Composite material longitudinal wall structure
By designing a composite material longitudinal wall structure and using different film-coated surfaces to apply pressure to form a continuous structure, the problem of discontinuous force transmission was solved, and the structure achieved efficient continuous load transfer and weight reduction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
- Filing Date
- 2023-09-26
- Publication Date
- 2026-05-19
AI Technical Summary
When the cross-sectional requirements of the longitudinal wall in a traditional composite material structure change at different locations, it leads to discontinuous force transmission and structural discontinuity, and secondary connections increase weight.
The composite material longitudinal wall structure design includes longitudinal facade, upper transverse facade, first lower transverse facade and second lower transverse facade. By applying pressure to different film surfaces, a continuous structure is formed, which can achieve free conversion between C-shaped and J-shaped cross sections.
This achieves efficient continuous load transfer and weight reduction in the structure.
Smart Images
Figure CN117087852B_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of aircraft structural design technology, and specifically relates to a composite material longitudinal wall structure. Background Technology
[0002] In order to achieve the continuity and layability of a single layer, the longitudinal walls of traditional composite material structures are basically in the form of J-shaped or C-shaped sections. When different parts of the same longitudinal wall have different section requirements, the relevant longitudinal wall structure is usually cut off at the section separation surface. Without secondary connection, the relevant structure is discontinuous, which leads to discontinuous force transmission. If secondary connection is performed, the overall weight of the structure will increase to a certain extent. Summary of the Invention
[0003] To address the aforementioned issues, this application provides a composite material longitudinal wall structure, thereby improving the continuity of force transmission and reducing unnecessary additional weight.
[0004] The composite material longitudinal wall structure of this application mainly includes a longitudinal elevation, an upper transverse elevation extending in a first direction at the top of the longitudinal elevation, a first lower transverse elevation extending in a first direction at the bottom of the longitudinal elevation, and a second lower transverse elevation extending in a second direction from the end to the section cutting point at the bottom of the longitudinal elevation, wherein the first direction is opposite to the second direction.
[0005] The longitudinal facade, upper horizontal facade, and part of the first lower horizontal facade are formed by pressing a first film surface with a C-shaped cross-section. The remaining parts of the longitudinal facade, upper horizontal facade, and first lower horizontal facade, as well as the second lower horizontal facade, are formed by pressing a second film surface. The second film surface includes a longitudinal facade film surface for pressing to form the longitudinal facade, an upper horizontal facade film surface for pressing to form the upper horizontal facade, a second lower horizontal facade film surface that bends toward the second lower horizontal facade from the first side of the cross-section cut, and a first lower horizontal facade film surface that bends toward the first lower horizontal facade from the second side of the cross-section cut. The first lower horizontal facade film surface also has an upper pressing film surface that extends to the first side of the cross-section cut, and part of the upper pressing film surface is located below the second lower horizontal facade film.
[0006] Preferably, the longitudinal elevation forms the web of the composite longitudinal wall structure, the upper transverse elevation forms the upper edge strip of the composite longitudinal wall structure, and the first lower transverse elevation and the second lower transverse elevation form the lower edge strip of the composite longitudinal wall structure.
[0007] Preferably, the first lower horizontal film-applying surface forms a first pressure surface from top to bottom, and the upper pressure film-applying surface forms a second pressure surface from bottom to top.
[0008] Preferably, the first film-applying surface and the second film-applying surface each form a pressure-applying surface that applies pressure to each other at a vertical position.
[0009] Preferably, the section cut is located at the middle position of the bottom end of the longitudinal surface.
[0010] This application can ensure efficient and continuous load transfer in the relevant structure, thereby enabling weight reduction of the corresponding structure. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of a preferred embodiment of the composite material longitudinal wall structure of this application.
[0012] Figure 2 This application Figure 1 A schematic diagram of the first film surface structure in the embodiment shown.
[0013] Figure 3 This application Figure 1 A schematic diagram of the second film surface structure in the embodiment shown.
[0014] Among them, 1-longitudinal elevation, 11-section cutting point, 2-upper horizontal elevation, 3-first lower horizontal elevation, 4-second lower horizontal elevation, 5-second film-applying surface, 51-longitudinal elevation film-applying surface, 52-upper horizontal elevation film-applying surface, 53-second lower horizontal elevation film-applying surface, 54-first lower horizontal elevation film-applying surface, 55-upper pressure film-applying surface, 6-first film-applying surface. Detailed Implementation
[0015] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, not all, of the embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.
[0016] This application provides a composite material longitudinal wall structure, such as Figures 1-3 As shown, it mainly includes a longitudinal elevation 1, an upper horizontal elevation 2 that extends in a first direction at the top of the longitudinal elevation 1, a first lower horizontal elevation 3 that extends in a first direction at the bottom of the longitudinal elevation 1, and a second lower horizontal elevation 4 that extends in a second direction from the end to the section cutting point 11 at the bottom of the longitudinal elevation 1, wherein the first direction is opposite to the second direction.
