A composite link

Abstract

This invention proposes a composite connecting rod comprising a metal rod and a composite material. The composite connecting rod has an inner cavity, and the composite material comprises an axial composite material and a compressive composite material. The compressive composite material is disposed within the inner cavity, and the axial composite material is wound around the metal rod and onto the outside of the compressive composite material. By using the composite material, the load-bearing capacity of the composite connecting rod under load is fully utilized. The combination of the metal rod and the composite material saves weight, eliminates the need for fasteners, and fully leverages the high-performance advantages of the composite material.

Description

Technical Field

[0001] This invention relates to the field of aircraft structure or other mechanical technology, and more specifically to a composite linkage that can maintain a certain level of functionality and safety in the event of partial damage. Background Technology

[0002] The application of connecting rods in various mechanical products can be divided into two main aspects: one is motion transmission, which is mainly used in system control and motion mechanisms; the other is load transmission, which is mainly used in the main load-bearing parts of the structure, and is mainly composed of high-strength metal materials.

[0003] Currently, load-bearing connecting rods used in the aviation industry are mainly divided into two categories: the first category is connecting rods made entirely of machined metal; the second category is connecting rods composed of composite materials and metals.

[0004] The first type of link described above is entirely made of metal, which results in a significant weight. Therefore, a link is needed that can minimize weight while meeting strength requirements, thereby reducing the overall weight of the aircraft.

[0005] The second type of linkage mentioned above mainly includes two designs:

[0006] The first type consists of a composite material rod and a metal connector to save weight. However, this type of linkage typically connects the composite material rod and the metal connector using fasteners. These fasteners can penetrate the composite material rod, damaging the composite fibers and affecting the stress distribution under load, thus failing to fully utilize the high-performance advantages of the composite material. It may also have drawbacks such as difficulty in inspection, uneven connection quality, and low shear resistance. Furthermore, if this type of linkage is used near aircraft engines, the fasteners are prone to fatigue damage.

[0007] The second type consists of a metal rod and a composite material covering the outside of the metal rod. This linkage design allows the metal rod to continue bearing the force if the composite material fails; conversely, if the metal rod fails, the composite material can continue to bear the force, thus ensuring the safe operation of the entire system. However, the inventors discovered a deficiency in this linkage design: specifically, covering the metal rod with the composite material does not fully utilize the load-bearing capacity of the composite linkage when bearing compressive loads.

[0008] Therefore, an improved composite link is needed that can address at least one of the aforementioned shortcomings. Summary of the Invention

[0009] To address the problems existing in the prior art, the present invention proposes a composite link to achieve at least one of the following objectives: one objective is to fully utilize the load-bearing performance of the composite link under load by using a compression-resistant composite material; another objective is to save weight by combining metal rods with composite materials; and yet another objective is to eliminate the need for fasteners and fully utilize the high-performance advantages of composite materials.

[0010] Therefore, the present invention proposes a composite link comprising a metal rod and a composite material, wherein the composite link forms an inner cavity, the composite material comprises an axial composite material and a compressive composite material, wherein the compressive composite material is arranged in the inner cavity, and the axial composite material is wound around the metal rod and wound around the outside of the compressive composite material.

[0011] According to the above technical solution, the composite connecting rod of the present invention can achieve the following beneficial effects: by using composite materials, the load-bearing performance of the composite connecting rod when bearing loads is fully utilized; by combining metal rods with composite materials, weight is saved; fasteners are not required; and the high performance advantages of composite materials can be fully utilized.

[0012] In this embodiment of the invention, the composite connecting rod further includes a load-bearing rod disposed in the inner cavity. The load-bearing rod has enlarged portions at both ends, which are located outside the inner cavity. The axial composite material is wound around the enlarged portions at both ends, and the axial composite material and the enlarged portions at both ends form the inner cavity.

[0013] According to the above technical solution, the composite connecting rod of the present invention can achieve the following beneficial effects: the load-bearing rod can enhance the load-bearing performance of the composite connecting rod when bearing load.

[0014] In this embodiment of the invention, a compression-resistant composite material is wrapped around the load-bearing bar.

