CN213808339U - Connecting system for parallel thin plates made of composite materials - Google Patents
Connecting system for parallel thin plates made of composite materials Download PDFInfo
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- CN213808339U CN213808339U CN202022648185.0U CN202022648185U CN213808339U CN 213808339 U CN213808339 U CN 213808339U CN 202022648185 U CN202022648185 U CN 202022648185U CN 213808339 U CN213808339 U CN 213808339U
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Abstract
The utility model discloses a connecting system of parallel sheet metal of combined material. The connecting system comprises a first composite parallel sheet; the first composite material parallel thin plate and the second composite material parallel thin plate are in lap joint; the curved surface clamping plate is arranged in the lap joint area of the first composite material parallel thin plate and the second composite material parallel thin plate, and a fastening bolt and a nut are arranged on the curved surface clamping plate and used for fixing the curved surface clamping plate. The utility model discloses make the connection of the parallel sheet metal of combined material safer, reliable, high-efficient, and easy operation, extensive applicability, engineering practicality are strong.
Description
Technical Field
The utility model relates to a combined material technical field, particularly, the utility model relates to a parallel sheet metal's of combined material connection system.
Background
The composite material has the advantages of light weight, high strength, corrosion resistance and excellent fatigue performance, so that the composite material has common application in the fields of buildings, machinery, automobiles and the like, the composite material is an anisotropic material and can not realize effective connection of the composite material by welding like metal, and the effective connection technology of the composite material is the premise that the composite material can be widely applied, in particular the connection of tension members of the composite material. The existing composite material connecting technology mainly is a glue joint technology, and the composite material glue joint technology has the advantages of small joint stress concentration, continuous fibers, good fatigue resistance, smooth connecting surface, light weight and the like. Several typical types of glued joints commonly found in engineering today are classified: single lap joint, double lap joint, cover plate lap joint, butt joint, step-shaped lap joint, wedge-shaped lap joint and the like. The single lap joint of gluing is the simplest and most widely used form of gluing, but the edge of the single lap joint has larger peeling stress, so that the bearing capacity of the lap joint is lower, and the high strength advantage of the composite material cannot be fully exerted.
SUMMERY OF THE UTILITY MODEL
The present invention aims at solving at least one of the technical problems in the related art to a certain extent. To this end, an object of the present invention is to provide a connection system for parallel sheets of composite material. The utility model discloses make the connection of the parallel sheet metal of combined material safer, reliable, high-efficient, and easy operation, extensive applicability, engineering practicality are strong.
The utility model provides a connecting system of parallel sheet metal of combined material. According to the utility model discloses an embodiment, this parallel sheet metal's of combined material connection system includes:
a first composite parallel sheet;
the first composite material parallel thin plate and the second composite material parallel thin plate are in lap joint;
the curved surface clamping plate is arranged in the lap joint area of the first composite material parallel thin plate and the second composite material parallel thin plate, and a fastening bolt and a nut are arranged on the curved surface clamping plate and used for fixing the curved surface clamping plate.
According to the connecting system of the parallel thin plates of the composite materials of the embodiment of the utility model, the contact area of the parallel thin plates of the first composite materials and the parallel thin plates of the second composite materials at the lap joint area is increased by lapping the parallel thin plates of the first composite materials and the parallel thin plates of the second composite materials alternately, so that the friction force of the parallel thin plates of the first composite materials and the contact area of the parallel thin plates of the second composite materials are increased, and the strength of the composite materials is fully utilized; the curved surface clamping plate can apply pretightening force to the lapping area, reduce the peeling stress of the lapping area, and realize effective connection of the composite material parallel thin plates at two ends through the combined action of friction force and mechanical biting force. The utility model discloses make the connection of the parallel sheet metal of combined material safer, reliable, high-efficient, and easy operation, extensive applicability, engineering practicality are strong.
