CN118269376A - Technological method for reducing solidification deformation of reinforced wallboard - Google Patents
Technological method for reducing solidification deformation of reinforced wallboard Download PDFInfo
- Publication number
- CN118269376A CN118269376A CN202410428510.2A CN202410428510A CN118269376A CN 118269376 A CN118269376 A CN 118269376A CN 202410428510 A CN202410428510 A CN 202410428510A CN 118269376 A CN118269376 A CN 118269376A
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- Prior art keywords
- skin
- deformation
- reducing
- reinforced wallboard
- stringer
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- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000007711 solidification Methods 0.000 title claims abstract description 14
- 230000008023 solidification Effects 0.000 title claims abstract description 14
- 238000005452 bending Methods 0.000 claims description 10
- 239000002131 composite material Substances 0.000 description 10
- 239000000835 fiber Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000001788 irregular Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
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- Load-Bearing And Curtain Walls (AREA)
Abstract
The invention discloses a process method for reducing curing deformation of a reinforced wallboard. The method adopts a reverse counteracting strategy to convert the skin into 2C-shaped structures with opposite orientations in the axial direction of the parallel stringers and the axial direction of the perpendicular stringers. And the solidification deformation of the reinforced wallboard is reversely counteracted through the rebound deformation of the C-shaped structure.
Description
Technical Field
The invention relates to the field of manufacturing of zero (component) parts of composite materials, in particular to a process method for reducing the solidification deformation of a reinforced wallboard.
Background
The composite material reinforced wallboard can greatly improve the bearing efficiency, simplify the assembly relation and is widely applied to the key parts of wings, tail wings and the like of an airplane.
The anisotropy of the composite material can cause deformation of the article after curing. The reinforced wallboard consists of a plurality of stringers and a skin, the layering structure is extremely complex, and irregular hyperbolic deformation can be generated after solidification.
The existing method mainly solves the problem of solidification deformation of the composite material workpiece through die repair compensation. And (3) mould shaping compensation, namely firstly predicting possible solidification deformation of the composite material workpiece, then reversely shaping the mould, and deforming the workpiece from a non-theoretical molded surface to a theoretical molded surface after solidification. The method can solve the solidification deformation of typical structures such as C-shaped beams and the like. However, for complex structures such as reinforced wall plates, the curing deformation of the complex structures cannot be estimated accurately, and a corresponding compensation model is built, so that the implementation effect is poor.
Therefore, a process method for reducing the curing deformation of the reinforced wallboard is urgently needed, complex and low-precision curing deformation pre-estimation calculation is avoided, and the establishment of a modified compensation curved surface is realized, so that the curing deformation of the reinforced wallboard is reliably and efficiently solved.
Disclosure of Invention
The invention discloses a process method for reducing curing deformation of a reinforced wallboard. The method is based on the curing deformation of a typical composite material structure, adopts a reverse counteracting strategy, converts the skin into 2C-shaped structures with opposite directions in the axial direction of the parallel stringers and the axial direction of the perpendicular stringers, and the rebound deformation of the C-shaped structures is counteracted with the curing deformation of the reinforced wallboard in a reverse way, so that the curing deformation of the reinforced wallboard is greatly reduced. The method utilizes the curing deformation of the typical structure to counter-offset the curing deformation of the reinforced wallboard, does not need to carry out complex calculation and profile establishment processes, and is simple and efficient.
A process for reducing the solidification deformation of reinforced wall plate features that the edges of the axial skin on two sides of parallel stringer are bent toward stringer, and the edges of the axial skin on two sides of vertical stringer are bent toward skin.
After the allowance of any end of the skin is bent, the included angle between the allowance and the skin is at least 70 degrees, and the fillet radius of the bending area is at least R3.
The allowance of any end of the skin is consistent with the skin layer of the area.
The height of the bending area of either end of the skin is at least 20mm.
The edges of the folded region of either end of the skin are spaced at least 15mm from the vertices of the same side skin margin.
The process method for reducing the curing deformation of the reinforced wallboard has the following advantages: 1) Is simple. Only the allowance of the skin end is required to be bent towards a specific direction, and complex estimation and modeling processes are not required; 2) Reliable. The skin is converted into 2C-shaped structures in opposite directions in the axial direction of the parallel stringers and the axial direction of the perpendicular stringers by adopting a reverse counteracting strategy, and the curing deformation of the reinforced wallboard is counteracted reversely through the rebound deformation of the skin; 3) Accurate. The original theoretical molded surface of the reinforced wallboard is not changed, and the curing deformation of the reinforced wallboard is reduced through the counteracting of the curing deformation of different typical structures in opposite directions.
