CN116118296A - Fiber composite bionic composite structural member and preparation method thereof - Google Patents

Fiber composite bionic composite structural member and preparation method thereof Download PDF

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Publication number
CN116118296A
CN116118296A CN202211500837.3A CN202211500837A CN116118296A CN 116118296 A CN116118296 A CN 116118296A CN 202211500837 A CN202211500837 A CN 202211500837A CN 116118296 A CN116118296 A CN 116118296A
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fiber composite
energy absorption
layer
winding
composite
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刘家安
于泽润
宋达
窦志昂
董智强
张俊秋
韩志武
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Weihai Institute Of Bionics Jilin University
Jilin University
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Weihai Institute Of Bionics Jilin University
Jilin University
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D33/00—Arrangements in aircraft of power plant parts or auxiliaries not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/043—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/14—Layered products comprising a layer of metal next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/18—Layered products comprising a layer of metal comprising iron or steel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/02—Composition of the impregnated, bonded or embedded layer
    • B32B2260/021—Fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/04—Impregnation, embedding, or binder material
    • B32B2260/046—Synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/544—Torsion strength; Torsion stiffness
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

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Abstract

The invention relates to the technical field of composite materials, in particular to a fiber composite bionic composite structural member. The fiber composite material bionic composite structural member has anti-twisting and buffering energy absorption properties and consists of an inner layer, an intermediate layer and an outer layer; the inner layer is a buckling-induction type metal with a negative poisson ratio and multiple holes; the middle layer is a hollow cylindrical metal shell contacted with the porous metal; the outer layer is a fiber composite layer wound on the hollow cylindrical metal shell. The core part of the fiber composite material bionic composite structure component with torsion resistance, buffering and energy absorption is of a negative poisson ratio porous metal structure, the shape of a through hole in the sea urchin-like thorns is imitated, the middle layer is of a metal shell, and the shape of a growth ring of the sea urchin-like thorns is imitated; the negative poisson's ratio structure shrinks laterally when compressed and expands laterally when stretched, and the structure has better kink resistance than a general porous structure.

Description

Fiber composite bionic composite structural member and preparation method thereof
Technical Field
The invention relates to the technical field of composite materials, in particular to a fiber composite bionic composite structural member with torsion resistance, folding resistance and energy absorption buffering.
Background
With the continuous development of the aerospace field, the requirements on the torsion-resistant, buffering and energy-absorbing components of the safety system are higher and higher, and the structure with good energy absorption and energy absorption can be widely applied to the aerospace field, in particular to the manufacturing aspect of an aircraft engine. At present, the research and report on energy absorbing components at home and abroad are more, and the common composite structure mainly comprises an inner hollow tube and an outer hollow tube in terms of strength, energy absorption performance and the like, such as a combination of an outer metal tube and an inner hollow tube, and a combination of an outer fiber composite tube and an inner hollow tube. Along with the continuous development of science and technology, scientific researchers are continuously inspired from the nature, and design a plurality of bionic materials and members with energy absorption function, and the research on the multilayer cylindrical bionic energy absorption members is related.
The invention provides an energy absorbing tube with a bamboo-like structure, which consists of a cylindrical outer tube, a plurality of constraint rings, a plurality of constraint walls and a plurality of constraint beams, wherein the constraint rings are arranged on the cylindrical outer tube at equal intervals, the constraint walls are cylindrical, the constraint walls are sleeved in the cylindrical outer tube, the constraint beams are arranged between the cylindrical outer tube and the constraint walls and between the adjacent constraint walls, each constraint beam is connected with the two adjacent constraint walls through two support plates, and the constraint beams are in a circular tube shape. According to the radial and axial macroscopic and microscopic structures of the bamboo, the structural characteristic parameters affecting the energy absorption and bearing of the bamboo are extracted, the distribution rule of bamboo joints along with the height of the bamboo poles is obtained macroscopically, and the gradient distribution rule of fiber bundles along with green bamboo, flesh bamboo and yellow bamboo is obtained microscopically. According to the bamboo joint appearance form of the discrete distribution of the bamboo, a macroscopic structure of the bionic energy absorption tube is designed, and according to the gradient distribution of bamboo in radial fiber bundles and the characteristics of a cell wall multilayer structure, an internal structure of the bionic energy absorption tube is designed. The structure can improve the bearing capacity of the structure in the transverse direction besides improving the axial energy absorption. In addition, the invention also adopts a finite element simulation test to carry out the simulation test.
