CN1326686C - Process for preparing mixing material of actively deformed - Google Patents
Process for preparing mixing material of actively deformed Download PDFInfo
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- CN1326686C CN1326686C CNB2005100102010A CN200510010201A CN1326686C CN 1326686 C CN1326686 C CN 1326686C CN B2005100102010 A CNB2005100102010 A CN B2005100102010A CN 200510010201 A CN200510010201 A CN 200510010201A CN 1326686 C CN1326686 C CN 1326686C
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Abstract
The present invention provides a method for preparing actively deformed mixing composite materials. A flaky sectional material is used for heating a shape memory alloy and removing residual stress, the memory training operation of the shape memory alloy is performed within certain range, the surface of the shape memory alloy is treated, an oxidation film of the surface of the shape memory alloy is removed through buffing, and the insulating treatment operation on the surface of the shape memory alloy is performed as required; the pre-immersed material of the cut composite material is spread in a mould, and the shape memory alloy is spread in the pre-immersed material of the composite material adjacent to the upper end of the mould which is tightly closed and is solidified on a hot press according to the solidifying curve of the composite material provided by a composite material producing manufacturer; after the mould is opened, technological processes such as electrical connection, etc. are performed to the shape memory alloy. The materials which have integral functions and are prepared by using the method of the present invention are used on some actuating mechanisms so that the weight and the volume are greatly reduced, and the composite material has good corrosion resistance so that the present invention has important application backgrounds in some special occasions.
Description
(1) technical field
That the present invention relates to is a kind of preparation method of hybrid composite, specifically a kind of preparation method about marmem (SMA) hybrid composite.
(2) background technology
The key that marmem (SMA) hybrid composite function realizes is to select suitable material to constitute, and the composite function is the direct output result who embeds the thermal deformation process of SMA.The recovery stress that the SMA phase transformation produces is the problem that people are concerned about most, not only will consider its size, because it is related to the movement range of material, also will consider the SMA width that recovery stress lags behind in the thermal cycle process, because the sensitivity level of its decision material.
(3) summary of the invention
The object of the present invention is to provide a kind of by marmem embedded mode and to its driving, can realize that composite-material laminates deforms, the feature that has embodied intellectual material initiatively is out of shape the preparation method of hybrid composite.
The object of the present invention is achieved like this:
(1) selecting thickness for use is the laminar marmem of 0.2mm, with the marmem heating, removes the residual stress that produces in its production process;
(2) marmem is carried out certain limit, i.e. memory training in the 1%-2% scope;
(3) the marmem surface is handled, at first remove surface film oxide, and as required insulation processing is carried out on the marmem surface by polishing;
(4) material prepreg that cuts is spread in the mould, marmem is spread near in the material prepreg on the mould;
(5) close tight mould, the composite material solidification curve that provides according to the composite manufacturer merchant on hot press is cured;
(6) after the die sinking, marmem is electrically connected.
The present invention can also comprise some architectural features like this:
1, the temperature of the residual stress of removal described in the step (1) heating should be higher than the austenite end temp of this marmem.
2, the training step that carries out the memory training of certain limit described in the step (2) is: 4%-5% stretches alloy below the martensite end temp; Marmem after will being out of shape behind the constraint relief is heated to more than the austenite end temp, makes marmem be returned to original state fully; Treat that marmem is cooled to martensite start temperature and repeats the memory training that aforesaid operations is finished marmem for 20 times when following.
3, described in the step (3) marmem is carried out insulation processing, be that marmem was immersed among the general impregnating resin of JF-98B level 15 minutes fully, after finishing marmem hung on the plastic holding device 30 minutes, and made under the unnecessary resin flow.
4, described in the step (6) marmem being electrically connected, is that all marmems are connected in series, and uses metal platen to realize reliable the connection, and connection resistance is less than 0.01 ohm.
The prestrain size of SMA, factors such as distributing position in parent phase and quantity all can influence the performance of material.TiNiSMA studies maximum materials at present.The interface interaction of SMA and parent phase and the performance of SMA all can influence the stability of material.Because the circulation internal stress that embedding SMA produces in the excitation response process will be in the transmission at the interface of SMA and parent phase, this just requires, and the interface all has reliable stability under different temperatures.Except interfacial failure, the SMA of embedding also may lose efficacy, this may since do action or overheated due to.Failure phenomenon more complicated, many parameters all may be influential to it, as maximum temperature, and maximum stress, maximum strain, cycle-index, alloying component, heat treatment and processing technology etc.A very important conclusion (of pressure testing) is: the stability of SMA under the strain state of a control greater than under the Stress Control.In a word, become the self-adapting intelligent material that is similar to muscle behind the TiNi SMA embedded composite material, except applying active force or changing the planform, also can be used to change the rigidity or the stress state in the structure (usually producing local compression) of structure, initiatively to change the mode character of composite, obtain self-reinforced material or intelligent element.
