CN104913975B - Biaxial tension test testpieces of ribbon matrix fibre bundle and preparation method thereof - Google Patents

Biaxial tension test testpieces of ribbon matrix fibre bundle and preparation method thereof Download PDF

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CN104913975B
CN104913975B CN201510266712.2A CN201510266712A CN104913975B CN 104913975 B CN104913975 B CN 104913975B CN 201510266712 A CN201510266712 A CN 201510266712A CN 104913975 B CN104913975 B CN 104913975B
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fibre bundle
ribbon matrix
biaxial tension
drag reduction
test
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CN104913975A (en
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于国强
宋迎东
高希光
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Nanjing University of Aeronautics and Astronautics
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Nanjing University of Aeronautics and Astronautics
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Abstract

The invention discloses the biaxial tension test testpieces of ribbon matrix fibre bundle, including strip sample, wherein:Strip sample is made up of fiber cloth depositing base, strip sample center section is test department, two ends are clamping part, there was only warp fiber in test department, and warp fiber is along strip specimen width direction period profile, clamping part is braiding structure, and the two sides of the compressed load loading of test department are fixed with drag reduction rubber, the length of drag reduction rubber is identical with test department length, and compressive load loading head is fixed with the outside of drag reduction rubber.The present invention has the advantages that making is simple, experimental cost is low, testpieces quality is good, be not susceptible to Compressional buckling.

