CN110588087B - Fiber metal hybrid composite material for filling MRE interlayer and preparation method thereof - Google Patents
Fiber metal hybrid composite material for filling MRE interlayer and preparation method thereof Download PDFInfo
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- CN110588087B CN110588087B CN201910909351.7A CN201910909351A CN110588087B CN 110588087 B CN110588087 B CN 110588087B CN 201910909351 A CN201910909351 A CN 201910909351A CN 110588087 B CN110588087 B CN 110588087B
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- B32B15/00—Layered products comprising a layer of metal
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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- B32B15/18—Layered products comprising a layer of metal comprising iron or steel
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
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- B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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Abstract
The invention relates to a fiber metal hybrid composite material filled with an MRE interlayer and a preparation method thereof. The composite material comprises a laminated plate wrapped with iron powder, a lubricant and a base body which are mixed to form a raw material, the laminated plate is used as a middle layer, a fiber cloth layer and an alloy plate layer are sequentially arranged in an up-down corresponding symmetry mode, and copper wires are tightly wound on the surface of the laminated plate. The preparation method comprises the steps of mixing the raw materials according to the proportion, laying alloy plates up and down, rolling to form a laminated plate, winding a copper wire, laying fiber cloth and the alloy plates up and down in sequence by taking the laminated plate as a center, and carrying out cementing and rolling on each layer to obtain the fiber metal hybrid composite material filled with the MRE interlayer. The method has simple process and mature process. The magneto-rheological elastomer material in the laminated plate improves the damping and energy absorption efficiency, and the rigidity and the damping characteristic of the laminated plate can be controlled within a certain range by controlling the current in the coil to change the magnetic field.
Description
The technical field is as follows:
the invention belongs to the technical field of fiber metal hybrid composite material design and preparation, and particularly relates to a fiber metal hybrid composite material for filling an MRE interlayer and a preparation method thereof.
Background art:
the fiber metal hybrid composite material is a novel non-homogeneous composite material, combines the advantages of good ductility and corrosion resistance of a metal material and the characteristics of light weight, high strength and the like of a fiber reinforced composite material, and is gradually and widely used in military and civil aircraft fuselage skins, vertical and horizontal tail wing leading edges, fairing plates, fairings, upper fuselage wall plates and upper wall plate stringers in recent years. With the structural configuration of the composite material becoming more and more complex and the working environment becoming more and more severe, the problem of how to reduce fatigue failure and the like caused by vibration, collision and impact of foreign objects and the like is receiving more and more attention from scientific workers. If the adjustable property of the damping performance of the magnetorheological material after the magnetic field is applied can be effectively utilized, and the dynamic characteristics such as the rigidity, the damping performance and the like of the fiber metal hybrid composite structure with the interlayer (or the core layer) filled with the magnetorheological material are actively controlled, the vibration resistance, the impact resistance, the fatigue durability and the working stability of the fiber metal hybrid composite structure can be greatly improved.
At present, the laminate structure with elastomer interlayer has been studied and designed intensively, but still has some problems. The prior art includes multi-functional composite materials with viscoelastic core layers that have unique advantages in impact resistance and noise reduction, however, due to limitations in the choice of viscoelastic core materials and structures, active control of their material properties is not possible. In addition, the foamed aluminum sandwich composite structure is easy to influence the performance of the sandwich layer after multiple times of heat treatment, and due to the limitation of the material of the foamed aluminum sandwich layer, the combination performance and the combination strength of the foamed aluminum sandwich composite structure and the panel are insufficient, so that the problems of uneven density distribution and the like are easily caused. The sandwich plate is also provided with a foam honeycomb sandwich plate with a laminated structure, and is mainly applied to high-speed motor train units, urban rails and subway vehicles. However, the foam honeycomb core structure is easy to break and collapse during preparation, the preparation process is complicated, and the filling consistency is difficult to ensure. The above technology mainly relates to a preparation method of a viscoelastic sandwich material, and the material characteristics (parameters such as rigidity and damping) of the viscoelastic sandwich material cannot be actively controlled.
The invention content is as follows:
the invention aims to overcome the defects of the prior art and provides a fiber metal hybrid composite material for filling an MRE interlayer and a preparation method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
the fiber metal hybrid composite material filled with the MRE interlayer comprises a laminated plate, wherein a fiber cloth layer and an alloy plate layer are correspondingly and sequentially arranged up and down symmetrically by taking the laminated plate as an intermediate layer; the copper wire is tightly wound on the surface of the laminated plate, the laminated plate is formed by wrapping raw materials by an alloy plate, and the raw materials comprise, by mass, 60-80% of iron powder, 10-20% of a lubricant and 10-20% of a matrix.
The iron powder is carbonyl iron powder.
The lubricant is silicone oil, and the type of the silicone oil is PMX 200.
The substrate is silicon rubber, and the silicon rubber is 704 silicon rubber.