Because SME, SMA are when recovery of shape, if be in free state, then it just produces action or strain; Suffer restraints if reply, then SMA will apply very big restoring force to obligatory point.For example, the TiNi alloy silk of homemade diameter 0.5mm (the Ti atom percentage content is 49.2%, and it is 3.84% that its maximum can be replied plastic strain) is under the situation that keeps 3.84% plastic deformation, and its maximum recovery stress value can reach 480MPa.In addition, SMA high 3～4 times under the modular ratio low-temperature martensite state under the high temperature austenite state, yield stress also increases.Therefore, SMA can be used to improve the strength and stiffness with control structure.And the material of this function one uses on some actuating mechanisms, weight reduction and volume greatly, and composite has good corrosion resistance, and making has important application background at some special occasions.
(4) description of drawings
Fig. 1 is the structural representation that is connected in series that adopts the product of the inventive method preparation;
The structural representation that Fig. 2 minor spiral pressing plate connects.
(5) specific embodiment
For a more detailed description to the present invention for example below:
1, the selection of marmem and section bar
The TiNi alloy is best a kind of of memory characteristic in the marmem of finding up to now.Because the elastic anisotropy of TiNi alloy is little, is difficult to produce big stress and concentrates at the crystal boundary place.So performance is more stable in thermal cycle or Cyclic Stress, Xun Huan life-span is long repeatedly.The average crystal grain size of TiNi alloy after solution treatment has only dozens of μ m, so it can be as copper-based memory alloy, and generation is broken at the crystal boundary place, and forming property is good.Select the section bar of different size according to the needs of design.The memorial alloy that uses among the present invention is for waiting TiNi alloy of atomic ratio.Owing to marmem will be embedded in the composite-material laminates, select the sheet material of thinner thickness more favourable, the TiNi marmem that uses among the present invention is thickness 0.2mm, the sheet material of width 4mm.Af is 60 ℃, before using the alloy water-bath is heated to 100 ℃, and purpose is to remove the residual stress that material produces in process.
2, the memory training of marmem
Marmem must carry out memory training before using.The method of training is: under martensitic state alloying element is deformed to the degree that estimation can recover, with the alloying element heating, makes it return to original distortion then, repeat to repeated multiple times above-mentioned distortion, heating, can obtain double process shape-memory effect.The method of training among the present invention is: below the martensite end temp alloy is stretched 4%
-5%; Marmem after will being out of shape behind the constraint relief is heated to more than the austenite end temp, makes marmem be returned to original state fully; Treat that marmem is cooled to martensite start temperature and repeats the memory training that aforesaid operations is finished marmem for 20 times when following.The shape memory alloy double-pass memory effect of method training can reach 1% thus.
3, the surface treatment of marmem
Owing to relate among the present invention marmem is embedded in the carbon fibre reinforced composite, marmem need be switched on and be realized driving, and carbon fiber is good conductor, add that applied pressure more makes carbon fiber and marmem produce excellent contact in solidifying engineering, so just caused the unexpected property of marmem at the material internal bind mode.Opposite extreme situations, marmem can't be realized driving function by short circuit fully at material internal.So, a technical process that marmem is insulated be arranged.Handle to such an extent that method is: be coated on the marmem surface with a kind of non-conductive resin before this, and treated this integral body shop is being gone into regelate generation active distressed structure in the layer of carbon fiber shop behind the completion of cure.Insulating resin has been selected the general impregnating resin of JF-98B level for use, and it is made up of heat resistant unsaturated polyester resin, modified epoxy, reactive diluent (styrene), initator, promoter etc., can solidify rapidly under 140～145 ℃ of conditions.Specific volume resistance is 1 * 10
13Ω gm.Be mainly used in the insulation processing of all kinds of middle and small motors, electric apparatus coil.During processing, at first marmem was immersed in fully among the resin 15 minutes, after finishing marmem was hung on the plastic holding device 30 minutes, make under the unnecessary resin flow.At last, baking oven is preheated the solidification temperature of impregnating resin, put into by the marmem of anchor clamps constraint and finish after 15 minutes.Good, simple to operate and with low cost through the marmem insulating properties that this method is handled.The general impregnating resin of JF-98B level that insulating resin has selected for use huge peak, Wujiang lacquer industry Co., Ltd to produce.