Drawings
FIG. 1T-shaped stiffened wall panel schematic view
FIG. 2T-shaped reinforced wall panel margin schematic diagram
Figure 3 is a schematic view of the margin of an i-shaped reinforced wallboard
The numbering in the figures illustrates: the longitudinal girder comprises a 1-skin, a 2-T-shaped stringer, vertices of the rest of the 3-skin, 4-bending areas, the rest of the two side ends of the axial skin of the 5-parallel stringer, the rest of the two side ends of the axial skin of the 6-vertical stringer, edges of the 7-bending areas, fillets of the 8-bending areas and 9-I-shaped stringers.
Detailed Description
The structural composite material generally consists of fibers and resin, and the coefficients of thermal expansion of the fibers and the resin are different, that is, the expansion amount of the fibers at high temperature and the contraction amount of the fibers at normal temperature are not completely matched, so that after the composite material part is cured, internal stress exists, and deformation is generated.
For the C-type structure, the gradient distribution of the internal stress in the thickness direction causes rebound deformation.
For the stiffened panel, the stringers and skin each have a set deformation, which couples, creating a complex irregular hyperbolic deformation.
The mold repair compensation method is based on solidification deformation, and the working surface of the mold for molding the composite material workpiece is replaced by a non-theoretical surface. After curing, the composite part is deformed from the non-theoretical profile to the theoretical profile.
For the C-shaped structure, the die modification compensation method achieves good effects.
For complex structures such as reinforced wall plates, the application effect is poor because an accurate compensation model cannot be built.
The application abandons the mould repairing compensation method, skillfully utilizes the rebound deformation of the C-shaped structure in2 orthogonal directions, and reversely counteracts the solidification deformation of the reinforced wallboard.
As shown in fig. 1-3.
Example 1T-shaped reinforced wallboard
The application discloses a process method for reducing curing deformation of a reinforced wallboard, taking a T-shaped reinforced wallboard as an example.
The margins 5 of the two side ends of the parallel stringer axial skin are bent towards the direction of the T-shaped stringer 2, and the margins 6 of the two side ends of the perpendicular stringer axial skin are bent towards the direction of the skin 1.
After the allowance of any end of the skin is bent, the included angle between the allowance and the skin 1 is 90 degrees, and the radius of a fillet 8 of a bending area is R5.
The allowance of any end of the skin is consistent with the skin layer of the area.
The height of the bending region 4 at either end of the skin is 30mm.
The edge 7 of the folded region of either end of the skin is spaced 30mm from the apex 3 of the same side skin margin.
Example 2I-shaped reinforced wallboard
The application provides a process method for reducing the solidification deformation of an I-shaped reinforced wallboard.
The margins 5 of the two side ends of the parallel stringer axial skin are bent towards the direction of the I-shaped stringer 9, and the margins 6 of the two side ends of the perpendicular stringer axial skin are bent towards the direction of the skin 1.
After the allowance of any end of the skin is bent, the included angle between the allowance and the skin 1 is 80 degrees, and the radius of a fillet 8 of a bending area is R6.
The allowance of any end of the skin is consistent with the skin layer of the area.
The height of the bending region 4 at either end of the skin is 25mm.
The edge 7 of the folded region of either end of the skin is spaced 25mm from the apex 3 of the same side skin margin.
The foregoing description of the preferred embodiment of the invention is not intended to be limiting, but rather to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (5)
1. A process method for reducing the solidification deformation of a reinforced wallboard is characterized in that the margins of the two side ends of an axial skin of a parallel stringer are bent towards the direction of the stringer, and the margins of the two side ends of the axial skin of the perpendicular stringer are bent towards the direction of the skin.
2. The process for reducing the curing deformation of a stiffened panel according to claim 1, wherein after the remainder of either end of the skin is folded, the included angle with the skin is at least 70 °, and the corner radius of the folded region is at least R3.
3. A method of reducing cure distortion of a stiffened panel according to claim 1, wherein the margin at either end of the skin is consistent with the skin lay-up in the region.
4. A method of reducing cure distortion of a stiffened panel according to claim 1, wherein the height of the fold region at either end of the skin is at least 20mm.
5. A method of reducing cure distortion in a stiffened panel according to claim 1, wherein the edges of the bending region at either end of the skin are spaced at least 15mm from the apex of the skin margin on the same side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410428510.2A CN118269376A (en) | 2024-04-10 | 2024-04-10 | Technological method for reducing solidification deformation of reinforced wallboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410428510.2A CN118269376A (en) | 2024-04-10 | 2024-04-10 | Technological method for reducing solidification deformation of reinforced wallboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118269376A true CN118269376A (en) | 2024-07-02 |
Family
ID=91646630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410428510.2A Pending CN118269376A (en) | 2024-04-10 | 2024-04-10 | Technological method for reducing solidification deformation of reinforced wallboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118269376A (en) |
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2024
- 2024-04-10 CN CN202410428510.2A patent/CN118269376A/en active Pending
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