CN206573411U - Single fiber interface shear strength test device - Google Patents
Single fiber interface shear strength test device Download PDFInfo
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- CN206573411U CN206573411U CN201720173353.0U CN201720173353U CN206573411U CN 206573411 U CN206573411 U CN 206573411U CN 201720173353 U CN201720173353 U CN 201720173353U CN 206573411 U CN206573411 U CN 206573411U
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Abstract
The utility model discloses a kind of single fiber interface shear strength test device, including filament stretch instrument, clamp tool, dynamic fixture, single fiber pull-out servicing unit；Single fiber pull-out servicing unit includes mounting assembly, auxiliary clamp, display and flexible regulatory component；Mounting assembly is made up of sliding support, hold-down support and base-plate；Display is set on auxiliary clamp；One flexible regulatory component is respectively set in the both sides of auxiliary clamp, two flexible regulatory components are symmetrical into minute surface relative to auxiliary clamp；Each flexible regulatory component is made up of the telescopic end being arranged in order, fixing end sleeve pipe and the round end containing scale, round end of the local sleeve in fixing end sleeve pipe is connected with fixed end cap pipe screw thread, and telescopic end of the local sleeve in fixing end sleeve pipe is fixedly linked with round end；Telescopic end is connected with auxiliary clamp.
Description
Technical field
The utility model is related to a kind of single fiber interface shear strength test device.
Background technology
Composite is compared with traditional metal materials, the features such as with high specific strength, corrosion-resistant high ratio modulus, endurance,
It is widely used in the higher industry of Aero-Space, ship, traffic, medical equivalent-load Capability Requirement.And composite be by matrix,
The phase composition of reinforcing material two, can produce interface between phase and phase, and reinforcing material and matrix are combined into an entirety by interface, effectively
Ground transmits stress, and extraneous load is born jointly, therefore, and studying composite material interface performance and it is characterized exactly has
Significance.
At present, between test fiber and the matrix of main flow the method for interface performance have single fiber pull-out, critical fibre length method,
Micro- unsticking method etc..The sample of wherein micro- de- glutinous method experiment makes relatively simple, but testing equipment is with high costs and is not easy to operation.
And single fiber resin pulling out method has test method simplicity, observes convenient, equipment making low cost and other advantages, this method is by list
In root fiber one end embedment resin matrix, single fiber composite is formed after being stripped taking-up after resin solidification, is existed by testing machine
Fiber upper end applies along fiber axial force to be departed from single fiber from resin matrix, records the maximum produced in withdrawal process
Load is so as to obtain interface shear strength, coefficient of friction etc..
SFPOT systems used in current single fiber pull-out method include auto-loading system, extensometer, miniature calculating
Machine, microscopic observation system；More difficult in sample preparation, fiber upper end clamping, lower end contact pressure resin simultaneously stretches into certain depth, treats solid
Tested after change, automatic uniform speed loading in upper end rises, and draws load-displacement curve.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of single fiber interface shear strength test device, using this
Test device can solve to exist in the prior art sample and make in difficult, operating process the test failure caused by clamp precision is improper
The problems such as, shear strength produced when fiber is extracted with resin can be conveniently tested using the test device, i.e. test
Single fiber and resin boundary surface shear strength, can effectively reduce experiment dispersion.
In order to solve the above-mentioned technical problem, the utility model provides a kind of single fiber interface shear strength test device, bag
Include filament stretch instrument, clamp tool, dynamic fixture, in addition to single fiber pull-out servicing unit；
The single fiber pull-out servicing unit includes mounting assembly, auxiliary clamp, display and flexible regulatory component；
The mounting assembly is made up of sliding support, hold-down support and base-plate；Set respectively at the two ends of base-plate
Sliding support and hold-down support are put, the sliding support is slided with base-plate to be connected, hold-down support and base-plate stationary phase
Even；
Display is set on auxiliary clamp；
One flexible regulatory component is respectively set in the both sides of auxiliary clamp, two flexible regulatory components are relative to auxiliary clamp
It is symmetrical into minute surface；
Each flexible regulatory component is made up of the telescopic end being arranged in order, fixing end sleeve pipe and the round end containing scale,
Round end of the local sleeve in fixing end sleeve pipe is connected with fixed end cap pipe screw thread, local sleeve stretching in fixing end sleeve pipe
Contracting end is fixedly linked with round end；Telescopic end is connected with auxiliary clamp；
Fixing end sleeve pipe in one flexible regulatory component is fixedly linked with sliding support, in another flexible regulatory component
Fixing end sleeve pipe be fixedly linked with hold-down support.
