CN109795131A - A kind of carbon fiber/cyanate composite material pipe fitting and preparation method thereof - Google Patents
A kind of carbon fiber/cyanate composite material pipe fitting and preparation method thereof Download PDFInfo
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- CN109795131A CN109795131A CN201711139248.6A CN201711139248A CN109795131A CN 109795131 A CN109795131 A CN 109795131A CN 201711139248 A CN201711139248 A CN 201711139248A CN 109795131 A CN109795131 A CN 109795131A
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- carbon fiber
- pipe fitting
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Abstract
The present invention relates to space camera technical fields, specifically disclose a kind of carbon fiber/cyanate composite material pipe fitting and preparation method thereof.Pipe fitting of the invention is integrally formed by prepreg placement process by low coefficient of thermal expansion carbon fiber/cyanate composite material and is made, there is no interface problems, it can be used in space optics truss structure, truss structure environmental stability can be improved, precision, stability influence for improvement variation of ambient temperature to space optics structure, be of great significance, solve the swollen property of existing metallic pipe coupling low-heat and two aspect performance of high specific strength can not both with technological deficiency.
Description
Technical field
The present invention relates to space camera technical field, in particular to a kind of truss structure carbon fiber/cyanate composite wood
Expects pipe connector and preparation method thereof.
Background technique
Mainstream structure of the truss structure as space camera, it is often desirable that it is with low coefficient of thermal expansion: become in environment temperature
Stable structure when change does not influence imaging precision, stability.
Truss rod structure generallys use composite material, can be by selection fiber, resin and laying angle, in rod piece axis
To the low or zero thermal expansion of acquisition.
Truss pipe fitting, since structure, load condition are complicated, common used material is aluminium alloy, titanium alloy, low-heat is swollen system
Number alloy.Aluminium alloy, titanium alloy loading ability are high, can be processed into the pipe fitting of complicated shape, but material itself heat expansion system
Number is big (2.3 × 10-5/ DEG C of aluminium alloy coefficient of thermal expansion, 9.4 × 10-5/ DEG C of titanium alloy coefficient of thermal expansion).Low coefficient of thermal expansion alloy, heat
Swollen coefficient is low (such as invar, coefficient of thermal expansion 0), however density is larger, and specific strength is low, specific stiffness is low.
Summary of the invention
The present invention is directed to overcome, the swollen property of metallic pipe coupling low-heat can not be simultaneous with two aspect performance of high specific strength in the prior art
The technological deficiency of tool provides a kind of novel truss structure carbon fibre reinforced pipe connector and preparation method thereof.
To achieve the above object, the invention adopts the following technical scheme:
On the one hand, the present invention provides a kind of carbon fiber/cyanate composite material pipe fitting, and the pipe fitting is by the swollen system of low-heat
Number carbon fiber/cyanate composite material is integrally formed by prepreg placement process and is made.The composite pipe joint can be used for
In the truss structure of space camera.
In some embodiments, the pipe fitting on pipe fitting axial direction thermal expansion factor absolute value less than 1 × 10-6/K。
In some embodiments, the low coefficient of thermal expansion carbon fiber/cyanate composite material, in 0 ° of direction coefficient of thermal expansion of single layer
For α1, -1 × 10-6/ K < α1< 1 × 10-6/K；It is α in 90 ° of direction coefficient of thermal expansions of single layer2, 15 × 10-6/ K < α2< 35 × 10-6/K。
In some embodiments, the carbon fiber/cyanate composite material is by high-strength carbon fiber/cyanate ester material and Gao Mo
Type carbon fiber/cyanate ester material is mixed to get.
In some embodiments, in the high-strength carbon fiber/cyanate ester material intensity of carbon fiber be 2000MPa~
4000MPa, modulus are 200GPa~300GPa；The modulus of carbon fiber exists in the high model carbon fiber/cyanate ester material
300GPa or more.
In some embodiments, the laying angle of the carbon fiber/cyanate composite material is (02/±θ)n, 60 °≤θ≤
80°。
In some embodiments, with carbon fiber/cyanate composite material volume for 100%, the carbon fiber/cyanate is multiple
In condensation material, the volume content of carbon fiber is 57%~63%.
Yet another aspect, the present invention provide a kind of preparation method of above-mentioned pipe fitting, the preparation method include: S1,
According to laying angle and sequence, laying cyanate/carbon fiber prepreg on mold；S2, pass through metal to mould or vacuum bag method
It is compacted laying；S3, entirety enter furnace curing molding and obtain the pipe fitting.
In some embodiments, the mold is metal positive.