4, lay alloy, curing materials
The matrix material of selecting for use is the T300/HD03 prepreg.Epoxy resin (EP) matrix excellent combination property, good manufacturability, price is lower, is still the most general resin matrix of application at present.Domestic aircaft configuration and space structure mainly are the EP classes with the matrix of carbon fibre composite.The shop number of layers is 8 layers, and marmem is laid between the ground floor and the second layer, adopts hot press technology.The technology of resin solidification is the curing process in one three step, and at first the heating rate with 1.5～2.0 ℃/min of room temperature is heated to 90 ℃, constant temperature 30min; Continuation is heated to 130 ℃, constant temperature 30min with the heating rate of 1.5～2.0 ℃/min; Speed with 1.5～2.0 ℃/min is heated to 180 ± 5 ℃ subsequently, 150 ℃ of constant temperature.Most time-temperatures of resin solidification all are in more than the marmem austenite end temp, so need to use anchor clamps constraint shapes memorial alloy.Here the anchor clamps of using require very high to clamping force, because under higher temperature, alloy can produce restoring force, can't realize firm constraint with common pressing plate, so used the anchor clamps that a kind of upper and lower pressing plate can be engaged.
5, marmem is electrically connected
After test specimen is made, need will be separately independently marmem connect into a loop to satisfy the needs that energising drives.The method that connects is flexible and changeable, but must be foundation with the ability to bear of driving source.
As shown in Figure 1, adopt the mode of series connection, marmem is joined end to end in order, here it should be noted for input lead convenience and attractive in appearance, when adopting series model, the alloy number that the shop is gone into to contain again in the material should be even number, could guarantee that like this importing lines for two draws from same end.Among Fig. 11 is that composite-material laminates, 2 is that TiNi marmem, 3 is the alloy jointing.
The joint of marmem preferably can use welding to guarantee to connect effectively, if bad connection can make the resistance of junction increase suddenly, causes the local pyrexia amount excessive during energising, destroys the inner orderly phase structure of alloy.But be not easy in actual applications to realize, the one, can only the lower soldering of serviceability temperature could guarantee that the inside of alloy is not destroyed mutually, the 2nd, common cored solder and marmem are incompatible.So, adopted the minor spiral pressing plate to realize reliable the connection in the present invention, as shown in Figure 2.Wherein 11 is that marmem A, 12 is that marmem B, 13 is that metal platen, 14 is lock-screw.
In actual applications, it is relatively good that the memorial alloy connected mode adopts the mode of series connection.This is that its resistance sizes is 0.4756 Ω because every marmem band is of a size of 0.2 * 4 * 300, if adopt parallel way, the many more resistance of radical are more little, if the cross-over connection power supply is equivalent to power supply short circuit, increases huge burden to power supply; If be connected in series divider with marmem, the energy charge that the overwhelming majority will be arranged again makes that the efficient of drive source is very low, but just can avoid above situation with series system on divider.
Claims (8)
1, a kind of preparation method who initiatively is out of shape hybrid composite is characterized in that:
(1) selecting thickness for use is the laminar marmem of 0.2mm, with the marmem heating, removes the residual stress that produces in its production process;
(2) marmem is carried out certain limit, i.e. memory training in the 1%-2% scope;
(3) the marmem surface is handled, at first remove surface film oxide, and as required insulation processing is carried out on the marmem surface by polishing;
(4) material prepreg that cuts is spread in the mould, marmem is spread near in the material prepreg on the mould;
(5) close tight mould, the composite material solidification curve that provides according to the composite manufacturer merchant on hot press is cured;
(6) after the die sinking, marmem is electrically connected.
2, the preparation method who initiatively is out of shape hybrid composite according to claim 1 is characterized in that: the temperature of removing the residual stress heating described in the step (1) is higher than the austenite end temp of this marmem.
3, the preparation method who initiatively is out of shape hybrid composite according to claim 1 and 2 is characterized in that: the training step that carries out the memory training of certain limit described in the step (2) is: 4%-5% stretches marmem below the martensite end temp; Marmem after will being out of shape behind the constraint relief is heated to more than the austenite end temp, makes marmem be returned to original state fully; Treat that marmem is cooled to martensite start temperature and repeats the memory training that aforesaid operations is finished marmem for 20 times when following.