Description

Biaxial tension test testpieces of ribbon matrix fibre bundle and preparation method thereof
Technical field
The present invention relates to Compound Material Engineering testing field, and in particular to the biaxial tension test testpieces of ribbon matrix fibre bundle and Its preparation method.
Background technology
Ribbon matrix fibre bundle is the main load-carrying construction in composite.Research shows the macromechanics behavior of composite And the mechanical property of thin sight failure procedure and ribbon matrix fibre bundle is closely related.In recent years, with the multiple dimensioned meter of composite The rise of calculation method, using ribbon matrix fibre bundle as small composite so that the mechanical property to composite is furtherd investigate Method turn into composite Multi-Scale Calculation field in popular problem.Ribbon matrix fibre bundle is typically in the composite Multiaxis coupling stress state, wherein one of common stress state is tension and compression stress state, therefore it is real only to carry out biaxial tension test The mechanical property of ribbon matrix fibre bundle could be furtherd investigate by testing.
At present, the stretching for tow material is primarily present in the prior art(Chinese patent CN101949797B, one Kind of testing micro-tensile mechanical properties of metal fiber method and device, Chinese patent CN102426135B, a kind of carbon fiber multifilament and Carbon fiber cable extension test fixture auxiliary tool), compression(Chinese patent CN100561176C, fibrous material transverse compression The measuring method and device of performance, Chinese patent CN101650282B, the measuring method and dress of a kind of monofilament fiber compression performance Put)Etc. test method, the report for tow material biaxial tension test test method is had no.Because ribbon matrix tow material exists It is less bar-shaped for diameter in form, therefore be difficult that biaxial tension test experiment directly is carried out to ribbon matrix fibre bundle.
For non-fiber strand material, biaxial tension test experimental method typically uses cross biaxial tension test sample(It is Chinese special Sharp CN103267672B,《A kind of twin shaft plate tension and compression CYCLIC LOADING tests anti-bending system and method》), square tabular twin shaft draws Press sample(Chinese patent CN104316393A,《Loading device and method for material biaxial tension-compression strength》)Or square block Shape biaxial tension test sample(Chinese patent CN201955268U,《A kind of loading test device of concrete biaxial tension and compression》).Cross Shape biaxial tension test sample generally requires additional anti-Compressional buckling device(Chinese patent CN103267672B,《A kind of twin shaft plate is drawn CYCLIC LOADING is pressed to test anti-bending system and method》)Prevent sample from unstability occurring under compressive loading.Square tabular biaxial tension test Specimen size is big, and the material consumed in experiment is more, adds the cost of batch experiment.Square bulk biaxial tension test sample is used The mode of splicing transmits axial tensile loads, can not effectively add for the higher fibre reinforced composites this method of tensile strength Carry.Therefore, it is difficult to carry out ribbon matrix fibre bundle biaxial tension test experiment by prior art.
The content of the invention
The technical problems to be solved by the invention are to be directed to the above-mentioned state of the art, and supply one kind to make simple, experimental cost It is low, testpieces quality is good, the biaxial tension test testpieces that is not susceptible to Compressional buckling and preparation method thereof.
The present invention solve the technical scheme that is used of above-mentioned technical problem for:
The biaxial tension test testpieces of ribbon matrix fibre bundle, including strip sample, wherein:Strip sample is sunk by fiber cloth Product matrix is constituted, and strip sample center section is test department, and two ends are there was only warp fiber in clamping part, test department, and Warp fiber is along strip specimen width direction period profile, and clamping part is braiding structure, the compressed load loading of test department Two sides are fixed with drag reduction rubber, and the length of drag reduction rubber is identical with test department length, and compression is fixed with the outside of drag reduction rubber Load loading head.
For optimization above-mentioned technical proposal, the concrete measure taken also includes:
Drag reduction rubber is adhesively fixed by glue with test department.
Compressive load loading head is fixed by glue with drag reduction rubber bound.
The thickness of drag reduction rubber is identical with test department thickness.
Compressive load loading head is T-shaped load loading head.
A kind of preparation method of the biaxial tension test testpieces of ribbon matrix fibre bundle, comprises the following steps:
Step 1: preparing the individual layer precast body of ribbon matrix fibre bundle:By the weft fiber of control of two-dimensional braided fiber cloth interlude Extract out, leave behind warp fiber;It can not upset the periodicity of warp fiber when extracting weft fiber;
Step 2: getting up and being fixed on mould the fiber cloth through-thickness obtained in step one stacking, sink repeatedly Product matrix obtains ribbon matrix fibre bundle flat board;
Step 3: the ribbon matrix fibre bundle flat board after processing depositing base obtains strip sample;
Step 4: drag reduction rubber is fixed in the middle of the strip sample at the compressive load loading of test department both sides;
Step 5: fixing the biaxial tension test experiment that compressive load loading head obtains ribbon matrix fibre bundle in drag reduction rubber outer side Part.
Compared with prior art, biaxial tension test testpieces of ribbon matrix fibre bundle of the invention and preparation method thereof, beneficial Effect is:
(1) present invention can realize the biaxial tension test experiment of ribbon matrix fibre bundle.Elongated straps matrix fiber beam twin shaft is drawn Pressure sample more saves experiment material than cross biaxial tension test sample and square tabular biaxial tension test sample, reduces and criticizes Measure the cost of experiment.
(2) size of the elongated straps matrix fiber beam biaxial tension test sample that the present invention is used in compressive load action direction It is small, therefore unstability will not occur for sample without the anti-Compressional buckling device of additional sample under compressive load effect, simplify Compressive load loading device, improves the reliability of experiment.
(3) the drag reduction rubber that the present invention is used can reduce the axial resistance between sample and compressive load loading head, because The measurement result of this axial load is more accurate.
Brief description of the drawings
Fig. 1 is the fiber cloth schematic diagram for not extracting weft fiber;
Fig. 2 is the fiber cloth schematic diagram after extraction weft fiber;
Fig. 3 is strip sample;
Fig. 4 is ribbon matrix fibre bundle biaxial tension test sample(Arrow represents loading direction in figure);
Fig. 5 is the flow chart that periodicity principle of the present invention prepares sample.
In figure:1- warp fibers, 2- weft fibers, 3- strips sample, at 3-1- compressive load loadings, 3-2- axially draws Stretch load loading end, 4- compressive loads loading head, 5- drag reduction rubber.
Embodiment
Embodiments of the invention are described in further detail below in conjunction with the accompanying drawings.
The preparation method of the biaxial tension test testpieces of ribbon matrix fibre bundle of the present invention, comprises the following steps:
Step 1: preparing the individual layer precast body of ribbon matrix fibre bundle using periodicity principle.In order to ensure tape base in sample The form of body fibre bundle is consistent with the form in true composite, by control of two-dimensional braided fiber cloth(Fig. 1)The broadwise of interlude is fine Dimension 2 is extracted out, leaves behind warp fiber 1, should not upset the periodicity of warp fiber during extracting weft fiber;
Step 2: by the fiber cloth obtained in step one(Fig. 2)Through-thickness stacking is got up and is fixed on mould, instead Multiple depositing base obtains ribbon matrix fibre bundle flat board;
Step 3: the ribbon matrix fibre bundle flat board after processing depositing base obtains strip sample 3;
Step 4: 3-1 symmetrically pastes drag reduction rubber at the compressive load loading of the middle test department both sides of strip sample 3 5;
Step 5: pasting the twin shaft drawing that T-shaped compressive load loading head 4 obtains ribbon matrix fibre bundle in the outside of drag reduction rubber 5 Press testpieces(Fig. 4);
During experiment, applying pressure at compressive load loading at 3-1, pulling force applied in axial tensile loads loading end 3-2, Realize and the biaxial tension test of test department is tested.
It is noted that in the experiment of ribbon matrix fibre bundle, the fibre bundle of testpieces tensile load action direction is determined Justice is warp fiber, and fibre bundle normal thereto is weft fiber.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art For member, some improvement can also be made under the premise without departing from the principles of the invention, and these improvement also should be regarded as the present invention's Protection domain.

