10 can be limited by the opposite face between two pieces of flat boards of one group of parallel interval setting, also may be used
Limited by the rolling face of two row's rollers of parallel interval setting.Certainly also can be by realizing otherwise.
In order to limit the buckling deformation of the tested non-tear portion of T-shaped sample, the gap of tested T-shaped sample is limited as far as possible
It is small so that the top and bottom of thickness direction of the qualified surface in gap with being tested T-shaped sample can be just bonded.
But T samples non-tear portion when stretching is mobile in gap to produce frictional force with the qualified surface in gap in order to avoid tearing,
The measurement result of final tear stretching is influenceed, the setting in gap, which should try one's best, does not extrude tested T-shaped sample, even and if in order that obtaining has
Frictional force generation is also small as much as possible, preferably limits tested T-shaped examination using the rolling face of two row's rollers of parallel interval setting
The gap of sample.
Elastic telescopic part 2, it is made up of symmetrical two parts, the two parts are arranged in the fixed guide portion gap
10 both sides, and the both sides with the gap 10 are connected respectively.A portion connection in tear tears the one of cupping machine
Hold chuck, the other end chuck of another part connection tear cupping machine in tear.
Elastic telescopic part 2, which is used to drive in tear, is tested direction movement of the T-shaped sample to stretching, and keeps tested T
Type sample is also always positioned at the centre position of the chuck of testing machine two in tear test process.This is because in cupping machine one end
Tensioning chuck is motionless, when the tear of the tensioning chuck movement of the other end stretches, should make the non-tear portion of T-shaped sample towards draw direction
Mobile distance is the half of stretching-machine tensioning chuck displacement, just can guarantee that tested T-shaped sample in tear test process
The centre position of the chuck of testing machine two is always positioned at, and non-tear portion is vertical with tear portion holding.This can be interpreted
It is as follows：
When T-shaped sample tear portion is torn out distance a, tear portion by separated two parts respectively extend a grow, i.e., with not
General extension 2a distance on the vertical draw direction of tear portion, because one end chuck of testing machine is secured, experiment
This end movement 2a of machine tensioning chuck length.
And the part that T-shaped sample is not torn is connected with the tensioning chuck of cupping machine, this is caused not to be torn portion
Divide the length for moving a, then the fixed chuck of the part and cupping machine and tensioning chuck should be distinguished elastic connection, and
The flexible member on both sides is answered identical so that the elongation strain of two parts flexible member is identical.The flexible member of i.e. T-shaped sample connection
In the stretching direction with tensioning chuck general extension 2a distances, symmetry equivalent both sides flexible member respectively extends a distance, in bullet
Property element center section a tested T-shaped sample just only distance for mobile a length naturally.So ensure that tested T-shaped sample is being torn
The centre position that experiment process is also always positioned at the chuck of testing machine two is split, and non-tear portion is vertical with tear portion holding.Cause
And mobile this part for being tested the T-shaped non-tear portion of sample is designed as elastic telescopic part.
Further, fixed guide part includes described in above-mentioned mould：
Lead straight roll wheel assembly 11, including two rows be arranged symmetrically lead straight roller 111, the distance between the two rows roller rolling face
Define described gap 10；
Fixed connecting plate 12, including symmetrical two boards, the two boards are respectively arranged leads straight roll wheel assembly 11 in described
Both sides, the two boards bottom 121 are respectively provided with the ledge 1211 that two rows described in rotational support symmetrically lead straight roller,
As shown in Figure 6.It is symmetrically a part of that the two boards top 122 connects the elastic telescopic part 2 respectively.
Further, the two rows roller has often arranged three rollers 1111, arranged for interval.But the data are not required
, it can arbitrarily set the number of roller.
Above-mentioned mould, the fixed guide part 1 also include connecting bolt group, connected for adjustable spacing described solid
Determine 12 symmetrical two boards of connecting plate.The bolt group is not shown in figure.
Above-mentioned mould, described to lead straight roll wheel assembly 11 and also include bearing, bearing, which rotates, is fixed on the fixed connecting plate
At ledge 1211 on 12, the axle journal of roller 1111 is through the bearing and can be rotated with the bearing.Bearing is being schemed
In be also not shown.
Above-mentioned mould, can be if length of the fixed connecting plate 12 at T-shaped this end of sample tear portion is longer
Each opened hole on its upper and lower plates, for two parts through tested T-shaped sample tear.
Above-mentioned mould, the elastic telescopic part 2 are symmetrical two parts, every partly to include：
Spring 21 and top plate 22, wherein one end 211 of the spring 21 is fixedly connected with the top plate 22, the other end 212
It is fixedly connected with the fixed connecting plate 12.The symmetrical top plate 22 when tearing tension test and cupping machine it is each
Chuck connects.