Chinese patent CN102826062a provides an energy absorber, which comprises an expansion rod and an energy-absorbing tube, wherein the expansion rod is disposed in the energy-absorbing tube, the hardness of the convex portion is greater than that of the energy-absorbing tube, a convex portion is disposed on the outer side wall of the expansion rod, the outer diameter of the expansion rod with the convex portion is greater than the inner diameter of the energy-absorbing tube, and the expansion rod is clamped on the inner side wall of the energy-absorbing tube through the convex portion. By adopting the energy absorption device with the structure, when collision occurs, the expansion rod applies acting force to the energy absorption tube through the convex part, and resistance resisting impact is generated through plastic deformation of the energy absorption tube, so that stable energy absorption is realized.
The energy-absorbing components commonly adopted at present are mostly composed of homogeneous materials, and the difficulty of a composite structure manufactured by adopting heterogeneous materials such as fiber composite materials, metals and the like is high, and the kink resistance and directional energy absorption of the composite structure still need to be improved, so how to provide a fiber composite bionic composite structure component with high kink resistance and high directional energy absorption is a technical problem to be solved by the technicians in the field.
Disclosure of Invention
The invention aims to provide a fiber composite bionic composite structural member with torsion resistance, buffering and energy absorption so as to overcome the defects in the prior art.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a fiber composite material bionic composite structural member with torsion resistance, folding resistance, buffering and energy absorption, which consists of an inner layer, an intermediate layer and an outer layer;
the inner layer is a buckling-induction type metal with a negative poisson ratio and multiple holes;
the middle layer is a hollow cylindrical metal shell contacted with the porous metal;
the outer layer is a fiber composite layer wound on the hollow cylindrical metal shell.
Preferably, the inner layer is an elliptical hole through hole metal structure imitating a sea urchin thorn inner layer structure, the whole structure of the porous metal is formed by alternately combining transverse elliptical holes and longitudinal elliptical holes, and the ratio of ellipse Kong Duanzhou to a long axis is 1: 1.8-7, the porosity is 43-92%, the thickness of the hole edge between the adjacent transverse elliptical holes and the longitudinal elliptical holes is more than or equal to 0.5mm, and the minor axis of the aperture is 2-3 times of the thickness of the hole edge.
Preferably, the middle layer is a hollow cylindrical metal shell contacted with porous metal, the hollow cylindrical metal shell is of a sea urchin-like growth ring structure, the height of the hollow cylindrical metal shell is the same as that of the inner layer structure, and the thickness of the cylinder wall is 1.3-2 times that of the inner layer Kong Leng.
Preferably, the thickness of the fiber composite layer is 1/10-1/2 of the thickness of the middle layer, and the height is the same as that of the inner layer structure;
the fiber composite material is a carbon fiber reinforced epoxy resin composite material.
Preferably, the metal in the step (1) and the metal shell in the step (2) are respectively and independently aluminum alloy or steel.
The invention also provides a preparation method of the fiber composite bionic composite structural member with the functions of torsion resistance, buffering and energy absorption, which comprises the following steps:
(1) Preparing an inner layer and an intermediate layer by adopting a laser selective melting technology;
(2) And (3) soaking the carbon fibers in epoxy resin to obtain carbon fiber reinforced epoxy resin prepreg yarns, winding the carbon fiber reinforced epoxy resin prepreg yarns on the middle layer, and curing to obtain the fiber composite material bionic composite structural member with torsion resistance, buffering and energy absorption.