In some embodiments, the cyanate/carbon fiber prepreg is by high-strength carbon fiber/cyanate prepreg and Gao Mo
Type carbon fiber/two kinds of cyanate prepreg prepreg is mixed to prepare.
The beneficial effects of the present invention are: low coefficient of thermal expansion carbon fiber/cyanate composite material pipe fitting of the invention leads to
It crosses integrated molding solidification to obtain, interface problem is not present, can be used in space optics truss structure, truss structure environment can be improved
Stability, precision, stability influence for improvement variation of ambient temperature to space optics structure, is of great significance.
In carbon fiber provided by the invention/cyanate composite material pipe fitting, carbon fiber/cyanate prepreg is using high-strength
Type carbon fiber/cyanate prepreg and high model carbon fiber/cyanate prepreg mix use, axial to use high model carbon fiber
Low coefficient of thermal expansion is contributed, circumferential direction is high-intensitive using the contribution of high-strength carbon fiber.Taking into account low thermal expansion properties and high specific strength performance
While, preferably solve in forming process that there are the pipe fitting problem of Cracking that internal stress may cause in pipe fitting.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, to this
Invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, without structure
At limitation of the present invention.
The present invention provides a kind of truss structure carbon fiber/cyanate composite material pipe fitting, and the pipe fitting is swollen by low-heat
Coefficient carbon fiber/cyanate composite material is integrally formed by prepreg placement process and is made.Be integrally formed obtain product without
Splicing face and fiber continuity is good, product mechanical property is more excellent, reliability is higher.
In specific embodiment, pipe fitting of the invention on pipe fitting axial direction thermal expansion factor absolute value less than 1 × 10-6/
K.Especially by using the carbon fiber with typically negative thermal expansion coefficient, after forming single layer with resin matrix, 0 ° of direction heat
Swollen coefficient is α1, -1 × 10-6/ K < α1< 1 × 10-6/ K is α in 90 ° of direction coefficient of thermal expansions of single layer2, 15 × 10-6/ K < α2<
35×10-6/ K can make laminate X to coefficient of thermal expansion absolute value less than 1 × 10 by designing laying-6/ K, so that pipe fitting exists
Thermal expansion factor absolute value is less than 1 × 10 on pipe fitting axial direction-6/K。
Wherein, carbon fiber/cyanate composite material is by high-strength carbon fiber, high model carbon fiber and cyanate ester resin matrix
Two kinds of individual prepregs are obtained by sweat connecting method, high model carbon fiber/cyanate prepreg is as 0 ° of layer, high-strength carbon
Fiber/cyanate prepreg molds (or vacuum bag method) as θ ° of layer according to designed laying angle and sequence laying forming
Solidification.Specifically, high-strength carbon fiber is selected from Japanese Koryo company's T 300B, T400HB, T700SC, T800HB or HF40A type carbon
At least one of fiber, high model carbon fiber are selected from Japanese Koryo company M35JB, M40JB, M46JB, M55JB or M60JB type
At least one of carbon fiber selects such composite material collocation to use, and pipe fitting obtained can have low heat expansion,
There can be high specific strength again.
In specific embodiment, carbon fiber/cyanate composite material laying angle is (02/±θ)n, 60 °≤θ≤80 °, lead to
Cross using such laying angle can reduce process implementing during laying angular error to product axial thermal expansion coefficient
It influences.Meanwhile interiors of products after forming and hardening can be reduced with the use of two kinds of carbon fibers/cyanate prepreg selected above
The radial internal stress of fiber and resin boundary surface.For the present invention by using carbon fiber/cyanate composite material, designability is strong,
By adjusting laying angle, low expansion character can be obtained in particular directions.
Carbon fiber/laying angle of cyanate composite material selection and the carbon fiber of selection are that the present inventor is logical
It crosses and makes the creative labor acquisition, laying angular error is to product axial thermal expansion coefficient during can reduce process implementing
Influence, reduce the radial internal stress of interiors of products fiber and resin boundary surface after forming and hardening.
In carbon fiber/cyanate composite material used in pipe fitting of the invention, with carbon fiber/cyanate composite material
Volume be 100%, the volume content of carbon fiber is 57%~63%, enables to every power of the composite material finally obtained
It learns performance indicator to be optimal, is equalized tension and compression, Interlaminar shear strengths.