It is used as the improvement of single fiber interface shear strength test device of the present utility model：
The auxiliary clamp is constituted by two into the symmetrical up big and down small chamfer of minute surface is trapezoidal, and two chamfers are trapezoidal
Hypotenuse cooperatively form the clamp port of auxiliary clamp.
It is used as the further improvement of single fiber interface shear strength test device of the present utility model：
Display is microscopy device.
It is used as the further improvement of single fiber interface shear strength test device of the present utility model：
The inwall of fixing end sleeve pipe is provided with internal thread, and the outer wall of round end is outer provided with what is matched with the internal thread
Screw thread；By internal thread and externally threaded cooperation, round end realizes that screw thread is connected with fixing end sleeve pipe.
It is used as the further improvement of single fiber interface shear strength test device of the present utility model：
The precision of round end high scale is 0.001mm.
It is used as the further improvement of single fiber interface shear strength test device of the present utility model：
Auxiliary clamp is the auxiliary clamp that metal is made；
The clamp port of auxiliary clamp sets chamfering, so as to avoid the metal edge cut-out of monfil clamped mouth when introducing
Or surface abrasion produces test error；
Auxiliary clamp ensures precision, and dimensional tolerance is within 0.01mm.
The utility model further simultaneously discloses the single fiber interface shear strength method of testing carried out using said apparatus, successively
Follow the steps below：
1) sample, is made：
In the lower end fixing resin of monfil, the length that monfil is embedded in resin is L；
That is, prepared by sample makes with reference to micro- de- glutinous experiment, is specially：First monfil is pasted onto on mould, wiping die
Tool and monfil surface, are dropped on the monfil in mould with resin, and control resin impregnates the length of monfil, waits
Solidification；The length that monfil is embedded in resin is L；
2), by mobile sliding support, the clamp port of auxiliary clamp is in clamped condition, write down initial on round end
Scale I；
By rotating round end, the clamp port of auxiliary clamp is in releasing orientation, the upper end of monfil is fixed on
On the dynamic fixture of filament stretch instrument, the lower end of monfil is set to naturally droop clamp port through auxiliary clamp, resin is located at auxiliary
Help the lower section of fixture；The position of monfil is observed and adjusted by display, monfil is located at the interposition of clamp port
Place is put, and does not come in contact and (that is, is not attached mutually with auxiliary clamp) with auxiliary clamp；
Again by rotating round end, monfil is set just to pass through in test from clamp port (i.e. fixture gap), then
Write down the test scale II on round end, initial scale I and the diameter D that the difference for testing scale II is monfil；
Explanation：Monfil is set just to pass through in test from clamp port (i.e. fixture gap), i.e. auxiliary under this state
Help fixture to be just in contact with monfil, but the power perpendicular to monfil is not produced to monfil；
3), start filament stretch instrument, pass through maximum tension load F and power-displacement in tensilometer test record withdrawal process
Curve；
The maximum tension load F is load of the resin with monfil when de- glutinous in monfil withdrawal process；
4) the interface shear strength τ of composite, is calculated according to formula：
τ=F/ π DL；
Wherein τ is composite material interface shear strength, and unit is MPa；F is resin and fiber in monfil withdrawal process
Peak load (data can be directly obtained from filament stretch instrument) when de- glutinous, unit is mN；π is pi；D is tested
Monfil diameter, unit for μm；L be composite in monfil embedment resin in length, unit for μm.
When monfil is carbon fiber, buried depth is 100 ± 10 μm.