Claims (6)

1. the biaxial tension test testpieces of ribbon matrix fibre bundle, including strip sample (3), it is characterized in that:Described strip examination Sample (3) is made up of the control of two-dimensional braided fiber cloth depositing base after extraction interlude weft fiber, in described strip sample (3) Between be partly test department, two ends are clamping part, only warp fiber (1) in test department, and warp fiber (1) is tried along strip Sample (3) width period profile, clamping part is braiding structure, and the two sides of the compressed load loading of described test department are fixed There is drag reduction rubber (5), the length of described drag reduction rubber (5) is identical with test department length, the outside of described drag reduction rubber (5) It is fixed with compressive load loading head (4).
2. the biaxial tension test testpieces of ribbon matrix fibre bundle according to claim 1, it is characterized in that:Described drag reduction rubber (5) it is adhesively fixed by glue with test department.
3. the biaxial tension test testpieces of ribbon matrix fibre bundle according to claim 1, it is characterized in that:Described compressive load Loading head (4) is adhesively fixed by glue with drag reduction rubber (5).
4. the biaxial tension test testpieces of ribbon matrix fibre bundle according to claim 1, it is characterized in that:Described drag reduction rubber (5) thickness is identical with test department thickness.
5. the biaxial tension test testpieces of ribbon matrix fibre bundle according to claim 1, it is characterized in that:Described compressive load Loading head (4) is T-shaped load loading head.
6. a kind of preparation method of the biaxial tension test testpieces of ribbon matrix fibre bundle, it is characterized in that:Comprise the following steps:
Step 1: preparing the individual layer precast body of ribbon matrix fibre bundle:The weft fiber (2) of control of two-dimensional braided fiber cloth interlude is taken out Go out, leave behind warp fiber (1);The periodicity of warp fiber (1) can not be upset when extracting weft fiber (2);
Step 2: getting up and being fixed on mould the fiber cloth through-thickness obtained in step one stacking, base is deposited repeatedly Body obtains ribbon matrix fibre bundle flat board;
Step 3: the ribbon matrix fibre bundle flat board after processing depositing base obtains strip sample (3);
Step 4: fixing drag reduction rubber (5) at the compressive load loading of the middle test department both sides of strip sample (3);
Step 5: fixed compressive load loading head (4) obtains the biaxial tension test examination of ribbon matrix fibre bundle on the outside of drag reduction rubber (5) Test part.
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CN110108567B (en) * 2019-06-25 2020-06-16 南京航空航天大学 Ceramic matrix composite interlaminar tensile test piece, and preparation method and test method thereof
CN111272650A (en) * 2020-03-02 2020-06-12 广西师范大学 Joint for testing failure criterion of composite material bonding structure
CN111855398B (en) * 2020-06-09 2021-06-29 北京航空航天大学 Biaxial stress state test piece is realized in unipolar loading of face of cylinder working section
CN113092207B (en) * 2021-04-02 2022-09-27 凯尔测控试验系统(天津)有限公司 Method for manufacturing conductive adhesive film sample for in-plane biaxial tensile property test

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