Yet another aspect, the present invention provide a kind of preparation method of above-mentioned pipe fitting, preparation method include: S1, according to
Laying angle and sequence, laying cyanate/carbon fiber prepreg on mold, specific prepreg pass through sweat connecting legal system
It is standby；S2, laying is compacted to mould or vacuum bag method by metal；S3, entirety enter furnace curing molding and obtain pipe fitting.Specifically, step
Mould therefor is metal positive in rapid S1, and cyanate/carbon fiber prepreg of laying is by high-strength carbon fiber/cyanate prepreg
It is mixed to prepare with high modulus carbon fiber/two kinds of cyanate prepreg prepreg, so that pipe fitting obtained can have low-heat swollen
Swollen property, and can have high specific strength.
Carbon fiber/cyanate composite material of the invention is compared during the preparation process by using prepreg placement process
For winding process, fiber volume fraction can be preferably controlled, to improve product mechanical property.
Low coefficient of thermal expansion carbon fiber/cyanate composite material pipe fitting of the invention is obtained, no by being integrally formed solidification
There are interface problems, can be used in space optics truss structure, and truss structure environmental stability can be improved, for improving environment temperature
Precision of the degree variation to space optics structure, stability influence, are of great significance.
In carbon fiber provided by the invention/cyanate composite material pipe fitting, carbon fiber/cyanate prepreg is using high-strength
Degree carbon fiber/cyanate prepreg and high modulus carbon fiber/cyanate prepreg mix use, axial to use high modulus carbon fiber
Low coefficient of thermal expansion is contributed, circumferential direction is high-intensitive using high-strength carbon fiber contribution, is taking into account low thermal expansion properties and high specific strength performance
While, preferably solve in forming process that there are the pipe fitting problem of Cracking that internal stress may cause in pipe fitting.
It is described in detail below in conjunction with specific embodiment.
Embodiment 1
S1, according to [02/±66]4Laying angle and sequence, laying cyanate/carbon fiber is pre- on metal positive mold
Leaching material, 0 ° of laying are high model carbon fiber/cyanate prepreg, and thickness 0.15mm, 66 ° of layings are high-strength carbon fiber/cyanic acid
Ester prepreg, thickness are 0.125mm；Wherein, high model carbon fiber uses toray company M55JB, high-strength carbon fiber
For Japanese Koryo company's T 800HB；S2, pass through metal to the real laying of molding；S3, it will integrally enter furnace curing molding and obtain pipe fitting.
After tested, the pipe fitting axial direction coefficient of thermal expansion of pipe fitting obtained is -0.337 × 10-6/ K, hoop rigidity are
55.02GPa, pipe fitting does not occur cracking phenomena in forming process.
Embodiment 2
S1, according to [02/±68]4Laying angle and sequence, laying cyanate/carbon fiber is pre- on metal positive mold
Leaching material, 0 ° of laying are high model carbon fiber/cyanate prepreg, and thickness 0.15mm, 68 ° of layings are high-strength carbon fiber/cyanic acid
Two kinds of prepregs of ester prepreg are according to thickness is 0.125mm；Wherein, high modulus carbon fiber is using Japanese Koryo company
M55JB, high-strength carbon fiber are Japan Koryo company's T 700SC；S2, pass through metal to the real laying of molding；S3, furnace will integrally be entered
Curing molding obtains pipe fitting.
After tested, the pipe fitting axial direction coefficient of thermal expansion of pipe fitting obtained is -0.296 × 10-6/ K, hoop rigidity are
58.03GPa, pipe fitting does not occur cracking phenomena in forming process.
Embodiment 3
S1, according to [02/±61]3Laying angle and sequence, laying cyanate/carbon fiber is pre- on metal positive mold
Leaching material, 0 ° of laying are high-strength carbon fiber/cyanate prepreg, and thickness 0.2mm, 61 ° of layings are high model carbon fiber/cyanate
Prepreg, thickness are 0.1mm；Wherein, high modulus carbon fiber uses Japan Koryo company M40JB, and high-strength carbon fiber is day
This Koryo company's T 700SC；S2, pass through metal to the real laying of molding；S3, it will integrally enter furnace curing molding and obtain pipe fitting.
After tested, the pipe fitting axial direction coefficient of thermal expansion of pipe fitting obtained is -0.0687 × 10-6/ K, hoop rigidity are
28.57GPa, pipe fitting does not occur cracking phenomena in forming process.
Embodiment 4
S1, according to [02/±80]4Laying angle and sequence, laying cyanate/carbon fiber is pre- on metal positive mold
Leaching material, 0 ° of laying are high-strength carbon fiber/cyanate prepreg, and thickness 0.15mm, 80 ° of layings are high model carbon fiber/cyanic acid
Ester prepreg, thickness are 0.1mm；Wherein, high modulus carbon fiber uses Japan Koryo company M55JB, and high-strength carbon fiber is
Japanese Koryo company's T 700SC；S2, pass through metal to the real laying of molding；S3, it will integrally enter furnace curing molding and obtain pipe fitting.