The thickness of the raw material wrapped by the laminated plate is 0.8-1.5 mm, the total number of the fiber cloth layers is 12-16, the alloy plate layer is an aluminum alloy plate or a titanium alloy plate, the thickness of a single layer is 0.3mm, the alloy plate in the laminated plate is an aluminum alloy plate or a titanium alloy plate, and the thickness of the single layer is 0.3 mm.
The preparation method of the fiber metal hybrid composite material for filling the MRE interlayer comprises the following steps:
step 1, preparing a premixed material:
respectively weighing 60-80% of iron powder, 10-20% of lubricant and 10-20% of matrix according to the mass percentage, mixing the iron powder, the lubricant and the matrix, and uniformly stirring to obtain a premix material with fluidity;
(1) taking two alloy plates, placing one of the two alloy plates in a rectangular die, uniformly paving the premixed material on the surface of the alloy plate, wherein the paving thickness is 1-2 mm, placing the other alloy plate on the upper layer in an aligned manner, and rolling until the thickness of the premixed material is 0.8-1.5 mm;
(2) standing the rolled premixed material for 48-72 hours to finish curing and forming to form a laminated plate;
taking out the laminated plate, and winding the copper wires along the width direction of the laminated plate to ensure that the copper wires are closely arranged without gaps, wherein the number of the winding layers is one;
(1) another two alloy plates are taken, one of the alloy plates is arranged on a glass mold precoated with a release agent, unidirectional carbon fiber cloth is laid on the alloy plate, the number of laid layers is 6-8, and a cementing agent is coated between the layers for cementing;
(2) and (3) aligning the laminated plate wound by the copper wire on the carbon fiber cloth in the glass mold, continuously laying 6-8 layers of the unidirectional carbon fiber cloth, cementing the layers by using a cementing agent, wherein the principle and the process are the same as the step 4(1), finally, arranging another laminated plate above the laminated plate, repeatedly rolling by using a compression roller until bubbles are removed, compressing another glass mold precoated with the release agent from top to bottom, and completing curing molding in a compressed state to obtain the fiber metal hybrid composite material filled with the MRE interlayer.
In the step 1, the viscosity of the premixed material is 60,000-120,000 cps, and the viscosity is measured at room temperature.
In the step 1, the iron powder is carbonyl iron powder.
In the step 1, the lubricant is silicone oil, and the type of the silicone oil is PMX 200.
In the step 1, the substrate is silicon rubber, and the silicon rubber is 704 silicon rubber.
In the step 2(1), the two alloy plates are placed in a rectangular die after surface pretreatment such as oil stain removal, rust removal and the like.
In the step 2(2), the curing is carried out under a magnetic field, and the curing process specifically comprises the following steps: two permanent magnets with different magnetism are symmetrically arranged on two sides of the width direction of the die to form a magnetic field, the magnetic field intensity is 0.5-1T, the die waits for 48-72 hours at room temperature, the premixed material is cured in the magnetic field environment, and the premixed material is completely formed to form a laminated plate;
in the step 2(2), the size of the permanent magnet is mainly used for forming a magnetic field to completely cover the rectangular die.
In the step 2(2), the alloy plates are arranged in alignment, the magnetorheological elastomer core layer and the alloy plates on the upper side and the lower side of the magnetorheological elastomer core layer are bonded by the self viscosity of the premixed material, and sufficient curing time is ensured.
In the step 3, the winding direction of the copper wire is parallel to the placing direction of the permanent magnet.
In the step 3, the copper wire is an enameled copper wire, the enameled copper wire is a type QSR high-strength enameled copper wire, the diameter is 0.2mm, the purity is 99.8%, the wire is tightly wound without gaps and overlapping, and sufficient length is reserved at two ends for subsequent use.
In the step 4(1), the two alloy plates are placed in a glass mold after surface pretreatment such as oil stain removal, rust removal and the like.
In the step 4(2), the compaction pressure is 200N, the compaction state is kept for 48h, the curing and forming are completed, and the fiber metal hybrid composite material filling the MRE interlayer is prepared.
In the step 4, the type of the unidirectional fiber cloth is T300, T600 or T700, the elastic modulus is 119MPa, 136MPa or 210MPa, and the thickness is 0.15-0.25 mm.
And 4, coating adhesive between the alloy plate and the unidirectional fiber cloth and between the unidirectional fiber cloth and the copper wire wound laminated plate to realize adhesive connection.
In the step 4, the cementing agent is epoxy resin, and the type of the epoxy resin is EP-HTL. The epoxy resin adhesive has high connection strength, short curing time and easy processing, and the curing shrinkage of the epoxy resin is generally 1-2%. Is one of the varieties with the minimum curing shrinkage rate in thermosetting resin. The coefficient of linear expansion is also very small, typically 6X 10-5/℃。
In the step 4, the thickness of the obtained multilayer fiber metal hybrid composite board filled with the magnetorheological elastomer interlayer is 4.2-7.1 mm.