[0015] According to the above technical solution, the composite connecting rod of the present invention can achieve the following beneficial effects: the combination of the compressive composite material and the load-bearing rod enhances the compressive performance of the composite connecting rod, and the compressive composite material plays the role of filling the composite connecting rod and supporting the axial composite material.

[0016] In this embodiment of the invention, the compression-resistant composite material is spirally wound around the load-bearing rod.

[0017] According to the above technical solution, the composite connecting rod of the present invention can achieve the following beneficial effects: the combination of the compressive composite material and the load-bearing rod enhances the compressive performance of the composite connecting rod, and the compressive composite material plays the role of filling the composite connecting rod and supporting the axial composite material.

[0018] In this embodiment of the invention, the metal rod includes two sub-rods and two connecting portions that connect the two sub-rods, with the two sub-rods and the two connecting portions forming an inner cavity.

[0019] According to the above technical solution, the composite connecting rod of the present invention can achieve the following beneficial effects: the sub-rods can enhance the load-bearing performance of the composite connecting rod when bearing load.

[0020] In this embodiment of the invention, the compression-resistant composite material is a composite laminate.

[0021] According to the above technical solution, the composite connecting rod of the present invention can achieve the following beneficial effects: the combination of the compressive composite material and the metal rod enhances the compressive performance of the composite connecting rod, and the compressive composite material plays the role of filling the composite connecting rod and supporting the axial composite material.

[0022] In this embodiment of the invention, the metal rod is made of titanium alloy.

[0023] According to the above technical solution, the composite connecting rod of the present invention can achieve the following beneficial effects: ensuring the strength of the composite connecting rod while saving weight.

[0024] In this embodiment of the invention, the axial composite material is carbon fiber.

[0025] According to the above technical solution, the composite link of the present invention can achieve the following beneficial effects: ensuring the stiffness of the composite link.

[0026] In this embodiment of the invention, the end of the connecting rod is provided with a lug.

[0027] According to the above technical solution, the composite connecting rod of the present invention can achieve the following beneficial effects: it facilitates the connection or installation of the composite connecting rod with other components.

[0028] In this embodiment of the invention, the metal rods and composite materials in the composite linkage are not connected by fasteners.

[0029] According to the above technical solution, the composite connecting rod of the present invention can achieve the following beneficial effects: no fasteners are required, and the high performance advantages of composite materials can be fully utilized.

[0030] It should be understood that the above description of the invention is provided to present a simplified version of the concepts further described in the detailed description. This does not imply the identification of key or essential features of the claimed subject matter, the scope of which is uniquely defined by the appended claims. Furthermore, the claimed subject matter is not limited to embodiments that address any of the shortcomings pointed out above or in any part of this disclosure. Attached Figure Description

[0031] Further features and exemplary embodiments of the invention, as well as its advantages, will be explained in more detail below with reference to the accompanying drawings. It will be understood that this embodiment does not exhaust the full scope of the invention. It will also be understood that some or all of the features described below may be combined in other ways, wherein:

[0032] Figure 1 An assembly schematic diagram of a composite link according to an embodiment of the present invention is shown;

[0033] Figure 2 An exploded view of a composite link according to an embodiment of the present invention is shown;

[0034] Figure 3 An assembled side view of the composite link according to an embodiment of the present invention is shown;

[0035] Figure 4a and 4b Schematic diagrams and cross-sectional views of different configurations of the compressive composite material of the composite link according to embodiments of the present invention are shown;

[0036] Figure 5 A schematic diagram of a composite link according to another embodiment of the present invention is shown.

[0037] List of reference numerals

[0038] 1. Composite connecting rod;

[0039] 100 Metal rods;

[0040] 101 Sub-members;

[0041] 102 Connecting part;

[0042] 103 Earpieces;

[0043] 104. Inner cavity;

[0044] 106 Load-bearing bar;

[0045] 107. Expanded Department;

[0046] 200 compression-resistant composite material;

[0047] 200' compression-resistant composite material;

[0048] 300 axial composite material. Detailed Implementation

[0049] The following describes specific embodiments of the present invention. It should be noted that, in order to provide a concise description, this specification cannot exhaustively describe all features of the actual embodiments. It should be understood that, in the actual implementation of any embodiment, just as in any engineering or design project, various specific decisions are often made to achieve the developer's specific goals and to meet system-related or business-related constraints, and this can change from one embodiment to another. Furthermore, it is understood that although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this invention, some design, manufacturing, or production modifications based on the technical content disclosed herein are merely conventional technical means and should not be construed as insufficient content of this disclosure.