Preferably, the technological parameters of the laser selective melting technology are as follows: the scanning angle is 50-70 degrees, the laser power is 1500-2500W, the scanning speed is 10-14 m/s, the layer thickness is 0.02-0.05 mm, and the powder feeding speed is 13-13.5 g/min.
Preferably, the soaking time of the carbon fiber in the epoxy resin is 0.5-3 h.
Preferably, winding carbon fiber reinforced epoxy resin prepreg yarns comprises winding 4-16 layers by taking a cylindrical metal shell as a mould by adopting the prepreg yarns, and dividing the winding into circumferential winding and spiral winding, wherein the circumferential winding is 2-8 layers, and the winding tension is 15-25N; spiral winding for 2-8 layers, winding angle of 13-17 degrees, winding tension of 15-25N, and circumferential winding and spiral winding alternately performed according to each 1-3 layers;
the circumferential winding and the spiral winding are not sequential.
Preferably, the curing step is 70-100 ℃/1.3-1.8 hours; 140-170 ℃/1.5-2.5 h; 80-100 ℃/0.8-1.2 h.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a fiber composite material bionic composite structural member with torsion resistance, buffering and energy absorption, wherein the core part is of a negative poisson ratio porous metal structure, is in a sea urchin thorn shape, the middle layer is of a metal shell, and imitates the shape of a growth ring of the sea urchin thorn; the negative poisson's ratio structure shrinks laterally when compressed and expands laterally when stretched, and the structure has better kink resistance than a general porous structure.
The outer layer structure of the invention is a carbon fiber reinforced epoxy resin composite shell, which is manufactured by taking the middle layer cylindrical metal shell as a core mould and adopting a winding process, and the process can promote the heterogeneous connection strength of the fiber composite material and the metal material and has good protection effect on the inner layer.
Drawings
FIG. 1 is a schematic view of a fiber composite bionic composite structure member with anti-kink and buffering energy absorption prepared in example 1 of the present invention;
FIG. 2 is a physical diagram of a fiber composite bionic composite structure member with anti-kink and buffering energy absorption prepared in example 1 of the present invention;
FIG. 3 is a schematic cross-sectional view of a fiber composite bionic composite structure member with anti-kink and buffering energy absorption prepared in example 1 of the present invention;
fig. 4 is a schematic cross-sectional view of a transverse and longitudinal elliptical hole alternating structure of porous metal of an inner layer of a fiber composite bionic composite structure member with anti-kink and buffering energy absorption prepared in example 1 of the present invention.
Fig. 5 is a graph showing the performance of the fiber composite hollow tube composite structural member prepared in comparative example 1 and the fiber composite bionic composite structural member prepared in example 1.
1. An inner porous metal structure, a middle metal shell and an outer fiber composite shell.
Detailed Description
The invention provides a fiber composite material bionic composite structural member with torsion resistance, folding resistance, buffering and energy absorption, which consists of an inner layer, an intermediate layer and an outer layer;
the inner layer is a buckling-induction type metal with a negative poisson ratio and multiple holes;
the middle layer is a hollow cylindrical metal shell contacted with the porous metal;
the outer layer is a fiber composite layer wound on the hollow cylindrical metal shell.
In the invention, the inner layer is an elliptical hole through hole metal structure imitating a sea urchin thorn inner layer structure, the whole structure of the porous metal is formed by alternately combining transverse elliptical holes and longitudinal elliptical holes, and the ratio of ellipse Kong Duanzhou to long axis is 1:1.8 to 7, preferably 1:5 to 6, the porosity is 43 to 92 percent, preferably 50 to 80 percent, the minimum Kong Leng thickness between the adjacent transverse elliptical holes and the longitudinal elliptical holes is more than or equal to 0.5mm, preferably more than or equal to 1mmmm, and the Kong Duanzhou size is 2 to 3 times, preferably 2.2 to 2.8 times of the thickness of the hole edges.