In the utility model, auxiliary clamp is made of metal, so as to meet high-precision demand.Auxiliary clamp needs
Control clamp port precision, including clamp port is linear and chamfering precision, accuracy guarantee is within 0.01mm.
In the utility model, carbon fiber diameter is relatively low, about 7 μm, more than about 40 μm of resin bulb diameter.
The core component for the tester that the utility model is used is single fiber pull-out servicing unit.Flexible regulatory component
Similar to micrometer, the round end of right-hand member is carved with scale, by rotating controllable telescopic end, so as to accurately adjust fixture horizontal position
Put, precision reaches 0.001mm.
In the utility model, if eliminating single fiber pull-out servicing unit, it is strong that original device can only test fiber stretching
The index such as degree and modulus, it is impossible to test single fiber interface shear strength.
Single fiber resin boundary surface testing device for shear strength of the present utility model and method have following technical advantage：
1st, with precision is high, easy to operate, easy-to-dismount feature, it is easy to make with reference to micro- de- glutinous test sample, i.e. sample
It is simple for production.
2nd, using device of the present utility model, the fiber of more than 5 μm of diameter can be measured, it is adaptable to the fiber of different-diameter
Shear strength is tested, while fibre diameter and resin matrix diameter can be measured during test.
It is specific as follows：The clamp port of auxiliary clamp is in clamped condition, write down left rotation and right rotation end under this state corresponding
Scale I, by rotating round end, makes monfil just pass through in test from clamp port (i.e. fixture gap), then write down
The difference of the corresponding scale II in left rotation and right rotation end under this state, scale I and scale II is the diameter D of single fiber；Resin matrix
Diameter is tested similarly.
3rd, servicing unit measuring accuracy of the present utility model reaches 0.001mm, left rotation and right rotation end can be rotated simultaneously and adjusted
Fixture, is easy to the fiber of different-diameter to test.
4th, servicing unit of the present utility model can adjust chucking position to ensure loading direction and fiber axis before testing
To consistent.That is, adjusting apparatus position and chucking position before testing, make monfil freely sagging just through fixture without pasting
Attached fixture, can so make it that fixture only applies the shearing force along machine direction to monfil in drawing process.
5th, using the test device of the present utility model containing servicing unit, the shearing that can accurately measure composite is strong
Degree.
Brief description of the drawings
Embodiment of the present utility model is described in further detail below in conjunction with the accompanying drawings.
Fig. 1 be test device of the present utility model in single fiber pull-out servicing unit dimensional structure diagram；
Fig. 2 be Fig. 1 in 5 real use state of auxiliary clamp when structural representation；
Fig. 3 is test device real use state schematic diagram of the present utility model.
In figure：1-- monfil (resinous), 2-- displays, 3-- telescopic ends, 4-- round ends, 5-- auxiliary clamps,
6-- fixing end sleeve pipes, 7-- base-plates, 8-- sliding supports, 9-- hold-down supports, 10-- filament stretch instrument, 11-- clamps tool,
12-- moves fixture.
Embodiment
The utility model is described further with reference to specific embodiment, but protection domain of the present utility model is simultaneously
It is not limited only to this.
Embodiment 1, a kind of single fiber interface shear strength test device, including the list with clamp tool 11 and dynamic fixture 12
Silk tensilometer 10, in addition to single fiber pull-out servicing unit.
Single fiber pull-out servicing unit includes mounting assembly, auxiliary clamp 5, display 2 and flexible regulatory component.Bearing group
Part is made up of sliding support 8, hold-down support 9, base-plate 7；Sliding support 8 is set respectively at the two ends of base-plate 7 and solid
Determine bearing 9, the sliding support 8 is slided with base-plate 7 to be connected, and hold-down support 9 is fixedly linked with base-plate 7.