In the step 1 and the step 4, the alloy plate is an aluminum alloy plate or a titanium alloy plate, the aluminum alloy plate is 6061 aviation aluminum, and the thickness is 0.3 mm. The titanium alloy plate is TA2 in model number and 0.3mm in thickness.
In the step 4, when the glass mold is compacted, each layer in the glass mold does not have displacement.
In the step 4, the fiber metal hybrid composite material filled in the MRE interlayer is electrified, and the current density is 1-3A/mm2The power-on time is 30s, and the test shows that the damping ratio of the composite material is 2-8%, and the rigidity is 1-3 multiplied by 106(N/m)。
The invention relates to a magnetorheological elastomer material which is a viscoelastic material with adjustable damping performance after a magnetic field is applied. The fiber metal hybrid composite material has high viscosity before curing, is designed in the core layer, is bonded with the fiber metal hybrid composite materials of the upper and lower panels through the viscosity of the fiber metal hybrid composite material, mainly bears shearing force, and improves the shearing resistance of the structure. The fiber metal hybrid composite material of the outer layer has the characteristics of high specific strength/rigidity, high toughness, capability of generating plastic deformation and dissipating energy, low cost and convenience for manufacturing and molding. In addition, under the condition of applying a magnetic field externally or internally, the damping performance of the material is greatly enhanced, and the damping of the material can be controlled steplessly within a certain range.
The invention has the beneficial effects that:
the invention provides a preparation method of a fiber metal hybrid composite material filled with a magnetorheological elastomer material, taking a plate structure as an example, the magnetorheological material is introduced into the fiber metal hybrid composite material, and a composite material plate filled with the magnetorheological core layer is obtained by a core layer and an outer layer through self viscosity and cementation. The magnetorheological elastomer core layer improves the damping and energy absorption efficiency, and can change the magnetic field by controlling the current in the coil, thereby controlling the rigidity and the damping characteristic of the magnetorheological elastomer in a certain range. The preparation method has simple process and mature process, and can be used for batch production.
Description of the drawings:
fig. 1 is a schematic structural view of a fiber metal hybrid composite filled with MRE interlayers prepared in example 1, wherein 1-alloy ply, 2-fiber cloth ply, 3-copper wire, 4-laminate.
The specific implementation mode is as follows:
the present invention will be described in further detail with reference to examples.
In the following examples:
the viscosity of the premixed material is measured at room temperature and 25 ℃;
the type of the silicone oil is PMX 200;
the silicon rubber is 704 silicon rubber;
the enameled copper wire is a QSR high-strength enameled copper wire with the diameter of 0.2mm and the purity of 99.8 percent;
the epoxy resin is EP-HTL in type, the curing shrinkage is 1-2 percent, and the linear expansion coefficient is 6 multiplied by 10-5/℃；
The aluminum alloy plate is 6061 aviation aluminum, and the thickness is 0.3 mm; the model of the titanium alloy plate is TA2, and the thickness is 0.3 mm;
in the process of laying the unidirectional fiber cloth, the laying mode of each layer is orthogonal laying.
The fiber metal hybrid composite material filled with the MRE interlayer comprises a laminated plate, wherein a fiber cloth layer and an alloy plate layer are correspondingly and sequentially arranged up and down symmetrically by taking the laminated plate as an intermediate layer; wherein the surface of the laminated plate is tightly wound with copper wires.
The laminated plate is formed by wrapping raw materials by an alloy plate, wherein the raw materials comprise, by mass, 60-80% of iron powder, 10-20% of a lubricant and 10-20% of a base.
The iron powder is carbonyl iron powder.
The lubricant is silicone oil, and the type of the silicone oil is PMX 200.
The substrate is silicon rubber, and the silicon rubber is 704 silicon rubber.
The thickness of the raw material wrapped by the laminated plate is 0.8-1.5 mm, the total number of the fiber cloth layers is 12-16, the alloy plate layer is an aluminum alloy plate or a titanium alloy plate, the thickness of a single layer is 0.3mm, the alloy plate in the laminated plate is an aluminum alloy plate or a titanium alloy plate, and the thickness of the single layer is 0.3 mm.