In the invention, the middle layer is a hollow cylindrical metal shell contacted with porous metal, the hollow cylindrical metal shell is of a sea urchin-like shell structure, the height of the hollow cylindrical metal shell is the same as that of the inner layer structure, and the thickness of the cylinder wall is 1.3-2 times, preferably 1.5-1.8 times, that of the inner layer Kong Leng.
In the invention, the thickness of the fiber composite material layer is 1/10-1/2 of the thickness of the middle layer, preferably 1/5-1/3, and the height is the same as that of the inner layer structure;
the fiber composite material is a carbon fiber reinforced epoxy resin composite material.
In the present invention, the metal of step (1) and the metal shell of step (2) are each independently an aluminum alloy or steel, preferably an aluminum alloy.
The invention also provides a preparation method of the fiber composite bionic composite structural member with the functions of torsion resistance, buffering and energy absorption, which comprises the following steps:
(1) Preparing an inner layer and an intermediate layer by adopting a laser selective melting technology;
(2) And (3) soaking the carbon fibers in epoxy resin to obtain carbon fiber reinforced epoxy resin prepreg yarns, winding the carbon fiber reinforced epoxy resin prepreg yarns on the middle layer, and curing to obtain the fiber composite material bionic composite structural member with torsion resistance, buffering and energy absorption.
In the invention, the technological parameters of the laser selective melting technology are as follows: the scanning angle is 50-70 degrees, preferably 55-65 degrees, the laser power is 1500-2500W, preferably 1800-2200W, the scanning speed is 10-14 m/s, preferably 11-13 m/s, the layer thickness is 0.02-0.05 mm, preferably 0.03-0.04 mm, and the powder feeding speed is 13-13.5 g/min, preferably 13.1-13.3 g/min.
In the invention, the soaking time of the carbon fiber in the epoxy resin is 0.5-3 h, preferably 1-2 h.
In the invention, winding carbon fiber reinforced epoxy resin prepreg yarns are wound in 4-16 layers, preferably 8-12 layers, by taking a cylindrical metal shell as a mould, and are divided into circumferential winding and spiral winding, wherein the circumferential winding is 2-8 layers, preferably 4-6 layers, and the winding tension is 15-25N, preferably 18-22N; spiral winding 2-8 layers, preferably 4-6 layers, with a winding angle of 13-17 degrees, preferably 14-16 degrees, a winding tension of 15-25N, preferably 18-22N, and circumferential winding and spiral winding alternately performed every 1-3 layers, preferably 2 layers;
the circumferential winding and the spiral winding are not sequential.
In the invention, the curing step is 70-100 ℃/1.3-1.8 h; 140-170 ℃/1.5-2.5 h; 80-100 ℃/0.8-1.2 h;
preferably 80-900 ℃/1.4-1.6 h; 155-165 ℃/1.8-2.2 h; 85-90 ℃/0.9-1 h.
The technical solutions provided by the present invention are described in detail below with reference to examples, but they should not be construed as limiting the scope of the present invention.
Example 1
A preparation method of a fiber composite bionic composite structural member with torsion resistance, folding resistance and buffering energy absorption comprises the following steps:
(1) The inner layer and the middle layer structure are prepared by adopting a laser selective melting technology, and the process parameters are as follows: the scanning angle is 67 degrees, the laser power is 2200W, the scanning speed is 12m/s, the layer thickness is 0.03mm, the powder feeding (316L stainless steel) speed is 13.2g/min, and the auxiliary support is removed after the preparation is finished.