[0050] Unless otherwise defined, the technical or scientific terms used in the claims and description shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in the patent application description and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the element or object preceding "comprising" or "including" encompasses the element or object listed following "comprising" or "including" and its equivalents, and do not exclude other elements or objects. The terms "connected" or "linked" and similar terms are not limited to physical or mechanical connections, nor are they limited to direct or indirect connections. In this document, the term "axial direction" refers to a direction parallel to the direction of extension of the metal rod of the composite link. In this document, the terms "inner side," "outer side," "inward," "outward," "proximal," "far side," etc., are used only to describe the relative positions of the elements.

[0051] The composite link 1 according to the present invention comprises a metal rod 100 and a composite material, the composite link 1 having an inner cavity 104. The composite material comprises an axial composite material 300 for bearing tensile loads and compressive composite materials 200, 200' for bearing compressive loads. The compressive composite materials 200, 200' are arranged in the inner cavity 104 of the composite link 1 and combined with the metal rod 100 to enhance the compressive strength of the composite link 1. The axial composite material 300 is wound around the metal rod 100 and around the outside of the compressive composite materials 200, 200', and combined with the metal rod 100 to enhance the tensile strength of the composite link 1.

[0052] Figure 1 This is an assembly schematic diagram of the composite connecting rod 1 according to an embodiment of the present invention. Figure 2 This is an exploded view of the composite connecting rod 1 according to an embodiment of the present invention. Figure 3 This is a side view of a composite connecting rod 1 according to an embodiment of the present invention.

[0053] like Figure 1-3 As shown, according to an embodiment of the present invention, the composite link 1 includes a metal rod 100 and a composite material, wherein the composite material includes a compressive composite material 200 disposed within the composite rod 1 and an axial composite material 300 wound around the metal rod 100 in the axial direction.

[0054] According to the above technical solution, the composite connecting rod of the present invention can achieve the following beneficial technical effects: no fasteners are used to connect the metal rod and the composite material of the connecting rod, so as to give full play to the high performance advantages of the composite material.

[0055] Specifically, the composite link 1 includes an inner cavity 104, and a compression-resistant composite material 200 is arranged in the inner cavity 104 of the composite link 1. The axial composite material is axially wound around the metal rod 100. Therefore, no fasteners are used to connect the metal rod 100 and the composite material (compression-resistant composite material 200 and axial composite material 300) of the link, so as to give full play to the high performance advantages of the composite material.

[0056] In addition, when the composite link 1 is under tension, the direction of the tensile force is consistent with the direction of the composite fiber, which can better take advantage of the high modulus of the composite fiber; when the composite link is under compression, the direction of the compressive force is consistent with the direction of the composite fiber, which can better take advantage of the high modulus of the composite fiber, thereby enhancing the compressive strength of the link.

[0057] Preferably, such as Figure 1-3 As shown, the metal rod 100 extends axially through the entire composite connecting rod 1.

[0058] According to the above technical solution, the composite link of the present invention can achieve the following beneficial technical effects: it ensures that the metal rod and the composite material bear the load together, rather than only the composite material bears the load, thereby improving the load-bearing strength of the entire composite link.

[0059] Preferably, such as Figure 1-3 As shown, composite link 1 is a link used in aircraft.

[0060] According to the above technical solution, the composite connecting rod of the present invention can achieve the following beneficial technical effects: it can be applied to the field of aerospace technology.

[0061] Preferably, such as Figure 1-3 As shown, the metal rod 100 includes two sub-rods 101 and two connecting portions 102 that connect the two sub-rods 101.

[0062] According to the above technical solution, the composite connecting rod of the present invention can achieve the following beneficial technical effects: by using a suitable metal rod form, the compressive composite material can be conveniently and stably arranged inside the metal rod, and the axial composite material can be conveniently and stably wound around the metal rod axially (i.e., wound around the two connecting parts 102).