The preparation method of the fiber metal hybrid composite material for filling the MRE interlayer comprises the following steps:
step 1, preparing a premixed material:
respectively weighing 60-80% of iron powder, 10-20% of lubricant and 10-20% of matrix according to the mass percentage, mixing the iron powder, the lubricant and the matrix, and uniformly stirring to obtain a premix material with fluidity;
(1) taking two alloy plates, placing one of the two alloy plates in a rectangular die, uniformly paving the premixed material on the surface of the alloy plate, wherein the paving thickness is 1-2 mm, placing the other alloy plate on the upper layer in an aligned manner, and rolling until the thickness of the premixed material is 0.8-1.5 mm;
(2) standing the rolled premixed material for 48-72 hours to finish curing and forming to form a laminated plate;
taking out the laminated plate, and winding the copper wires along the width direction of the laminated plate to ensure that the copper wires are closely arranged without gaps, wherein the number of the winding layers is one;
(1) another two alloy plates are taken, one of the alloy plates is arranged on a glass mold precoated with a release agent, unidirectional carbon fiber cloth is laid on the alloy plate, the number of laid layers is 6-8, and a cementing agent is coated between the layers for cementing;
(2) and (3) aligning the laminated plate wound by the copper wire on the carbon fiber cloth in the glass mold, continuously laying 6-8 layers of the unidirectional carbon fiber cloth, cementing the layers by using a cementing agent, wherein the principle and the process are the same as the step 4(1), finally, arranging another laminated plate above the laminated plate, repeatedly rolling by using a compression roller until bubbles are removed, compressing another glass mold precoated with the release agent from top to bottom, and completing curing molding in a compressed state to obtain the fiber metal hybrid composite material filled with the MRE interlayer.
In the step 1, the viscosity of the premixed material is 60,000-120,000 cps, and the viscosity is measured at room temperature.
In the step 1, the iron powder is carbonyl iron powder.
In the step 1, the lubricant is silicone oil, and the type of the silicone oil is PMX 200.
In the step 1, the substrate is silicon rubber, and the silicon rubber is 704 silicon rubber.
In the step 2(1), the two alloy plates are placed in a rectangular die after surface pretreatment such as oil stain removal, rust removal and the like.
In the step 2(2), the curing is carried out under a magnetic field, and the curing process specifically comprises the following steps: two permanent magnets with different magnetism are symmetrically arranged on two sides of the width direction of the die to form a magnetic field, the magnetic field intensity is 0.5-1T, the die waits for 48-72 hours at room temperature, the premixed material is cured in the magnetic field environment, and the premixed material is completely formed to form a laminated plate;
in the step 2(2), the size of the permanent magnet is mainly used for forming a magnetic field to completely cover the rectangular die.
In the step 2(2), the alloy plates are arranged in alignment, the magnetorheological elastomer core layer and the alloy plates on the upper side and the lower side of the magnetorheological elastomer core layer are bonded by the self viscosity of the premixed material, and sufficient curing time is ensured.
In the step 3, the winding direction of the copper wire is parallel to the placing direction of the permanent magnet.
In the step 3, the copper wire is an enameled copper wire, the enameled copper wire is a type QSR high-strength enameled copper wire, the diameter is 0.2mm, the purity is 99.8%, the wire is tightly wound without gaps and overlapping, and sufficient length is reserved at two ends for subsequent use.
In the step 4(1), the two alloy plates are placed in a glass mold after surface pretreatment such as oil stain removal, rust removal and the like.
In the step 4(2), the compaction pressure is 200N, the compaction state is kept for 48h, the curing and forming are completed, and the fiber metal hybrid composite material filling the MRE interlayer is prepared.
In the step 4, the type of the unidirectional fiber cloth is T300, T600 or T700, the elastic modulus is 119MPa, 136MPa or 210MPa, and the thickness is 0.15-0.25 mm.
And 4, coating adhesive between the alloy plate and the unidirectional fiber cloth and between the unidirectional fiber cloth and the copper wire wound laminated plate to realize adhesive connection.
In the step 4, the cementing agent is epoxy resin, and the type of the epoxy resin is EP-HTL. The epoxy resin adhesive has high connection strength, short curing time and easy processing, and the curing shrinkage of the epoxy resin is generally 1-2%. Is one of the varieties with the minimum curing shrinkage rate in thermosetting resin. The coefficient of linear expansion is also very small, typically 6X 10-5/℃。
In the step 4, the thickness of the obtained multilayer fiber metal hybrid composite board filled with the magnetorheological elastomer interlayer is 4.2-7.1 mm.
In the step 1 and the step 4, the alloy plate is an aluminum alloy plate or a titanium alloy plate, the aluminum alloy plate is 6061 aviation aluminum, and the thickness is 0.3 mm. The titanium alloy plate is TA2 in model number and 0.3mm in thickness.
In the step 4, when the glass mold is compacted, each layer in the glass mold does not have displacement.