In addition, the connection system of the composite material parallel thin plates according to the above embodiments of the present invention may also have the following additional technical features:
in some embodiments of the present invention, the curved surface clamping plate includes a first curved surface clamping plate and a second curved surface clamping plate, the first curved surface clamping plate and the second curved surface clamping plate are respectively disposed on the upper and lower surfaces of the overlapping region, and the first curved surface clamping plate and the second curved surface clamping plate pass through the fastening bolt and the nut.
In some embodiments of the present invention, the first composite parallel sheet and the second composite parallel sheet are each a single layer or a multilayer.
In some embodiments of the present invention, the overlapping area of the first composite parallel sheet and the second composite parallel sheet is impregnated with adhesive glue. Thereby, bonding the first composite parallel sheet and the second composite parallel sheet in an overlapping relationship increases the bonding force in the overlapping region of the first composite parallel sheet and the second composite parallel sheet.
In some embodiments of the present invention, the two ends of the curved surface clamping plate are close to the surface of the lap joint region, and the surface between the two straight sections is a corrugated curve.
In some embodiments of the present invention, the length of the straight section is 3cm to 5 cm. Therefore, the composite material parallel thin plates at the two ends are enabled to be stressed on the same straight line.
In some embodiments of the present invention, the curvature radius of the corrugation is 100mm to 200 mm.
In some embodiments of the present invention, the material of the first composite material parallel thin plate and the second composite material parallel thin plate is glass fiber, basalt fiber or hybrid fiber, and the length of the curved splint is 100-times and 150-times the thickness of the single-layer composite material plate.
In some embodiments of the present invention, the material of the first composite material parallel thin plate and the second composite material parallel thin plate is carbon fiber, and the length of the curved surface clamping plate is 150-200 times the thickness of the single-layer composite material plate.
In some embodiments of the present invention, the fastening bolts include two rows along the length direction of the composite material parallel thin plate, and the two rows are respectively disposed on two sides of the composite material parallel thin plate, and each row includes at least two fastening bolts.
In some embodiments of the present invention, the distance between the two rows of fastening bolts is not less than the width of the composite material parallel thin plate, and the difference between the two is less than 2 mm. Thereby ensuring that the two end composite sheets are aligned.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a connection system of composite parallel sheets according to an embodiment of the present invention.
Fig. 2 is an elevation view of a connection system for parallel sheets of composite material according to an embodiment of the present invention.
Fig. 3 is a top view of a connection system for parallel sheets of composite material according to an embodiment of the present invention.
Fig. 4 is a schematic structural view of a curved steel sandwich plate of a connection system of parallel thin plates made of composite materials according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, e.g., two, three, four, five, six, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
The utility model provides a connecting system of parallel sheet metal of combined material. Referring to fig. 1 to 3, according to an embodiment of the present invention, the connection system of the composite material parallel thin plate includes: the first composite material parallel thin plate 10, the second composite material parallel thin plate 20, the curved clamping plate 30, the fastening bolt 40 and the nut 50.
According to the embodiment of the utility model, refer to fig. 1 ~ 3, the parallel sheet metal of first combined material 10 and the parallel sheet metal of second combined material 20, the parallel sheet metal of first combined material with the mutual overlap joint of the parallel sheet metal of second combined material. The first composite material parallel thin plate and the second composite material parallel thin plate are overlapped alternately, so that the contact area of the first composite material parallel thin plate and the second composite material parallel thin plate at the overlapping area is increased, the friction force of the first composite material parallel thin plate and the second composite material parallel thin plate is increased, and the strength of the composite material is fully utilized. The first composite material parallel thin plate and the second composite material parallel thin plate can be single-layer or multi-layer.
In the embodiment of the present invention, the material of the first composite material parallel thin plate and the second composite material parallel thin plate is not particularly limited, and those in the art can select at will, as a preferred scheme, the material of the first composite material parallel thin plate is glass fiber, carbon fiber, basalt fiber or hybrid fiber, and the material of the second composite material parallel thin plate is glass fiber, carbon fiber, basalt fiber or hybrid fiber.