[0063] Preferably, such as Figure 1-3 As shown, the compression-resistant composite material 200 is arranged inside the metal rod 100 of the composite connecting rod 1; in other words, the inner cavity 104 is preferably included inside the metal rod 100.

[0064] According to the above technical solution, the composite connecting rod of the present invention can achieve the following beneficial technical effects: in addition to bearing pressure load, the compression-resistant composite material also serves to fill the metal rod and support the axial composite material.

[0065] Preferably, such as Figure 1-3 As shown, the metal rod 100 forms an inner cavity 104 between the two sub-rods 101 and between the two connecting portions 102, and the compression-resistant composite material 200 is disposed in the inner cavity 104.

[0066] According to the above technical solution, the composite connecting rod of the present invention can achieve the following beneficial technical effects: it facilitates the manufacturing of metal rods, reduces the overall weight of the connecting rod, and the compressive composite material plays the role of filling the metal rods and supporting the axial composite material.

[0067] Preferably, such as Figure 1-3 As shown, each sub-rod 101 forms an ear piece 103 by protruding outward from the corresponding connecting part 102.

[0068] According to the above technical solution, the composite connecting rod of the present invention can achieve the following beneficial technical effects: the lugs can facilitate the connection or installation of the composite connecting rod with other components.

[0069] Preferably, such as Figure 1-3 As shown, the metal rod 100 and the composite material in the composite link 1 are not connected by fasteners.

[0070] According to the above technical solution, the composite connecting rod of the present invention can achieve the following beneficial technical effects: no fasteners are used to connect the metal rod and the composite material (axial composite material and compressive composite material) of the connecting rod, so as to give full play to the high performance advantages of the composite material.

[0071] Preferably, such as Figure 1-3 As shown, the metal rod 100 is made of titanium alloy.

[0072] According to the above technical solution, the composite connecting rod of the present invention can achieve the following beneficial technical effects: it can use suitable metal materials to manufacture metal rods, ensuring the strength of metal rods and composite connecting rods.

[0073] Of course, the titanium alloy material mentioned above is only a preferred material form of the metal rod 100 of the composite connecting rod 1 of this application. Those skilled in the art can understand based on the disclosure of this application that other suitable metal materials (e.g., stainless steel) can also be used without departing from the protection scope of the claims of this application.

[0074] Preferably, such as Figure 1-3 As shown, the axial composite material 300 is made of carbon fiber.

[0075] According to the above technical solution, the composite connecting rod of the present invention can achieve the following beneficial technical effects: it can use a suitable composite material to ensure the stiffness of the composite connecting rod.

[0076] Of course, the carbon fiber material mentioned above is only a preferred material form of the axial composite material 300 of the composite connecting rod of this application. Those skilled in the art can understand based on the disclosure of this application that other suitable composite materials (e.g., glass fiber, etc.) can also be used without departing from the protection scope of the claims of this application.

[0077] Preferably, the compression-resistant composite material 200 is a composite laminate.

[0078] Figure 4a and 4b Schematic diagrams and cross-sectional views of different composite laminate configurations of the compressive composite material 200 of the composite connecting rod 1 according to an embodiment of the present invention are shown. Figure 4a An embodiment of a compression-resistant composite 200 is shown, wherein the compression-resistant composite 200 comprises an inner portion consisting of a pure axial fiber laminate and an outer layer of fiber cloth wrapped around the inner portion. Preferably, the pure axially restraining laminate is made of carbon fiber.

[0079] Figure 4b Another configuration of the compression-resistant composite 200 is shown, wherein the compression-resistant composite 200 is a conventional composite laminate configuration and does not have a fiber cloth wrapped around the outside. Preferably, the compression-resistant composite is made of carbon fiber.

[0080] Figure 5 A composite link 1 according to another embodiment of the present invention is shown.

[0081] The composite link 1 includes a metal rod 100 and a composite material. The composite link 1 has an inner cavity 104. The composite material includes a compressive composite 200' disposed in the inner cavity 104 and an axial composite material 300 wound around the metal rod 100 in the axial direction.

[0082] According to the above technical solution, the composite connecting rod of the present invention can achieve the following beneficial technical effects: no fasteners are used to connect the metal rod and the composite material of the connecting rod, so as to give full play to the high performance advantages of the composite material.