(2) And (3) soaking the carbon fibers in the resin liquid for 0.5h, so that the resin is easy to fully soak the carbon fibers, and the carbon fiber reinforced epoxy resin prepreg yarn is prepared. Winding 4 layers by taking a cylindrical metal shell as a mould by adopting prepreg yarns, wherein 2 layers are wound in a circumferential direction, and the winding tension is 20N; the winding is spirally wound for 2 layers, the winding angle is 15 degrees, and the winding tension is 20N. The hoop winding and the spiral winding are alternately performed every 2 layers. And (3) curing after winding is finished, wherein the process is 90 ℃/1.5-140 ℃/2-90 ℃/1h.
The inner layer of the obtained fiber composite bionic composite structural member with torsion resistance and buffering energy absorption is an elliptical hole metal (316L stainless steel) structure imitating a sea urchin thorn inner layer structure, the porous structure is formed by alternately combining transverse elliptical holes and longitudinal elliptical holes, the ratio of a short axis to a long axis is 1:1.8, the porosity is 72%, the minimum hole edge thickness between adjacent transverse elliptical holes and longitudinal elliptical holes is 0.5mm, the ellipse Kong Duanzhou is 1mm, 6 units are transversely arranged on the diameter of a tangent plane, 6 units are longitudinally arranged (each unit comprises a transverse elliptical hole, a longitudinal elliptical hole and Kong Leng therebetween), the elliptical centers of the 6 units are on a straight line (namely, the included angle between the adjacent 2 units is 180 °), and the included angle between the longitudinal elliptical center connecting line of the tangent plane and the longitudinal elliptical center connecting line is 90 °;
the hollow cylindrical metal (316L stainless steel) shell of the middle layer has the same height as the inner layer structure, and the thickness of the cylinder wall is 1.8 times that of the inner layer Kong Leng;
the outermost layer is made of carbon fiber reinforced epoxy resin composite material, the composite material is hollow cylinder-shaped, and the thickness of the composite material is 1/2 of the thickness of the middle layer.
Example 2
A preparation method of a fiber composite bionic composite structural member with torsion resistance, folding resistance and buffering energy absorption comprises the following steps:
(1) The inner layer and the middle layer structure are prepared by adopting a laser selective melting technology, and the process parameters are as follows: the scanning angle is 58 degrees, the laser power is 1800W, the scanning speed is 12m/s, the layer thickness is 0.03mm, the powder feeding (steel powder) speed is 13.2g/min, and the auxiliary support is removed after the preparation is finished.
(2) And (3) soaking the carbon fibers in the resin liquid for 2 hours, so that the resin is easy to fully soak on the carbon fibers, and the carbon fiber reinforced epoxy resin prepreg yarn is prepared. Winding 4 layers by taking a cylindrical metal shell as a mould by adopting prepreg yarns, wherein 2 layers are wound in a circumferential direction, and the winding tension is 20N; the winding is spirally wound for 2 layers, the winding angle is 15 degrees, and the winding tension is 20N. The hoop winding and the spiral winding are alternately performed every 2 layers. Curing after winding is finished, wherein the process is 80 ℃/1.5-160 ℃/2-90 ℃/1h.
The obtained fiber composite material heterogeneous member with torsion resistance and buffering energy absorption is of an elliptical hole metal (316L steel) structure imitating a sea urchin thorn inner layer structure, the porous structure is formed by alternately combining transverse elliptical holes and longitudinal elliptical holes, the ratio of a short axis to a long axis is 1:7, the porosity is 56%, the minimum hole edge thickness between the adjacent transverse elliptical holes and longitudinal elliptical holes is 2mm, 8 units are transversely and longitudinally divided on the diameter of a section (each unit comprises a transverse elliptical hole, a longitudinal elliptical hole and Kong Leng between the transverse elliptical holes), the elliptical centers of the 8 units in the transverse (or longitudinal) direction of the section are all on the same straight line (namely, the included angle between the adjacent 2 units is 180 degrees), and the included angle between the connecting line of the longitudinal elliptical centers of the section and the connecting line of the transverse elliptical centers is 90 degrees;
the hollow cylindrical metal (316L stainless steel) shell of the middle layer has the same height as the inner layer structure, and the thickness of the cylinder wall is 1.6 times of that of the inner layer Kong Leng;
the outermost layer is made of carbon fiber reinforced epoxy resin composite material, the composite material is hollow cylinder-shaped, and the thickness of the composite material is 1/10 of the thickness of the middle layer.