According to the utility model discloses a specific embodiment, the parallel sheet metal of first combined material with the overlap joint region of the parallel sheet metal of second combined material is soaked with the bonding glue for the interactive lapped parallel sheet metal of first combined material with the parallel sheet metal of second combined material of bonding has increased the parallel sheet metal of first combined material with the bonding force of the overlap joint region of the parallel sheet metal of second combined material. The specific type of the adhesive is not particularly limited, and may be arbitrarily selected by those skilled in the art, and as a specific example, the adhesive is an epoxy adhesive that is cured at normal temperature or medium temperature.
According to a further embodiment of the invention, the composite material sheets of the same end are parallel and the two ends are aligned.
According to the utility model discloses an embodiment, refer to attached figure 1 ~ 3, curved surface splint 30, the curved surface splint set up first parallel sheet metal of combined material with the overlap joint region of the parallel sheet metal of second combined material, be equipped with fastening bolt 40 and nut 50 on the curved surface splint, fastening bolt and nut are used for fixing the curved surface splint. The curved surface clamping plate is used for fixing the lapping area of the first composite material parallel thin plate and the second composite material parallel thin plate, pretightening force can be applied to the lapping area by the curved surface clamping plate, the peeling stress of the lapping area is reduced, and effective connection of the composite material parallel thin plates at two ends is realized through combined action of friction force and mechanical biting force.
According to the utility model discloses a specific embodiment, refer to fig. 1, curved surface splint 30 includes first curved surface splint 31 and second curved surface splint 32, first curved surface splint with second curved surface splint set up respectively overlap joint region's two upper and lower surfaces, first curved surface splint with second curved surface splint pass through fastening bolt 40 and nut 50 are connected. The lapping area is clamped in the middle through the first curved surface clamping plate 31 and the second curved surface clamping plate 32, pretightening force is applied, so that the purpose of reducing the stripping stress of the lapping area is achieved, and effective connection of the composite material parallel thin plates at two ends is realized through the combined action of friction force and mechanical biting force.
According to the utility model discloses a still another embodiment, refer to figure 4, curved surface splint both ends are close to the regional surface of overlap joint is straight section, guarantees that the parallel sheet metal atress of both ends combined material is on a straight line. Further, the length of the straight section is 3cm-5cm, so that the composite material parallel thin plates at two ends are better guaranteed to be stressed on the same straight line.
According to the utility model discloses a further embodiment, the surface between the straight section of both ends is the ripple curve, and the function curve of ripple can get the arithmetic combination of four fundamental operations of polynomial function and trigonometric function. As a preferred solution, the shape function of the ripple curve is:
wherein L is0Denotes the corrugation length, A denotes the maximum height of the corrugation, f0(x) For a waveform function, x represents the lengthwise coordinate of the waveform, and the first third derivative of the shape function is equal to 0 at x or equal to L at x0The time is zero, so that the composite plate has no bending moment and no shear sudden change at two end points of the corrugated section.
According to another embodiment of the present invention, the curvature radius of the corrugation is 100mm-200mm, and the utility model discloses people find that if the curvature radius is too small can lead to the compound plate producing damage in the clamping process, and the too big curvature radius can lead to the mechanical bite force after the compound plate clamping too small to connect effectively. After the pretightening force is applied, the composite material parallel thin plates at two ends are effectively connected through the combined action of the adhesive force, the friction force and the mechanical biting force.
In the embodiment of the present invention, the length of the overlapping area (i.e. the length of the curved surface splint) needs to be designed according to the material type of the composite material thin plate, when the material of the first composite material parallel thin plate and the second composite material parallel thin plate is glass fiber, basalt fiber or hybrid fiber thin plate, the overlapping length is generally 100-fold and 150-fold thick single-layer composite plate; when the first composite material parallel thin plate and the second composite material parallel thin plate are both made of carbon fiber thin plates, the lapping length is generally 150-200 times of the thickness of a single-layer carbon fiber plate.