In the step 4, the fiber metal hybrid composite material filled in the MRE interlayer is electrified, and the current density is 1-3A/mm2The power-on time is 30s, and the test shows that the damping ratio of the composite board is 2-8%, and the rigidity is 1-3 multiplied by 106(N/m)。
Example 1
The fiber metal hybrid composite material filled with the MRE interlayer comprises a laminated plate, the structural schematic diagram of the laminated plate is shown in figure 1, a laminated plate 4 is taken as an intermediate layer, and a fiber cloth layer 2 and an alloy plate layer 1 are correspondingly and symmetrically arranged up and down in sequence; wherein, the surface of the laminated plate 4 is tightly wound with a copper wire 3;
the laminated plate 4 is formed by wrapping raw materials by an alloy plate, wherein the raw materials comprise, by mass, 60% of carbonyl iron powder, 20% of silicone oil and 20% of silicone rubber;
the thickness of the raw material wrapped by the laminated plate 4 is 0.8mm, the total number of the fiber cloth layers is 16, the alloy plate layer is an aluminum alloy plate, the single-layer thickness is 0.3mm, and the alloy plate in the laminated plate 4 is an aluminum alloy plate and the single-layer thickness is 0.3 mm.
The preparation method of the fiber metal hybrid composite material for filling the MRE interlayer comprises the following steps:
step 1, preparing a premixed material:
respectively weighing 60% of carbonyl iron powder, 20% of silicone oil and 20% of silicone rubber according to the mass percentage, mixing the carbonyl iron powder, the silicone oil and the silicone rubber in a beaker, and uniformly stirring the mixture by using a glass rod to obtain a premixed material with fluidity, wherein the viscosity is 120,000 cps;
(1) taking two aluminum alloy plates, performing surface pretreatment for removing oil stains and rust stains, placing one of the two aluminum alloy plates in a rectangular mold, uniformly paving the premixed material on the surface of the alloy plate, wherein the paving thickness is 1mm, placing the other aluminum alloy plate on the upper layer of the premixed material in alignment, and repeatedly rolling the premixed material by using a compression roller until the thickness of the premixed material is 0.8 mm;
(2) two permanent magnets with different magnetism are symmetrically arranged on two sides of the width direction of the die to form a magnetic field, the magnetic field intensity is 0.5T, and the die waits for 72 hours at room temperature, so that the premixed material is cured in the magnetic field environment and is completely molded to form a laminated plate; the size of the permanent magnet is mainly that a magnetic field is formed to completely cover the rectangular die, the premixed material and the alloy plates on the upper side and the lower side of the premixed material are adhered by the self viscosity of the premixed material, and sufficient curing time is ensured;
and taking out the laminated plate, winding the enameled copper wire along the width direction of the laminated plate, ensuring that the copper wires are closely arranged without gaps and overlapping, reserving sufficient length at two ends for subsequent use, and enabling the winding direction of the copper wire to be parallel to the placement direction of the permanent magnet.
(1) taking another two aluminum alloy plates, after surface pretreatment of oil stain removal and rust removal, arranging one of the two aluminum alloy plates on a glass mold precoated with a release agent, laying unidirectional carbon fiber cloth on the alloy plate, wherein the type of the unidirectional carbon fiber cloth is T300, the elastic modulus is 119MPa, the thickness is 0.15mm, the number of laying layers is 8, coating an adhesive between each layer for adhesion, and coating epoxy resin between the alloy plate and the unidirectional fiber cloth to realize adhesive connection;
(2) the method comprises the following steps of (1) aligning a laminated plate wound by a copper wire on carbon fiber cloth in a glass mold, continuously laying 8 layers of unidirectional carbon fiber cloth, gluing the layers by epoxy resin, brushing a gluing agent between the unidirectional fiber cloth and the laminated plate wound by the copper wire to realize gluing connection, and finally arranging another alloy plate above the laminated plate, brushing the epoxy resin between the alloy plate and the unidirectional fiber cloth to realize gluing connection, repeatedly rolling by a compression roller until bubbles are removed, pressing another glass mold precoated with a release agent from top to bottom, wherein the pressing pressure is 200N, the pressing state is kept for 48h, the curing molding is completed, and the non-displacement of each layer inside the glass mold is ensured when the glass mold is pressed, so that the fiber metal hybrid composite material filled with the MRE interlayer is prepared, and the thickness is 4.8 mm.
Electrifying the fiber metal hybrid composite material filled with the MRE interlayer, and electrifying the fiber metal hybrid composite material with the current density of 1A/mm2The power-on time is 30s, the test shows that the damping ratio of the composite board is 2 percent, and the rigidity is 3 multiplied by 106(N/m)。
The structure of the fiber metal hybrid composite material filled with MRE interlayers in the following examples 2 to 4 is the same as that in example 1, except that the thickness of each layer and the material of the alloy plate are different, as described in the methods of the examples.