Further, the spring 21 is hydraulic spring grease cup or common spring.Certainly this is more common spring, the kind of spring
Class is extremely more, and other types of springs, such as disc spring group etc. can be selected according to actual conditions.
Above-mentioned mould, number of springs of the symmetrical two-part elastic telescopic part 2 per part is 2, is spaced cloth
It is placed in the side of the top plate 22.What the setting of certain quantity nor is it necessary that.In order that T-shaped sample must be torn during stretching not
Can be steady when being moved in the whole length of tear portion towards draw direction, it can be arranged at intervals along T-shaped specimen length direction identical
Spring.When the number of springs of every partial elastic telescopic section 2 is more than 1, it should ensure that fixed connecting plate connects with the partial spring
The flush with portions connect, in case the T-shaped non-tear portion of sample moves not in the whole length of draw direction during tear stretching
Balance.
The T-shaped tear test mould that present invention described above provides, during make it that composite does T-shaped tear test,
It can prevent non-tear portion from warpage occurs, and the shape perpendicular with the direction of tear stretching is always maintained at during tear
State, and it is in the centre position of tension test machine grip holder as the progress of tear test can make to be tested T-shaped sample all the time.
The method tested according to above-mentioned mould that technical scheme provides, comprises the following steps：
S1：Prepare to be tested T-shaped sample, and be layered out in one end of the sample perpendicular to non-tear portion positioned at same flat
The two parts in face；
S2：The T-shaped non-tear portion adjustment of sample is positioned in the gap of fixed guide part of the mould；
S3：Kong Bingyu tension tests two parts that the T-shaped sample separates being each passed through on the fixed connecting plate
The two tensioning chucks connection of machine；
S4：Two parts of the elastic telescopic partial symmetry are connected with two chucks of cupping machine respectively；
S5：Tear tension test is carried out using cupping machine.
Tear tension test specifically is carried out, is explained as follows referring to the drawings 5, Fig. 6.
Tested metallic composite selects 0.8mm aluminium laminations and 0.8mm stainless steel composite materials, specimen width 10mm, length
Spend 200mm.
After tested composite is ready to, sample is processed into T font samples.Composite sample one end is layered as
Two parts, in the two parts are generally aligned in the same plane and, the i.e. on-test time-division vertical with the i.e. non-tear portion 31 of non-layered portion
The tear portion of layer and the T-shaped shape of non-tear portion.
The T-shaped non-tear portion 31 of sample is deformed during to prevent tear test, and the non-tear portion 31 of T-shaped sample is loaded above-mentioned mould
In the gap 10 of the fixed guide part 1 of tool, and adjust gap 10 and be sized such that the roller 1111 of fixed guide part 1 is not right
Tested T-shaped sample 3 produces extruding.
The T-shaped tear test of composite is carried out using cupping machine.The both ends chuck of cupping machine respectively with
The both ends connection that ready tested T-shaped sample 3 is layered, and allow the both ends of layering to be each passed through the fixed connecting plate of above-mentioned mould
Through hole on 12.
Meanwhile be connected two parts of the elastic telescopic partial symmetry with two chucks of cupping machine respectively, i.e.,
Symmetrical two pieces top 22 respectively connect cupping machine fix chucks with stretching chuck, the connection can by rope band,
The simple tools such as chain with experiment machine grip holders bundle top 22 or have contact with and are connected, and also can specially make connection fixture and be connected
Connect.But in order that the T-shaped non-tear portion 31 of sample is steady along moving for draw direction when must tear stretching, non-tear portion is whole
Balance is kept in length, tie point is located at when being preferably connected the middle part of top plate.
Cupping machine wherein one end chuck is fixed, the loading stretching of other end chuck.
Tear in drawing process, the T-shaped non-tear portion of sample is gradually removed in above-mentioned mould with the progress of tear stretching
Fixed guide part gap, while mobile, the roller of gap both sides up and down can be with the movement of T-shaped sample and thereon
Caused friction and rotates, but because the force of rolling friction is minimum, can be ignored for measuring tear edge.
T-shaped tear test mould drives T-shaped sample to be moved with the movement of tensioning chuck and towards draw direction, wherein, Gu
Determine the overall shift invariant in the stretching direction with non-tear portion 31 of targeting part 1, and 2 symmetrical two parts of elastic telescopic part
Non- tear portion 31 is respectively further from the stretching direction to move.Meanwhile in the both ends of T-shaped sample tear portion, wherein one end because
Fixed and motionless with fixed chuck, the other end moves with tensioning chuck towards draw direction.
At the end of final tear stretching, whole T-shaped sample is torn is not torn part 31 for two parts, i.e., T-shaped sample
Also be all torn out, and now the non-tear portion of T-shaped sample all out of tear test mould fixed guide part 1 gap
10, T-shaped sample has had disengaged from T-shaped tear mould.