[0083] Specifically, the composite link 1 includes a load-bearing rod 106 located within an inner cavity 104. A compression-resistant composite material 200' is arranged within the inner cavity 104 of the composite link 1 and covers the load-bearing rod 106. The axial composite material is axially wound around the metal rod 100. Therefore, no fasteners are used between the metal rod 100 and the composite materials (compression-resistant composite material 200' and axial composite material 300) of the link, fully utilizing the high-performance advantages of the composite material.

[0084] More specifically, an enlarged portion 107 is provided at both ends of the load-bearing rod 106. The enlarged portion 107 is located outside the inner cavity 104. The axial composite material 300 is wound around the enlarged portion 107 at both ends, and the axial composite material 300 and the enlarged portion 107 at both ends form the inner cavity 104.

[0085] Preferably, the load-bearing rod 106 and the enlarged portion 107 are integrally formed, and the load-bearing rod 106 and the enlarged portion 107 constitute the metal rod 100. In other words, the metal rod 100 preferably includes the load-bearing rod 106 and the enlarged portions 107 at both ends.

[0086] Optionally, the support rod 106 is formed of a composite material and is seated between the two enlargements 107. For example, the composite material is carbon fiber. In such an alternative embodiment, the metal rod 100 of the composite link 1 includes enlargements 107 made of metal and a support rod 106 formed of a composite material seated between the two enlargements 107.

[0087] Preferably, the extension direction of the load-bearing rod 106 coincides with the axial direction of the composite connecting rod 1.

[0088] In another embodiment of the present invention, the compression-resistant composite material 200' is wrapped around the load-bearing rod 106.

[0089] According to the above technical solution, the composite connecting rod of the present invention can achieve the following beneficial effects: the combination of the compressive composite material and the load-bearing rod enhances the compressive performance of the composite connecting rod, and the compressive composite material plays the role of filling the composite connecting rod and supporting the axial composite material.

[0090] In another embodiment of the present invention, the compression-resistant composite material 200' is spirally wound around the load-bearing rod 106.

[0091] According to the above technical solution, the composite connecting rod of the present invention can achieve the following beneficial effects: the combination of the compressive composite material and the load-bearing rod enhances the compressive performance of the composite connecting rod, and the compressive composite material plays the role of filling the composite connecting rod and supporting the axial composite material.

[0092] In another embodiment of the invention, the composite connecting rod 1 has lugs at both ends for connecting to other components. More specifically, in Figure 1-3 In the illustrated embodiment, each sub-rod 101 of the metal rod 100 forms an ear piece 103 by protruding outward from the corresponding connecting portion 102. The ear piece 103 has a through hole for connecting with other components; that is, the ear piece 103 functions as a lug for connecting other components. Figure 5 In the embodiment shown, the enlarged portion 107 is configured as a lug for connecting other components, and a through hole is provided on the enlarged portion 107 for connecting with other components.

[0093] The manufacturing and assembly sequence of the composite connecting rod 1 of the present invention can be as follows:

[0094] First, the metal rod 100 and the compression-resistant composite materials 200 and 200' are assembled together. Specifically, the compression-resistant composite material 200 is embedded in the inner cavity 104 of the composite connecting rod 1 or the compression-resistant composite material 200' is wrapped around the load-bearing rod 106. Then, the axial composite material 300 is axially wrapped around the metal rod 100 and around the outside of the compression-resistant composite materials 200 and 200' (that is, the axial composite material 300 is axially wrapped around the combination of the metal rod 100 and the compression-resistant composite material 200).

[0095] The composite connecting rod 1 of the present invention has a breakage safety design: when the composite material is damaged, the metal rod 100 can still bear the force; when the metal rod 100 is damaged, the composite material can still bear the force.

[0096] Specifically, in such Figure 1-3 In one embodiment of the present invention shown, when a single lug 103 is damaged or fails, the other lug 103 bears the load. When the connecting portion 102 is damaged or fails, there are two situations: longitudinal cracks and transverse cracks. A transverse crack is equivalent to the metal rod 100 breaking at the connecting portion 102, in which case the composite material (axial composite material 300 and compressive composite material 200) can still bear the load. A longitudinal crack is equivalent to the metal rod 100 (the two sub-rods 101 at the connecting portion 102) separating, but each part of the separated metal rod 100 (i.e., sub-rods 101) can still bear the load. When the axial composite material 300 or the compressive composite material 200 is damaged or fails, the metal rod 100 bears the load.