Example 2
The preparation method of the fiber metal hybrid composite material for filling the MRE interlayer comprises the following steps:
step 1, preparing a premixed material:
respectively weighing 64% of carbonyl iron powder, 18% of silicone oil and 18% of silicone rubber according to the mass percentage, mixing the carbonyl iron powder, the silicone oil and the silicone rubber in a beaker, and uniformly stirring the mixture by using a glass rod to obtain a premixed material with fluidity, wherein the viscosity is 110,000 cps;
(1) taking two aluminum alloy plates, performing surface pretreatment for removing oil stains and rust stains, placing one of the two aluminum alloy plates in a rectangular mold, uniformly paving the premixed material on the surface of the alloy plate, wherein the paving thickness is 1.2mm, placing the other aluminum alloy plate on the upper layer of the premixed material in an aligned mode, and repeatedly rolling the premixed material by using a compression roller until the thickness of the premixed material is 1 mm;
(2) two permanent magnets with different magnetism are symmetrically arranged on two sides of the width direction of the die to form a magnetic field, the magnetic field intensity is 0.5T, and the die waits for 72 hours at room temperature, so that the premixed material is cured in the magnetic field environment and is completely molded to form a laminated plate; the size of the permanent magnet is mainly that a magnetic field is formed to completely cover the rectangular die, the premixed material and the alloy plates on the upper side and the lower side of the premixed material are adhered by the self viscosity of the premixed material, and sufficient curing time is ensured;
and taking out the laminated plate, winding the enameled copper wire along the width direction of the laminated plate, ensuring that the copper wires are closely arranged without gaps and overlapping, reserving sufficient length at two ends for subsequent use, and enabling the winding direction of the copper wire to be parallel to the placement direction of the permanent magnet.
(1) taking another two aluminum alloy plates, after surface pretreatment of oil stain removal and rust removal, arranging one of the two aluminum alloy plates on a glass mold precoated with a release agent, laying unidirectional carbon fiber cloth on the alloy plate, wherein the type of the unidirectional carbon fiber cloth is T300, the elastic modulus is 119MPa, the thickness is 0.15mm, the number of laying layers is 8, coating an adhesive between each layer for adhesion, and coating epoxy resin between the alloy plate and the unidirectional fiber cloth to realize adhesive connection;
(2) the method comprises the following steps of (1) aligning a laminated plate wound by a copper wire on carbon fiber cloth in a glass mold, continuously laying 8 layers of unidirectional carbon fiber cloth, gluing the layers by epoxy resin, brushing a gluing agent between the unidirectional fiber cloth and the laminated plate wound by the copper wire to realize gluing connection, and finally arranging another alloy plate above the laminated plate, brushing the epoxy resin between the alloy plate and the unidirectional fiber cloth to realize gluing connection, repeatedly rolling by a compression roller until bubbles are removed, pressing another glass mold precoated with a release agent from top to bottom, wherein the pressing pressure is 200N, the pressing state is kept for 48h, the curing molding is completed, and the fact that all layers in the glass mold are not displaced when the glass mold is pressed is ensured, so that the fiber metal hybrid composite material filled with the MRE interlayer is prepared, and the thickness is 5 mm.
Electrifying the fiber metal hybrid composite material filled with the MRE interlayer, and electrifying the fiber metal hybrid composite material with the current density of 1.5A/mm2The power-on time is 30s, the test shows that the damping ratio of the composite board is 4 percent, and the rigidity is 2.5 multiplied by 106(N/m)。
Example 3
The preparation method of the fiber metal hybrid composite material for filling the MRE interlayer comprises the following steps:
step 1, preparing a premixed material:
weighing 70% of carbonyl iron powder, 15% of silicone oil and 15% of silicone rubber according to the mass percentage, mixing the carbonyl iron powder, the silicone oil and the silicone rubber in a beaker, and uniformly stirring the mixture by using a glass rod to obtain a flowable premixed material with the viscosity of 80,000 cps;
(1) taking two titanium alloy plates, performing surface pretreatment for removing oil stains and rust stains, placing one of the two titanium alloy plates in a rectangular mold, uniformly paving the premixed material on the surface of the alloy plate, wherein the paving thickness is 1.5mm, placing the other alloy plate on the upper layer of the premixed material in an aligned mode, and repeatedly rolling the premixed material by using a compression roller until the thickness of the premixed material is 1.2 mm;
(2) two permanent magnets with different magnetism are symmetrically arranged on two sides of the width direction of the die to form a magnetic field, the magnetic field intensity is 1T, the die waits for 48 hours at room temperature, the premixed material is cured in the magnetic field environment and is completely molded to form a laminated plate; the size of the permanent magnet is mainly that a magnetic field is formed to completely cover the rectangular die, the premixed material and the alloy plates on the upper side and the lower side of the premixed material are adhered by the self viscosity of the premixed material, and sufficient curing time is ensured;
and taking out the laminated plate, winding the enameled copper wire along the width direction of the laminated plate, ensuring that the copper wires are closely arranged without gaps and overlapping, reserving sufficient length at two ends for subsequent use, and enabling the winding direction of the copper wire to be parallel to the placement direction of the permanent magnet.