The average tension of Tensile Test Tensile chuck will be torn, subtract the elastic deformation force in elastic telescopic part, be
The tear edge measured.Wherein elastic deformation force can obtain according to the elastic displacement measured and the Rigidity Calculation of itself, i.e. F=A*S,
Wherein F is elastic deformation force, and A is spring rate, and S is elastic displacement.
The T-shaped tear test mould and test method of the embodiment of the present invention, to cause composite to do T-shaped tear test
When, with the progress of tear test tested T-shaped sample can be made to be in the centre position of tension test machine grip holder all the time, can prevented
Warpage occurs for non-tear portion, and the state perpendicular with the direction of tear stretching is always maintained at during tear, this kind examination
Test mould and test method ensure that the stabilization of experiment with it is accurate so that result of the test is reliable, and the comparativity tested for each time is strong.
Finally it should be noted that：Obviously, above-described embodiment is only intended to clearly illustrate example of the present invention, and simultaneously
The non-restriction to embodiment.For those of ordinary skill in the field, can also do on the basis of the above description
Go out other various forms of changes or variation.There is no necessity and possibility to exhaust all the enbodiments.And thus drawn
Among the obvious changes or variations that Shen goes out is still in protection scope of the present invention.
Claims (10)
1. a kind of T-shaped tear test mould, it is characterised in that the mould includes
Fixed guide part, have and place the gap that tested T-shaped sample is not torn part, do not torn for leading straight T-shaped sample
Split part；
Elastic telescopic part, symmetrical two parts are arranged in the both sides of the fixed guide portion gap, and respectively with it is described between
The both sides of gap are connected, and the symmetrical two parts can all make elastic telescopic deformation.
2. mould according to claim 1, it is characterised in that the fixed guide part includes
Lead straight roll wheel assembly, including two rows be arranged symmetrically lead straight roller, the distance between the two rows roller rolling face defines
Described gap；
Fixed connecting plate, symmetrical two boards are respectively arranged in the both sides for leading straight roller；The two boards bottom is set respectively
There is the ledge for leading straight roller described in rotational support, the elastic telescopic part pair is connected respectively at the top of the two boards
A part for title.
3. mould according to claim 2, it is characterised in that the two rows roller has often arranged three rollers, is spaced cloth
Put.
4. mould according to claim 2, it is characterised in that the fixed guide part also includes connecting bolt group, uses
The symmetrical two boards of the fixed connecting plate are connected in adjustable spacing.
5. mould according to claim 2, it is characterised in that it is described to lead straight roll wheel assembly and also include bearing, rotate and fix
Ledge on the fixed connecting plate；The roller axle journal is through the bearing and can be rotated with the bearing.
6. mould according to claim 2, it is characterised in that through hole is provided with the fixed connecting plate, for through quilt
Survey two parts of T-shaped sample tear.
7. mould according to claim 2, it is characterised in that the elastic telescopic part includes
Spring and top plate, wherein one end of the spring is fixedly connected with the top plate, the other end is consolidated with the fixed connecting plate
Fixed connection.
8. mould according to claim 7, it is characterised in that the spring is hydraulic spring grease cup or common spring.
9. mould according to claim 7, it is characterised in that number of springs of the elastic telescopic part per part is 2
It is individual, it is arranged at intervals.
10. according to the method for the die test described in any one of claim 2 to 9, it is characterised in that methods described includes following
Step：
S1：Prepare to be tested T-shaped sample, and be layered out in one end of the sample being generally aligned in the same plane perpendicular to non-tear portion
Two parts；
S2：The T-shaped non-tear portion adjustment of sample is positioned in the gap of fixed guide part of the mould；
S3：Two drawings of Kong Bingyu cupping machines two parts that the T-shaped sample separates being each passed through on fixed connecting plate
Stretch chuck connection；
S4：Two parts of the elastic telescopic partial symmetry are connected with two chucks of cupping machine respectively；
S5：Tear tension test is carried out using cupping machine.
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| CN109406317B (en) * | 2017-08-16 | 2024-04-12 | 中国石油化工股份有限公司 | Device and method for testing longitudinal tearing strength of film |
| CN108152129B (en) * | 2017-11-20 | 2020-05-05 | 河南工业大学 | Thin-wall flexible material layered tearing test device and test method thereof |
| CN108827667B (en) * | 2018-07-20 | 2024-04-23 | 常州市新创智能科技有限公司 | Curved surface type fatigue spline detection device |
| CN110406676A (en) * | 2019-07-22 | 2019-11-05 | 航宇救生装备有限公司 | A kind of protective device for preventing air-dropped material from damaging |
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| CN204027984U (en) * | 2014-05-13 | 2014-12-17 | 北京海纳川汽车底盘系统有限公司 | A kind of tack-weld peel test device |
| CN204359584U (en) * | 2015-02-06 | 2015-05-27 | 山东安能输送带橡胶有限公司 | Semi-automatic fabric core conveyor belt stripping glue machine |
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