Example 3
A preparation method of a fiber composite bionic composite structural member with torsion resistance, folding resistance and buffering energy absorption comprises the following steps:
(1) The inner layer and the middle layer structure are prepared by adopting a laser selective melting technology, and the process parameters are as follows: the scanning angle is 58 degrees, the laser power is 1900W, the scanning speed is 12m/s, the layer thickness is 0.03mm, the powder feeding (aluminum powder) speed is 13.2g/min, and the auxiliary support is removed after the preparation is finished.
(2) And (3) soaking the carbon fibers in the resin liquid for 1h, so that the resin is easy to fully soak on the carbon fibers, and preparing the carbon fiber reinforced epoxy resin prepreg yarns. Winding 16 layers by taking a cylindrical metal shell as a mould through prepreg yarns, wherein 8 layers are wound in a circumferential direction, and the winding tension is 20N; spiral winding 8 layers, winding angle 15 degrees and winding tension 20N. The hoop winding and the spiral winding are alternately performed every 2 layers. Curing after winding is finished, wherein the process is 70 ℃ to 1.5 ℃ to 160 ℃ to 2 ℃ to 90 ℃ to 1h.
The obtained fiber composite heterogeneous member with anti-twisting and buffering energy absorption is of an elliptical hole metal (AlSi 10Mg aluminum alloy) structure imitating a sea urchin thorn inner layer structure, the porous structure is formed by alternately combining transverse elliptical holes and longitudinal elliptical holes, the ratio of a short axis to a long axis is 1:7, the porosity is 68%, the minimum hole edge thickness between the adjacent transverse elliptical holes and longitudinal elliptical holes is 2mm, kong Duanzhou is 4mm, 10 units are transversely and longitudinally arranged on the diameter of a section (each unit comprises a transverse elliptical hole, a longitudinal elliptical hole and Kong Leng therebetween), the elliptical centers of the 10 units in the transverse direction (or the longitudinal direction) of the section are all on the same straight line (namely, the included angle between the adjacent 2 units is 180 °), and the included angle between the connecting line of the center of the longitudinal ellipse of the section and the connecting line of the center of the transverse ellipse is 90 °;
the hollow cylindrical metal (AlSi 10Mg aluminum alloy) shell of the middle layer has the same height as the inner layer structure, and the thickness of the cylinder wall is 2 times of that of the inner layer Kong Leng;
the outermost layer is made of carbon fiber reinforced epoxy resin composite material, the composite material is hollow cylinder-shaped, and the thickness of the composite material is 1/2 of the thickness of the middle layer.
Comparative example 1
Comparative example 1 differs from example 1 in that a fiber composite hollow tube composite structural member was produced without the inner core structure.
As shown in fig. 5, the performance of the fiber composite hollow tube composite structural member prepared in comparative example 1 and the performance of the fiber composite bionic composite structural member prepared in example 1 were compared, wherein the fiber composite hollow tube composite structure consists of a fiber composite outer shell and a hollow steel tube inner layer in contact with the fiber composite outer shell, and the fiber composite bionic composite structure is the structure of the invention. As shown in the figure, the torsional rigidity of the fiber composite bionic composite structure is improved by 4.28% compared with that of a fiber composite hollow tube composite structure.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.

Claims (10)

1. The fiber composite material bionic composite structure member with the functions of torsion resistance, folding resistance and buffering energy absorption is characterized by comprising an inner layer, an intermediate layer and an outer layer;
the inner layer is a buckling-induction type metal with a negative poisson ratio and multiple holes;
the middle layer is a hollow cylindrical metal shell contacted with the porous metal;
the outer layer is a fiber composite layer wound on the hollow cylindrical metal shell.