(1) taking another two titanium alloy plates, after surface pretreatment of oil stain removal and rust removal, arranging one of the two alloy plates on a glass mold precoated with a release agent, laying unidirectional carbon fiber cloth on the alloy plate, wherein the type of the unidirectional carbon fiber cloth is T600, the elastic modulus is 136MPa, the thickness is 0.2mm, the number of laying layers is 6, coating a cementing agent between the layers for cementing, and coating epoxy resin between the alloy plates and the unidirectional fiber cloth to realize cementing connection;
(2) the method comprises the following steps of (1) aligning a laminated plate wound by a copper wire on carbon fiber cloth in a glass mold, continuously laying 6 layers of unidirectional carbon fiber cloth, gluing the layers by epoxy resin, brushing a gluing agent between the unidirectional fiber cloth and the laminated plate wound by the copper wire to realize gluing connection, and finally arranging another alloy plate above the laminated plate, brushing the epoxy resin between the alloy plate and the unidirectional fiber cloth to realize gluing connection, repeatedly rolling by a compression roller until bubbles are removed, pressing another glass mold precoated with a release agent from top to bottom, wherein the pressing pressure is 200N, the pressing state is kept for 48h, the curing molding is completed, and the non-displacement of each layer inside the glass mold is ensured when the glass mold is pressed, so that the fiber metal hybrid composite material filled with the MRE interlayer is prepared, and the thickness is 5.2 mm.
Electrifying the fiber metal hybrid composite material filled with the MRE interlayer, and electrifying the fiber metal hybrid composite material with the current density of 2A/mm2The power-on time is 30s, the test shows that the damping ratio of the composite board is 6 percent, and the rigidity is 2 multiplied by 106(N/m)。
Example 4
The preparation method of the fiber metal hybrid composite material for filling the MRE interlayer comprises the following steps:
step 1, preparing a premixed material:
respectively weighing 80% of carbonyl iron powder, 10% of silicone oil and 10% of silicone rubber according to the mass percentage, mixing the carbonyl iron powder, the silicone oil and the silicone rubber in a beaker, and uniformly stirring the mixture by using a glass rod to obtain a premixed material with fluidity, wherein the viscosity is 60,000 cps;
(1) taking two titanium alloy plates, performing surface pretreatment for removing oil stains and rust stains, placing one of the two titanium alloy plates in a rectangular mold, uniformly paving the premixed material on the surface of the alloy plate, wherein the paving thickness is 2mm, placing the other alloy plate on the upper layer of the premixed material in alignment, and repeatedly rolling the premixed material by using a compression roller until the thickness of the premixed material is 1.5 mm;
(2) two permanent magnets with different magnetism are symmetrically arranged on two sides of the width direction of the die to form a magnetic field, the magnetic field intensity is 1T, the die waits for 48 hours at room temperature, the premixed material is cured in the magnetic field environment and is completely molded to form a laminated plate; the size of the permanent magnet is mainly that a magnetic field is formed to completely cover the rectangular die, the premixed material and the alloy plates on the upper side and the lower side of the premixed material are adhered by the self viscosity of the premixed material, and sufficient curing time is ensured;
and taking out the laminated plate, winding the enameled copper wire along the width direction of the laminated plate, ensuring that the copper wires are closely arranged without gaps and overlapping, reserving sufficient length at two ends for subsequent use, and enabling the winding direction of the copper wire to be parallel to the placement direction of the permanent magnet.
(1) taking another two titanium alloy plates, after surface pretreatment of oil stain removal and rust removal, arranging one of the two alloy plates on a glass mold precoated with a release agent, laying unidirectional carbon fiber cloth on the alloy plate, wherein the type of the unidirectional carbon fiber cloth is T700, the elastic modulus is 210MPa, the thickness is 0.25mm, the number of laying layers is 6, coating a cementing agent between the layers for cementing, and coating epoxy resin between the alloy plates and the unidirectional fiber cloth to realize cementing connection;
(2) the method comprises the following steps of (1) aligning a laminated plate wound by a copper wire on carbon fiber cloth in a glass mold, continuously laying 6 layers of unidirectional carbon fiber cloth, gluing the layers by epoxy resin, brushing a gluing agent between the unidirectional fiber cloth and the laminated plate wound by the copper wire to realize gluing connection, and finally arranging another alloy plate above the laminated plate, brushing the epoxy resin between the alloy plate and the unidirectional fiber cloth to realize gluing connection, repeatedly rolling by a compression roller until bubbles are removed, pressing another glass mold precoated with a release agent from top to bottom, wherein the pressing pressure is 200N, the pressing state is kept for 48h, the curing molding is completed, and the non-displacement of each layer inside the glass mold is ensured when the glass mold is pressed, so that the fiber metal hybrid composite material filled with the MRE interlayer is prepared, and the thickness is 6.1 mm.