According to the utility model discloses a further embodiment, fastening bolt's quantity and interval are designed according to the length (the length of curved surface splint promptly) of overlap joint region, are one row along the parallel sheet metal length direction of combined material, including two rows, set up respectively the both sides of the parallel sheet metal of combined material, every row include two at least fastening bolt, every row of bolt is parallel with the parallel sheet metal of combined material, and the parallel sheet metal length direction of perpendicular combined material is one, and every row has two bolts, and the pretightning force size of one row of bolt can be different, and the pretightning force of a bolt is the same. Therefore, the curved surface clamping plate 30 is ensured to clamp the lapping area in the middle and apply pretightening force, so that the purpose of reducing the peeling stress of the lapping area is achieved, and the effective connection of the composite material parallel thin plates at the two ends is realized through the combined action of the adhesive force, the friction force and the mechanical biting force. Pretightening force can be exerted on the bolt, and the pretightening force can be adjusted through a torque wrench.
According to the utility model discloses a further embodiment, two rows fastening bolt's interval is not less than the width of the parallel sheet metal of combined material, and both differences are less than 2mm, guarantee from this that both ends combined material sheet metal aligns.
According to the connecting system of the parallel thin plates of the composite materials of the embodiment of the utility model, the contact area of the parallel thin plates of the first composite materials and the parallel thin plates of the second composite materials at the lap joint area is increased by lapping the parallel thin plates of the first composite materials and the parallel thin plates of the second composite materials alternately, so that the friction force of the parallel thin plates of the first composite materials and the contact area of the parallel thin plates of the second composite materials are increased, and the strength of the composite materials is fully utilized; the curved surface clamping plate can apply pretightening force to the lapping area, reduce the peeling stress of the lapping area, and realize effective connection of the composite material parallel thin plates at two ends through the combined action of adhesive force, friction force and mechanical biting force. The utility model discloses make the connection of the parallel sheet metal of combined material safer, reliable, high-efficient, and easy operation, extensive applicability, engineering practicality are strong.
For convenience of understanding, the following describes an implementation method of the connection system using the above-mentioned composite material parallel thin plates, and the specific process is as follows:
s1: determining the length and width of the overlap region
In the step, the length of the lap joint area is determined according to the material type and the layer number of the composite material parallel thin plates, and the width of the lap joint area is determined according to the width of the composite material parallel thin plates. Specifically, the lapping length of the glass fiber, basalt fiber and hybrid fiber sheet is generally 150 times the thickness of the single-layer composite material sheet, and the lapping length of the carbon fiber sheet is generally 150 times the thickness of the single-layer carbon fiber sheet.
S2: manufacturing a curved surface clamping plate according to the length and the width of the lap joint area
In this step, according to overlap joint length and width design and processing curved surface steel splint, this embodiment uses HRB235 steel to pass through the line cutting technology preparation, and two steel sheet are whole to cut the unloading and punch to it is unanimous to guarantee upper and lower plate shape.
S3: dipping the lap joint area of the first composite material parallel thin plate and the second composite material parallel thin plate with glue
In the step, the surfaces of the composite material parallel thin plates at two ends are cleaned by acetone reagent, dust on the surface of a test piece and lubricating oil used in linear cutting processing are removed, the lap joint area of the composite material parallel thin plates is dipped, and the structural adhesive is generally epoxy adhesive cured at normal temperature or medium temperature.
S4: performing interactive lap joint on the first composite material parallel thin plate and the second composite material parallel thin plate after gum dipping
In the step, the composite material parallel thin plates at the left end and the right end are overlapped layer by layer in an interactive mode, and after the overlapping is completed, whether the composite material parallel thin plates at the two ends are aligned or not is checked, so that the eccentric or deflection angle installation error is prevented.