2. The fiber composite bionic composite structure member with torsion resistance and buffering energy absorption according to claim 1, wherein the inner layer is an elliptical hole through hole metal structure imitating a sea urchin thorn inner layer through hole structure, the whole porous metal structure is formed by alternately combining transverse elliptical holes and longitudinal elliptical holes, and the ratio of ellipse Kong Duanzhou to long axis is 1: 1.8-7, the porosity is 43-92%, the thickness of the hole edge between the adjacent transverse elliptical holes and the longitudinal elliptical holes is more than or equal to 0.5mm, and the aperture minor axis is 2-3 times of the thickness of the hole edge.
3. The fiber composite bionic composite structure member with torsion resistance and buffering energy absorption according to claim 1 or 2, wherein the middle layer is a hollow cylindrical metal shell in contact with porous metal, the hollow cylindrical metal shell is of a sea urchin-like growth ring structure, the height of the hollow cylindrical metal shell is the same as that of the inner layer structure, and the thickness of the cylinder wall is 1.3-2 times that of the inner layer Kong Leng.
4. The fiber composite bionic composite structure member with torsion resistance and buffering energy absorption according to claim 1, wherein the thickness of the fiber composite layer is 1/10-1/2 of the thickness of the middle layer, and the height is the same as that of the inner layer structure;
the fiber composite material is a carbon fiber reinforced epoxy resin composite material.
5. The fiber composite bionic composite structure member with torsion resistance and energy absorption buffering according to claim 1, 2 or 4, wherein the metal in the step (1) and the metal shell in the step (2) are respectively and independently made of aluminum alloy or steel.
6. The method for preparing the fiber composite bionic composite structure member with torsion resistance and buffering energy absorption according to any one of claims 1 to 5, which is characterized by comprising the following steps:
(1) Preparing an inner layer and an intermediate layer by adopting a laser selective melting technology;
(2) And (3) soaking the carbon fibers in epoxy resin to obtain carbon fiber reinforced epoxy resin prepreg yarns, winding the carbon fiber reinforced epoxy resin prepreg yarns on the middle layer, and curing to obtain the fiber composite material bionic composite structural member with torsion resistance, buffering and energy absorption.
7. The method for preparing the fiber composite bionic composite structure member with torsion resistance and buffering energy absorption according to claim 6, wherein the technological parameters of the laser selective melting technology are as follows: the scanning angle is 50-70 degrees, the laser power is 1500-2500W, the scanning speed is 10-14 m/s, the layer thickness is 0.02-0.05 mm, and the powder feeding speed is 13-13.5 g/min.
8. The method for preparing the fiber composite bionic composite structural member with torsion resistance and buffering energy absorption according to claim 6 or 7, wherein the soaking time of the carbon fiber in the epoxy resin is 0.5-3 h.
9. The method for preparing the fiber composite bionic composite structure member with torsion resistance and buffering energy absorption according to claim 8, wherein winding carbon fiber reinforced epoxy resin prepreg yarns are wound in 4-16 layers by taking a cylindrical metal shell as a mould and are divided into circumferential winding and spiral winding, wherein the circumferential winding is 2-8 layers, and the winding tension is 15-25N; spiral winding for 2-8 layers, winding angle of 13-17 degrees, winding tension of 15-25N, and circumferential winding and spiral winding alternately performed according to each 1-3 layers;
the circumferential winding and the spiral winding are not sequential.
10. The method for preparing the fiber composite bionic composite structure member with torsion resistance and buffering energy absorption according to claim 6, wherein the curing step is 70-100 ℃/1.3-1.8 h; 140-170 ℃/1.5-2.5 h; 80-100 ℃/0.8-1.2 h.
CN202211500837.3A 2022-11-28 2022-11-28 Fiber composite bionic composite structural member and preparation method thereof Pending CN116118296A (en)

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