One flexible regulatory component is respectively set in the both sides of auxiliary clamp 5, two flexible regulatory components are relative to additional lock
Tool 5 is symmetrical into minute surface.Each flexible regulatory component is by the telescopic end 3 being arranged in order, fixing end sleeve pipe 6, the round end 4 containing scale
Composition, round end 4 of the local sleeve in fixing end sleeve pipe 6 is connected with the screw thread of fixing end sleeve pipe 6, is specially：Fixing end sleeve pipe 6
Inwall be provided with internal thread, the outer wall of round end 4 is provided with the external screw thread matched with the internal thread；By internal thread and
It is externally threaded to coordinate, so as to realize that round end 4 realizes that screw thread is connected with fixing end sleeve pipe 6.Local sleeve is in fixing end sleeve pipe 6
Telescopic end 3 be fixedly linked with round end 4；Telescopic end 3 is fixedly linked with auxiliary clamp 5.Consolidating in one flexible regulatory component
Fixed end sleeve pipe 6 is fixedly linked with sliding support 8, and the fixing end sleeve pipe 6 in another flexible regulatory component is fixed with hold-down support 9
It is connected.
The auxiliary clamp 5 is constituted by two into the symmetrical up big and down small chamfer of minute surface is trapezoidal, two chamfer ladders
The hypotenuse of shape cooperatively forms the clamp port of auxiliary clamp 5.Display 2 is set on auxiliary clamp 5, and display 2 is aobvious for microscope
Show device.Display 2 is just to clamp port, consequently facilitating the situation in observation clamp port.
Auxiliary clamp 5 is the auxiliary clamp that metal is made；The clamp port of auxiliary clamp 5 sets chamfering, so as to avoid monofilament
The metal edge cut-out of clamped mouth or surface abrasion produce test error when fiber 1 is introduced.Auxiliary clamp 5 should ensure that essence
Degree, dimensional tolerance is within 0.01mm.The precision of the high scale of round end 4 is 0.001mm.
The support 101 of filament stretch instrument 10 is fixedly linked with base 102, and being provided with support 101 can be relative to support 101
The dynamic fixture 12 moved up and down, is additionally provided with the clamp tool 11 being fixedly linked with support 101 on support 101, and dynamic fixture 12 is located at
The top of clamp tool 11.
Single fiber pull-out servicing unit is placed on base 102, and positioned at the lower section of clamp tool 11.The dynamic fixture 12 of adjustment
Put, the upper end of monfil 1 can be clamped, monfil 1 is fixed on dynamic fixture 12 so as to realize, fixture 12 is moved during test
Real-time testing tensile force simultaneously will be pulled up.Clamp tool 11 is used to fix monfil 1, carries out Fiber Tensile Test.
The single fiber interface shear strength method of testing carried out using said apparatus, is followed the steps below successively：
1) sample, is made：
Prepared by sample makes with reference to micro- de- glutinous experiment, is specially：First monfil 1 is pasted onto on mould, mould is wiped
And the surface of monfil 1, dropped to resin on the monfil 1 in mould, control resin impregnates the length of monfil 1, etc.
It is to be solidified；The length that monfil 1 is embedded in resin is L；That is, the lower end of monfil 1 is fixed with resin；
For the less carbon mono-filaments of diameter, buried depth is normally controlled in 100 μm or so；
For larger-diameter glass fibre and aramid fiber monofilament, buried depth can be 0.3~1mm or so；
2), by mobile sliding support 8, the clamp port of auxiliary clamp 5 is in clamped condition, write down on round end 4
Initial scale I；
By rotating round end 4, the clamp port of auxiliary clamp 5 is in releasing orientation, the upper end of monfil 1 is fixed
On the dynamic fixture 12 of filament stretch instrument 10, the lower end of monfil 1 is naturally drooped clamp port through auxiliary clamp 5, make
Clamping fixture 5 only applies the shearing force along machine direction when obtaining the stretching of fiber upper end, and resin is located at the lower section of auxiliary clamp 5；It is logical
Cross the position that display 2 is observed and adjusts monfil 1, make monfil 1 be located at clamp port middle position, and not with it is auxiliary
Fixture 5 is helped to come in contact and (that is, do not attached mutually with auxiliary clamp 5)；
Again by rotating round end 4, monfil 1 is set just to pass through in test from clamp port (i.e. fixture gap),
The test scale II on round end 4, initial scale I and the diameter D that the difference for testing scale II is monfil are write down again；
Explanation：Monfil 1 is set just to pass through in test from clamp port (i.e. fixture gap), i.e. auxiliary under this state
Help fixture 5 to be just in contact with monfil 1, but the power perpendicular to monfil is not produced to monfil 1；
3) monfil 1 after solidification is clamped on fixture 12 when, testing, through the center of fixture 5, record
Length L in silk fiber embedment resin, operation filament stretch instrument 10, while recording apparatus is shown in the withdrawal process of monfil 1
Maximum tension load F and force-displacement curve；
The maximum tension load F is load of the resin with monfil 1 when de- glutinous in the withdrawal process of monfil 1；
4) the interface shear strength τ of composite, is calculated according to formula：
τ=F/ π DL；
Wherein τ is composite material interface shear strength, and unit is MPa；F is resin and fibre in the withdrawal process of monfil 1
Peak load when dimension is de- glutinous, unit is mN；π is pi；D is the diameter for the monfil 1 tested, unit for μm；L is multiple
In condensation material monfil 1 embedment resin in length, unit for μm.