S5: clamping the lapping area and applying pretightening force by adopting the curved clamping plate, the fastening bolt and the nut
In this step, pile up the steel splint and connect two sides at the carbon fiber clad sheet to penetrate fastening bolt hole with fastening bolt and fix a position, gradually tighten fastening bolt on the steel splint with the spanner in proper order, the reciprocal transform in bolt position of screwing makes the steel splint evenly compress tightly, screws up until all bolts are preliminary, clears away the structural adhesive that overflows from the steel sheet gap, screws up to the design moment of torsion with torque wrench to all bolts.
S6: the lap joint is cured under appropriate conditions.
The embodiment of the utility model provides a method makes the connection of the parallel sheet metal of combined material safer, reliable, high-efficient, and easy operation, extensive applicability, engineering practicality are strong.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (10)
1. A system for joining parallel sheets of composite material, comprising:
a first composite parallel sheet;
the first composite material parallel thin plate and the second composite material parallel thin plate are in lap joint;
the curved surface clamping plate is arranged in the lap joint area of the first composite material parallel thin plate and the second composite material parallel thin plate, and a fastening bolt and a nut are arranged on the curved surface clamping plate and used for fixing the curved surface clamping plate.
2. The system of connecting parallel composite material sheets according to claim 1, wherein the curved clamping plates include a first curved clamping plate and a second curved clamping plate, the first curved clamping plate and the second curved clamping plate are respectively disposed on the upper surface and the lower surface of the overlapping region, and the first curved clamping plate and the second curved clamping plate are connected by the fastening bolt and the nut.
3. The system of connecting parallel sheets of composite material according to claim 1, wherein the first parallel sheet of composite material and the second parallel sheet of composite material are each a single layer or a plurality of layers;
and the overlapping area of the first composite material parallel thin plate and the second composite material parallel thin plate is impregnated with bonding glue.
4. The system of claim 1, wherein the curved clamping plates have flat sections on both ends adjacent to the overlapping area, and the surface between the flat sections is a corrugated curve.
5. The system of connecting parallel sheets of composite material according to claim 4, wherein said straight sections have a length of 3cm to 5 cm.
6. The system of connecting parallel composite sheets of claim 4 wherein said corrugation has a radius of curvature of 100mm to 200 mm.
7. The connecting system of the parallel sheets of the composite material as claimed in any one of claims 1 to 6, wherein the first parallel sheet of the composite material and the second parallel sheet of the composite material are made of glass fiber, basalt fiber or hybrid fiber, and the length of the curved plywood is 150 times of the thickness of the single-layer composite material.
8. The connecting system of the parallel thin plates of composite materials as claimed in any one of claims 1 to 6, wherein the first parallel thin plate of composite material and the second parallel thin plate of composite material are both made of carbon fiber, and the length of the curved clamping plate is 150-200 times the thickness of the single-layer composite material plate.
9. The system for joining parallel sheets of composite material according to any one of claims 1 to 6, wherein said fastening bolts comprise two rows along the length of said parallel sheet of composite material, said two rows being respectively disposed on both sides of said parallel sheet of composite material, each row comprising at least two of said fastening bolts.
10. The system of claim 9, wherein the distance between the two rows of fastening bolts is not less than the width of the composite parallel thin plates, and the difference between the two rows of fastening bolts is less than 2 mm.
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| CN202022648185.0U CN213808339U (en) | 2020-11-16 | 2020-11-16 | Connecting system for parallel thin plates made of composite materials |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112360853A (en) * | 2020-11-16 | 2021-02-12 | 清华大学 | Connecting system of composite material parallel thin plates and implementation method |
| CN112360853B (en) * | 2020-11-16 | 2024-07-02 | 清华大学 | Connecting system for parallel thin plates of composite material and implementation method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112360853A (en) * | 2020-11-16 | 2021-02-12 | 清华大学 | Connecting system of composite material parallel thin plates and implementation method |
| CN112360853B (en) * | 2020-11-16 | 2024-07-02 | 清华大学 | Connecting system for parallel thin plates of composite material and implementation method |
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