[0017] The longitudinal elevation 1, the upper horizontal elevation 2, and the first lower horizontal elevation 3 are partially formed by pressing a first film-coating surface 6 with a C-shaped cross-section. The remaining portions of the longitudinal elevation 1, the upper horizontal elevation 2, and the first lower horizontal elevation 3, as well as the second lower horizontal elevation 4, are formed by pressing a second film-coating surface 5. The second film-coating surface includes a longitudinal elevation film-coating surface 51 for pressing to form the longitudinal elevation 1, an upper horizontal elevation film-coating surface 52 for pressing to form the upper horizontal elevation 2, a second lower horizontal elevation film-coating surface 53 that bends toward the second lower horizontal elevation 4 from the first side of the cross-section cutting point 11, and a first lower horizontal elevation film-coating surface 54 that bends toward the first lower horizontal elevation 3 from the second side of the cross-section cutting point 11. The first lower horizontal elevation film-coating surface 54 also has an upper pressing film-coating surface 55 that extends to the first side of the cross-section cutting point 11, and a portion of the upper pressing film-coating surface 55 is located below the second lower horizontal elevation film-coating surface 53.
[0018] refer to Figure 2 and Figure 3 The first film-coating surface 6 is a traditional C-shaped cross-section film-coating surface, and the second film-coating surface 5 comprises two parts: a C-shaped cross-section and a Z-shaped cross-section. The C-shaped cross-section and the Z-shaped cross-section are in... Figure 1 At the mid-section cutting point, the relevant prepreg is cut.
[0019] In some alternative embodiments, the longitudinal elevation forms the web of the composite longitudinal wall structure, the upper transverse elevation 2 forms the upper edge strip of the composite longitudinal wall structure, and the first lower transverse elevation 3 and the second lower transverse elevation 4 form the lower edge strip of the composite longitudinal wall structure.
[0020] In some alternative embodiments, the first lower horizontal film-applying surface 54 forms a first pressure-applying surface from top to bottom, and the upper pressure-applying surface 55 forms a second pressure-applying surface from bottom to top. For example... Figure 3 As shown, the second film-applying surface 5 includes three independent pressure surfaces, as indicated by the arrows. The first pressure surface is used to apply pressure to the web, upper edge strip, and J-shaped edge strip. The second pressure surface is used to apply pressure to the lower edge strip. In addition, it also has a transverse pressure surface, which applies pressure to the longitudinal surface.
[0021] In some alternative embodiments, the first film-applying surface 6 and the second film-applying surface 5 respectively form pressure-applying surfaces that press against each other at the vertical plane position.
[0022] In some alternative embodiments, the section cutting point 11 is located at the middle position of the bottom end of the longitudinal elevation 1. In alternative embodiments, the specific position of the section cutting point 11 is designed according to the width of the second lower transverse elevation.
[0023] With the above configuration and membrane surface design, not only can structural continuity be achieved, but also continuous layup. Compared with traditional composite longitudinal walls, this application can achieve free conversion between C-shaped and J-shaped sections, ensuring efficient and continuous load transfer in the relevant structure, thereby achieving weight reduction in the corresponding structure.
[0024] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A composite material longitudinal wall structure, characterized in that, include: The longitudinal elevation (1), the upper horizontal elevation (2) which extends in a first direction at the top of the longitudinal elevation (1), the first lower horizontal elevation (3) which extends in a first direction at the bottom of the longitudinal elevation (1), and the second lower horizontal elevation (4) which extends in a second direction from the end to the section cutting point (11) at the bottom of the longitudinal elevation (1), wherein the first direction is opposite to the second direction. The longitudinal elevation (1), the upper horizontal elevation (2), and the first lower horizontal elevation (3) are partially formed by pressing a first film-coating surface (6) with a C-shaped cross-section; the remaining parts of the longitudinal elevation (1), the upper horizontal elevation (2), and the first lower horizontal elevation (3), as well as the second lower horizontal elevation (4), are formed by pressing a second film-coating surface (5). The second film-coating surface includes a longitudinal elevation film-coating surface (51) for pressing to form the longitudinal elevation (1) and an upper horizontal elevation film-coating surface (52) for pressing to form the upper horizontal elevation (2). 2) A second lower horizontal surface film-coating surface (53) that bends toward the second lower horizontal surface (4) on the first side of the section cut (11), and a first lower horizontal surface film-coating surface (54) that bends toward the first lower horizontal surface (3) on the second side of the section cut (11), wherein the first lower horizontal surface film-coating surface (54) also has an upper pressing film-coating surface (55) that extends to the first side of the section cut (11), and a portion of the upper pressing film-coating surface (55) is located below the second lower horizontal surface film-coating surface (53).
2. The composite material longitudinal wall structure as described in claim 1, characterized in that, The longitudinal elevation forms the web of the composite longitudinal wall structure, the upper transverse elevation (2) forms the upper edge strip of the composite longitudinal wall structure, and the first lower transverse elevation (3) and the second lower transverse elevation (4) form the lower edge strip of the composite longitudinal wall structure.
3. The composite material longitudinal wall structure as described in claim 1, characterized in that, The first lower horizontal film-applying surface (54) forms a first pressure surface from top to bottom, and the upper pressure film-applying surface (55) forms a second pressure surface from bottom to top.
4. The composite material longitudinal wall structure as described in claim 1, characterized in that, The first film-coating surface (6) and the second film-coating surface (5) respectively form pressure-pressing surfaces that press against each other at the vertical position.
5. The composite material longitudinal wall structure as described in claim 1, characterized in that, The section cut (11) is located at the middle position of the bottom end of the longitudinal surface (1).