Experiment one, the material of 1# monfil are T700 carbon fibers, and D is 7 μm, and resin is epoxy resin；L is 45 μm of (trees
Fat is attached on a diameter of 45 μm of the diameter after monfil 1, i.e. resin matrix), F is 60.335mN.
According to τ=F/ π DL, therefore the composite material interface shear strength τ of final gained is 61Mpa.
Experiment two, the material of 2# monfil are T800 carbon fibers, and D is 5 μm, and resin is epoxy resin；L is 40 μm of (trees
Fat is attached on a diameter of 40 μm of the diameter after monfil 1, i.e. resin matrix), F is 44.588mN.
According to τ=F/ π DL, therefore the composite material interface shear strength τ of final gained is 71Mpa.
Experiment three, the material of 3# monfil are ramee, and D is 30 μm, and resin is acrylic resin；L is 253 μm
(resin is attached on a diameter of 253 μm of the diameter after monfil 1, i.e. resin matrix), F is 293.1mN.
According to τ=F/ π DL, therefore the composite material interface shear strength τ of final gained is 12.3Mpa.
Experiment four, the material of 4# monfil are basalt fibre, and D is 7 μm, and resin is vinylite；L is 43 μm
(resin is attached on a diameter of 43 μm of the diameter after monfil 1, i.e. resin matrix), F is 60.489mN.
According to τ=F/ π DL, therefore the composite material interface shear strength τ of final gained is 64Mpa.
Confirmatory experiment：
The micro- unsticking method of accuracy of detection highest that the material tested described in one~experiment four is generally acknowledged according to the current industry
Detected, acquired results are respectively：61.3Mpa、71.6Mpa、12.1Mpa、64.4Mpa.
Contrast experiment one, according to the current existing single fiber interface shear strength test device informed in background technology,
Material described in experiment one is detected, gained detection data are：F (single fiber applies the peak value of pulling force)=57.2mN；D is (fine
Tie up diameter)=7 μm；L=is embedded to 46 μm of the length of fiber, and the calculation of its foundation is：τ=F/ π dL, therefore acquired results
For：56.6MPa.
Contrast experiment two, the setting for the display 2 (microscopy device) cancelled in embodiment 1, remaining is equal to implementation
Example 1.Material described in experiment one is detected with this gained detection means：
Detect that the data obtained is：D is 7 μm, a diameter of 47 μm of resin matrix, and F is 57.8mN.L is with experiment one.
Therefore, τ is 55.95Mpa.
The detection means is due to lacking microscopy device, therefore presence can not accurately test resin matrix diameter
Defect.
Contrast experiment three, the setting of the chamfering of the clamp port for the auxiliary clamp 5 cancelled in embodiment 1, remaining is equal to reality
Apply example 1.Material described in experiment one is detected with this gained detection means：
Detect that the data obtained is：D is 7 μm, a diameter of 45 μm of resin matrix, and F is 57.8mN.L is with experiment one.