4, the preparation method who initiatively is out of shape hybrid composite according to claim 1 and 2, it is characterized in that: step is carried out insulation processing to marmem described in (3), be that marmem was immersed among the general impregnating resin of JF-98 B level 15 minutes fully, after finishing marmem hung on the plastic holding device 30 minutes, and made under the unnecessary resin flow.
5, the preparation method who initiatively is out of shape hybrid composite according to claim 3, it is characterized in that: step is carried out insulation processing to marmem described in (3), be that marmem was immersed among the general impregnating resin of JF-98 B level 15 minutes fully, after finishing marmem hung on the plastic holding device 30 minutes, and made under the unnecessary resin flow.
6, according to claim 1, the 2 or 5 described preparation methods that initiatively are out of shape hybrid composite, it is characterized in that: step is electrically connected marmem described in (6), be that all marmems are connected in series, and use metal platen to realize reliable the connection.
7, the preparation method who initiatively is out of shape hybrid composite according to claim 3, it is characterized in that: step is electrically connected marmem described in (6), be that all marmems are connected in series, and use metal platen to realize reliable the connection.
8, the preparation method who initiatively is out of shape hybrid composite according to claim 4, it is characterized in that: step is electrically connected marmem described in (6), be that all marmems are connected in series, and use metal platen to realize reliable the connection.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100102010A CN1326686C (en) | 2005-07-20 | 2005-07-20 | Process for preparing mixing material of actively deformed |
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| CNB2005100102010A CN1326686C (en) | 2005-07-20 | 2005-07-20 | Process for preparing mixing material of actively deformed |
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| CN1724248A CN1724248A (en) | 2006-01-25 |
| CN1326686C true CN1326686C (en) | 2007-07-18 |
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| CNB2005100102010A Expired - Fee Related CN1326686C (en) | 2005-07-20 | 2005-07-20 | Process for preparing mixing material of actively deformed |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2013030916A1 (en) * | 2011-08-29 | 2013-03-07 | トヨタ自動車株式会社 | Metal mold for hot pressing |
| DE102013200192A1 (en) * | 2012-01-12 | 2013-07-18 | GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) | System for selectively modifying texture of e.g. dashboard surface of vehicle, has active material element that carries out reversible change in fundamental property when coupled to foldable structure, to modify surface texture |
| CN107972754B (en) * | 2017-11-20 | 2020-11-20 | 江苏大学 | Shape memory alloy driven soft crawling robot |
| CN108372666B (en) * | 2018-02-26 | 2020-06-23 | 常州市新创智能科技有限公司 | Carbon fiber pultrusion profile embedded with metal plate and manufacturing process |
| CN109036626B (en) * | 2018-08-17 | 2019-12-24 | 北京航空航天大学 | Flexible stretchable conductive material and manufacturing device and method thereof |
| CN113698634B (en) * | 2021-07-13 | 2022-10-04 | 浙江大学 | Method for preparing self-adaptive molded polymer device and application |
| CN115197641A (en) * | 2022-08-08 | 2022-10-18 | 中国科学院光电技术研究所 | Electrically-controlled shape memory material and preparation method thereof |
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| JPS6036613B2 (en) * | 1978-11-07 | 1985-08-21 | 富士通株式会社 | adder |
| JPH1041249A (en) * | 1996-07-23 | 1998-02-13 | Sony Corp | Manufacturing method of semiconductor device |
| CN1247238A (en) * | 1998-09-09 | 2000-03-15 | 北京航空航天大学 | In-situ preparing of insulating film on surface of marmem |
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2005
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6036613B2 (en) * | 1978-11-07 | 1985-08-21 | 富士通株式会社 | adder |
| JPH1041249A (en) * | 1996-07-23 | 1998-02-13 | Sony Corp | Manufacturing method of semiconductor device |
| CN1247238A (en) * | 1998-09-09 | 2000-03-15 | 北京航空航天大学 | In-situ preparing of insulating film on surface of marmem |
Non-Patent Citations (2)
| Title |
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| NiTi形状记忆合金增强复合材料层合板的建模技术 苏众庆，麦汉超，北京航空航天大学学报，第26卷第3期 2000 * |
| 形状记忆合金混杂复合材料弯曲变形的设计 李顺利，张博明，材料科学与工艺，第12卷第6期 2004 * |
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