Electrifying the fiber metal hybrid composite material filled with the MRE interlayer, and electrifying the fiber metal hybrid composite material with the current density of 2.5A/mm2The power-on time is 30s, the test shows that the damping ratio of the composite board is 8 percent, and the rigidity is 1 multiplied by 106(N/m)。
Claims (8)
1. The preparation method of the fiber metal hybrid composite material filled with the MRE interlayer is characterized in that the fiber metal hybrid composite material filled with the MRE interlayer comprises a laminated plate, wherein a unidirectional carbon fiber cloth layer and an alloy plate layer are sequentially and vertically and symmetrically arranged by taking the laminated plate as an intermediate layer; the copper wire is tightly wound on the surface of the laminated plate, the laminated plate is formed by wrapping raw materials by an alloy plate, and the raw materials comprise, by mass, 60-80% of iron powder, 10-20% of a lubricant and 10-20% of a matrix; electrifying the fiber metal hybrid composite material filled with the MRE interlayer, wherein the current density is 1-3A/mm2The electrifying time is 30s, and the test shows that the rigidity of the composite material is 1-3 multiplied by 106N/m；
The method comprises the following steps:
step 1, preparing a premixed material:
respectively weighing 60-80% of iron powder, 10-20% of lubricant and 10-20% of matrix according to the mass percentage, mixing the iron powder, the lubricant and the matrix, and uniformly stirring to obtain a premix material with fluidity;
step 2, preparing a laminated plate:
(1) taking two alloy plates, placing one of the two alloy plates in a rectangular die, uniformly paving the premixed material on the surface of the alloy plate, wherein the paving thickness is 1-2 mm, placing the other alloy plate on the upper layer in an aligned manner, and rolling until the thickness of the premixed material is 0.8-1.5 mm;
(2) the pre-mixed material after rolling is kept stand for 48-72 hours, the solidification forming is completed, a laminated plate is formed, the solidification is carried out under a magnetic field, and the concrete solidification process is as follows: two permanent magnets with different magnetism are symmetrically arranged on two sides of the width direction of the die to form a magnetic field, the magnetic field intensity is 0.5-1T, the die waits for 48-72 hours at room temperature, the premixed material is cured in the magnetic field environment, and the premixed material is completely formed to form a laminated plate;
step 3, winding a copper wire:
taking out the laminated plate, and winding the copper wires along the width direction of the laminated plate to ensure that the copper wires are closely arranged without gaps, wherein the number of the winding layers is one;
step 4, preparing the fiber metal hybrid composite material for filling the MRE interlayer:
(1) another two alloy plates are taken, one of the alloy plates is arranged on a glass mold precoated with a release agent, unidirectional carbon fiber cloth is laid on the alloy plate, the number of laid layers is 6-8, and a cementing agent is coated between the layers for cementing;
(2) and (3) aligning the laminated plate wound by the copper wire on the unidirectional carbon fiber cloth in the glass mold, continuously laying 6-8 layers of the unidirectional carbon fiber cloth, cementing the layers by using a cementing agent, finally arranging another alloy plate above the laminated plate, repeatedly rolling by using a pressing roller until bubbles are removed, compacting another glass mold precoated with a release agent from top to bottom, and finishing curing molding in a compaction state to prepare the fiber metal hybrid composite material for filling the MRE interlayer.
2. The method of claim 1, wherein the iron powder is carbonyl iron powder, the lubricant is silicone oil, and the matrix is silicone rubber.
3. The method for preparing the fiber metal hybrid composite material filled with the MRE interlayer according to claim 1, wherein the thickness of the raw material wrapped by the laminated plate is 0.8-1.5 mm, the total number of the unidirectional carbon fiber cloth layers is 12-16, the alloy plate layer is an aluminum alloy plate or a titanium alloy plate, the thickness of the single layer is 0.3mm, the alloy plate in the laminated plate is an aluminum alloy plate or a titanium alloy plate, and the thickness of the single layer is 0.3 mm.
4. The method for preparing a fiber metal hybrid composite for filling an MRE interlayer according to claim 1, wherein in the step 1, the viscosity of the pre-mixed material is 60,000-120,000 cps.
5. The method of claim 1, wherein in step 2 (2): the alloy plates in the laminated plate are arranged in alignment, and the premixed material and the alloy plates on the upper side and the lower side of the premixed material are adhered by the self-adhesion of the premixed material.
6. The method according to claim 1, wherein in step 3, the copper wire winding direction is parallel to the permanent magnet placement direction, the copper wire is an enameled copper wire, and the copper wire is tightly wound without gaps and overlaps.
7. The method for preparing the fiber metal hybrid composite material filled with the MRE interlayer as claimed in claim 1, wherein in the step 4, the alloy plate and the unidirectional carbon fiber cloth, and the unidirectional carbon fiber cloth and the copper wire wound laminated plate are connected by coating adhesive, and the adhesive is epoxy resin.
8. The method of claim 1, wherein in step 4, the glass mold is pressed without displacement of the inner layers.
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