Therefore, τ is 58.43Mpa.
There is monfil and draw in the detection means due to the clamp port of auxiliary clamp 5 is not provided with chamfering
Fashionable surface abrasion produces test error, is even clamped the defect that the metal edge of mouth is cut off.
Contrast experiment four, make the auxiliary clamp 5 that the metal in embodiment 1 is made into auxiliary clamp 5 that plastics are made, its
It is remaining to be equal to embodiment 1.Material described in experiment one is detected with this gained detection means：
Detect that the data obtained is：D is 7 μm, a diameter of 45 μm of resin matrix, and F is 58.1mN.L is with experiment one.
Therefore, τ is 58.74Mpa.
There is fixture and be easy in test process in the detection means due to auxiliary clamp 5 is made of plastic
Produce micro-strain, cause data the defect of deviation occur.
Finally, in addition it is also necessary to it is noted that listed above is only several specific embodiments of the present utility model.Obviously,
The utility model is not limited to above example, can also there is many deformations.One of ordinary skill in the art can be new from this practicality
All deformations that type disclosure is directly exported or associated, are considered as protection domain of the present utility model.
Claims (6)
1. single fiber interface shear strength test device, including filament stretch instrument (10), clamp tool (11), dynamic fixture (12), its
It is characterized in：The test device also includes single fiber pull-out servicing unit；
The single fiber pull-out servicing unit includes mounting assembly, auxiliary clamp (5), display (2) and flexible regulatory component；
The mounting assembly is made up of sliding support (8), hold-down support (9) and base-plate (7)；The two of base-plate (7)
End sets sliding support (8) and hold-down support (9) respectively, and the sliding support (8) is slided with base-plate (7) to be connected, fixed
Bearing (9) is fixedly linked with base-plate (7)；
Display (2) is set on auxiliary clamp (5)；
One flexible regulatory component is respectively set in the both sides of auxiliary clamp (5), two flexible regulatory components are relative to auxiliary clamp
(5) it is symmetrical into minute surface；
Each flexible regulatory component is by the telescopic end (3) being arranged in order, fixing end sleeve pipe (6) and the round end (4) containing scale
Composition, round end (4) of the local sleeve in fixing end sleeve pipe (6) is connected with fixing end sleeve pipe (6) screw thread, and local sleeve is mounted in solid
Telescopic end (3) in fixed end sleeve pipe (6) is fixedly linked with round end (4)；Telescopic end (3) is connected with auxiliary clamp (5)；
Fixing end sleeve pipe (6) in one flexible regulatory component is fixedly linked with sliding support (8), another flexible regulatory component
In fixing end sleeve pipe (6) be fixedly linked with hold-down support (9).
2. single fiber interface shear strength test device according to claim 1, it is characterized in that：
The auxiliary clamp (5) is constituted by two into the symmetrical up big and down small chamfer of minute surface is trapezoidal, and two chamfers are trapezoidal
Hypotenuse cooperatively form the clamp ports of auxiliary clamp (5).
3. single fiber interface shear strength test device according to claim 2, it is characterized in that：
Display (2) is microscopy device.
4. according to any described single fiber interface shear strength test device of claims 1 to 3, it is characterized in that：
The inwall of fixing end sleeve pipe (6) is provided with internal thread, and the outer wall of round end (4) is provided with what is matched with the internal thread
External screw thread；By internal thread and externally threaded cooperation, round end (4) realizes that screw thread is connected with fixing end sleeve pipe (6).
5. according to any described single fiber interface shear strength test device of claims 1 to 3, it is characterized in that：
The precision of round end (4) high scale is 0.001mm.
6. according to any described single fiber interface shear strength test device of claims 1 to 3, it is characterized in that：
The clamp port of auxiliary clamp (5) sets chamfering.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106596296A (en) * | 2017-02-25 | 2017-04-26 | 浙江理工大学 | Single fiber interfacial shear strength testing method and device |
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| CN106596296A (en) * | 2017-02-25 | 2017-04-26 | 浙江理工大学 | Single fiber interfacial shear strength testing method and device |
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