After tested, the pipe fitting axial direction coefficient of thermal expansion of pipe fitting obtained is -0.158 × 10-6/ K, hoop rigidity are
47.75GPa, pipe fitting does not occur cracking phenomena in forming process.
Embodiment 5
S1, according to [02/±60]3Laying angle and sequence, laying cyanate/carbon fiber is pre- on metal positive mold
Leaching material, 0 ° of laying are high-strength carbon fiber/cyanate prepreg, and thickness 0.15mm, 60 ° of layings are high model carbon fiber/cyanic acid
Ester prepreg, thickness are 0.15mm；Wherein, high modulus carbon fiber uses Japan Koryo company M40JB, and high-strength carbon fiber is
Japanese Koryo company's T 700SC；S2, pass through metal to the real laying of molding；S3, it will integrally enter furnace curing molding and obtain pipe fitting.
After tested, the coefficient of thermal expansion of pipe fitting obtained is -0.222 × 10-6/ K, hoop rigidity 36.57GPa, molding
Pipe fitting does not occur cracking phenomena in the process.
To sum up, in carbon fiber provided by the invention/cyanate composite material pipe fitting, carbon fiber/cyanate preimpregnation
Material mixes use using high-strength carbon fiber/cyanate prepreg and high modulus carbon fiber/cyanate prepreg, axial using high
Modulus carbon fiber contributes low coefficient of thermal expansion, circumferential high-intensitive using high-strength carbon fiber contribution, is taking into account low thermal expansion properties and height
While specific strength performance, preferably solve in forming process that there are the pipe fittings that internal stress may cause to open in pipe fitting
Split problem.
The above described specific embodiments of the present invention are not intended to limit the scope of the present invention..Any basis
Any other various changes and modifications made by technical concept of the invention should be included in the guarantor of the claims in the present invention
It protects in range.
Claims (10)
1. a kind of carbon fiber/cyanate composite material pipe fitting, which is characterized in that the pipe fitting is by low coefficient of thermal expansion carbon fiber
Dimension/cyanate composite material is integrally formed by prepreg placement process and is made.
2. pipe fitting as described in claim 1, which is characterized in that pipe fitting coefficient of thermal expansion on pipe fitting axial direction is exhausted
To value less than 1 × 10-6/K。
3. pipe fitting as described in claim 1, which is characterized in that the low coefficient of thermal expansion carbon fiber/cyanate composite material,
It is α in 0 ° of direction coefficient of thermal expansion of single layer1, -1 × 10-6/ K < α1< 1 × 10-6/K；It is α in 90 ° of direction coefficient of thermal expansions of single layer2, 15
×10-6/ K < α2< 35 × 10-6/K。
4. pipe fitting as described in claim 1, which is characterized in that the carbon fiber/cyanate composite material is by high-strength carbon
Fiber/cyanate ester material is mixed to get with high model carbon fiber/cyanate ester material.
5. pipe fitting as claimed in claim 4, which is characterized in that carbon fiber in the high-strength carbon fiber/cyanate ester material
Intensity be 2000MPa~4000MPa, modulus be 200GPa~300GPa；Carbon in the high model carbon fiber/cyanate ester material
The modulus of fiber is in 300GPa or more.
6. pipe fitting as described in claim 1, which is characterized in that the laying angle of the carbon fiber/cyanate composite material
It is (02/±θ)n, 60 °≤θ≤80 °.
7. pipe fitting as described in claim 1, which is characterized in that be with carbon fiber/cyanate composite material volume
100%, in the carbon fiber/cyanate composite material, the volume content of carbon fiber is 57%~63%.
8. a kind of preparation method of pipe fitting as described in claim 1, which is characterized in that the preparation method includes:
S1, according to laying angle and sequence, laying cyanate/carbon fiber prepreg on mold；
S2, laying is compacted to mould or vacuum bag method by metal；
S3, entirety enter furnace curing molding and obtain the pipe fitting.
9. preparation method as described in claim 1, which is characterized in that the mold is metal positive.
10. preparation method as described in claim 1, which is characterized in that the cyanate/carbon fiber prepreg is by high-strength carbon
Fiber/cyanate prepreg is mixed to prepare with high model carbon fiber/two kinds of cyanate prepreg prepreg.
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| CN201711139248.6A CN109795131A (en) | 2017-11-16 | 2017-11-16 | A kind of carbon fiber/cyanate composite material pipe fitting and preparation method thereof |
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