[0097] In such Figure 5 In another embodiment of the invention shown, when the load-bearing rod 106 is damaged or fails, the composite material (axial composite material 300 and compressive composite material 200') can still bear the load. When either the axial composite material 300 or the compressive composite material 200' is damaged or fails, the load-bearing rod 106 will bear the load.

[0098] Through simulation analysis, for the composite connecting rod according to various embodiments of the present invention, the number of layers of tensile fiber (i.e., axial composite material) and compressive fiber (i.e., compressive composite material) in ABAQUS is set to 20 layers. To make the simulation results general, the fiber direction is alternately repeated 5 times at 0° / 45° / 90° / -45°. The fiber layers adopt solid elements, and a cohesive layer with a thickness of 0.025mm is inserted between the fiber layers. For the fiber layers, the 3D Hashin damage criterion is used, and it can be found that: under compressive load, the maximum stress position of the composite connecting rod is always on the compressive fiber, and under the same conditions, the composite connecting rod according to the present invention can withstand a larger maximum compressive load than the connecting rod of the prior art; under tensile load, the maximum stress position of the composite connecting rod is always on the tensile fiber, and under the same conditions, the composite connecting rod according to the present invention can withstand a larger maximum tensile load than the connecting rod of the prior art.

[0099] Optimal geometric properties and material properties of the compression composite can also be considered. Bending strength (i.e., compressive capacity) is typically determined by bending stiffness and maximum bending stress. If the material mass is constant, i.e., corresponding to a compression-resistant hollow fiber column with a constant cross-sectional area, its diameter will affect its bending strength. For the maximum bending stress, we have:

[0100]

[0101] Where, σ max is the maximum bending stress, M is the bending moment, c is the distance from the neutral axis, and I is the moment of inertia of the section.

[0102] For a constant cross section A0, assuming the ratio of the inner and outer diameters is k = D / d, we can obtain:

[0103]

[0104] It is evident that the magnitude of the moment of inertia I is related to the ratio of the inner to outer diameter, k. Therefore, by selecting a compression-resistant fiber with a suitable ratio of inner to outer diameter, k, a compression-resistant composite material with an appropriate maximum bending stress can be obtained.

[0105] In this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, structure, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, structure, or apparatus. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, structure, or apparatus that includes said element.

[0106] The description of the invention is given for illustrative and descriptive purposes only and is not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A composite connecting rod comprising a metal rod member and a composite material, characterized in that, The composite connecting rod is formed with an inner cavity, and the composite material comprises an axial composite material and a compression-resistant composite material, wherein the compression-resistant composite material is arranged in the inner cavity, and the axial composite material is wound around the metal rod member and wound outside the compression-resistant composite material; the composite connecting rod comprises a load-bearing rod arranged in the inner cavity, and enlarged portions are arranged at both ends of the load-bearing rod and located outside the inner cavity; the axial composite material is wound around the enlarged portions at both ends; and the axial composite material and the enlarged portions at both ends form the inner cavity.

2. The composite connecting rod of claim 1, wherein The compression-resistant composite material is wrapped around the load-bearing rod.

3. The composite connecting rod of claim 2, wherein The compression-resistant composite material is spirally wound around the load-bearing rod.

4. The composite connecting rod of claim 1, wherein The metal rod member comprises two sub rod members and two connecting portions connecting the two sub rod members, and the two sub rod members and the two connecting portions enclose the inner cavity.

5. The composite connecting rod of claim 1 wherein, The compression-resistant composite material is a composite material laminate.

6. The composite connecting rod of claim 1, wherein The metal rod member is made of titanium alloy.

7. The composite connecting rod of claim 1 wherein, The axial composite material is carbon fiber.

8. The composite connecting rod of claim 1 wherein, The end of the composite connecting rod is configured with a lug.

9. The composite connecting rod of claim 1 wherein, The metal rod member and the composite material in the composite connecting rod are not connected by fasteners.

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