CN112406131A - U-shaped co-curing stringer, stiffened wall plate and forming method thereof - Google Patents
U-shaped co-curing stringer, stiffened wall plate and forming method thereof Download PDFInfo
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- CN112406131A CN112406131A CN202011190198.6A CN202011190198A CN112406131A CN 112406131 A CN112406131 A CN 112406131A CN 202011190198 A CN202011190198 A CN 202011190198A CN 112406131 A CN112406131 A CN 112406131A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
- B29C70/545—Perforating, cutting or machining during or after moulding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
- B29L2031/3076—Aircrafts
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/40—Weight reduction
Abstract
The invention provides a U-shaped co-curing stringer, a stiffened wall plate and a forming method thereof, wherein the forming method comprises the following steps: step 1: paving and pasting the outer surface of the skin, wherein the paving layer of the whole outer surface of the skin is continuous; step 2: paving a stringer web plate including the R area and stringer web plate edge strips by using a mould, wherein the stringer web plate is not segmented; and step 3: segmenting the stringer web, and shearing to form a stringer cut-off end configuration end; and 4, step 4: cutting off the joint of the end of the stringer web and the stringer web edge; and 5: optionally adding intercalation and twill strips between the webs to increase strength; step 6: the skin is combined and co-cured with stringer webs, stringer flanges, inserts and twister structures. The invention has a fixed end bevel angle and does not extend to the skin, but ends when the stringer web still has a certain height. So that the stringer ends and the rib strips are staggered with respect to one another. The joint of the end head and the skin of the structure has better smoothness and aesthetic property, and the structure is more reasonable.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of aviation manufacturing, in particular to a U-shaped co-curing stringer, a stiffened wall plate and a forming method thereof.
[ background of the invention ]
In modern airplanes, wings, empennages (horizontal vertical tails), control surfaces (elevators and rudders) and other parts are widely in a composite material stiffened wall plate structure. The wings and empennage mainly adopt the structural configurations of stringers and ribs. Where the stringers are generally continuous stringers, the ribs have corresponding gaps at stringer stations for stringer passage. Meanwhile, the invention is different from the common T-shaped sectional long truss and adopts the U-shaped sectional long truss. The U-shaped stringer wallboard structure is used as a novel reinforced wallboard structure, the bottom laying layer of the stringer is completely attached to the skin, the bonding area far larger than that of the T-shaped stringer reinforced wallboard is obtained, the problem that the whole wallboard structure is influenced due to degumming of the stringer is effectively avoided, and the whole curing molding of the wallboard structure can be completed by adopting a co-curing or co-bonding process.
Compared with a stringer end patent WO201121340(A1) of airbus company, the segmented stringer applied by airbus is in a T-shaped stringer, and the gluing area of skin and the stringer is small. The stringer is connected to the skin with fasteners.
Compared with the boeing stringer end patent US10308344(B2), the boeing uses a cross-section stringer, and the bonding area between the stringer web and the skin is smaller like the T-shaped stringer. The end bevel angle is not fixed, the whole is a curve, and meanwhile, the height of the stringer web is reduced to the edge strip of the stringer web.
Another boeing patent, EP3173224(B1), uses a U-shaped stringer design with a fixed end chamfer. But the stringer web height decreases linearly to eventually be integral with the stringer web flange. There is no significant cutoff height.
Accordingly, there is a need to develop a U-shaped co-cured stringer, a stiffened panel, and methods of forming the same that address the deficiencies of the prior art and to address or mitigate one or more of the problems set forth above.
[ summary of the invention ]
In view of the above, the present invention provides a U-shaped co-cured stringer, stiffened panel, and method of forming the same, having a fixed end bevel, and not extending to the skin, but terminating when the stringer web is still at a certain height. So that the stringer ends and the rib strips are staggered with respect to one another. The joint of the end head and the skin of the structure has better smoothness and aesthetic property, and the structure is more reasonable.
In one aspect, the invention provides a method for forming a U-shaped co-cured stringer stiffened panel, comprising the steps of:
step 1: paving and pasting the outer surface of the skin, wherein the paving layer of the whole outer surface of the skin is continuous;
step 2: paving a stringer web plate including the R area and stringer web plate edge strips by using a mould, wherein the stringer web plate is not segmented;
and step 3: segmenting the stringer web, and shearing to form an end head;
and 4, step 4: cutting off the joint of the end of the stringer web and the stringer web edge;
and 5: optionally adding intercalation and twill strips between the webs to increase the strength;
step 6: and (3) combining and co-curing the skin formed in the step (1) to (5) with the stringer web, the stringer edge strip, the insertion layer and the twister strip structure to form the final U-shaped segmented stringer stiffened wallboard.
The above aspect and any possible implementation further provide an implementation, and after the joint is cut in step 4, the bead is laid flat against the panel skin.
There is further provided in accordance with any one of the possible implementations of the above-described aspect, an implementation in which the flanges on both sides of the stringer web are in the form of a continuous lay across the ribs.
The above-described aspects and any possible implementations further provide a U-shaped co-cured stringer including a first stringer, a second stringer, and a stringer web flange, the terminating end configuration of the first stringer and the terminating end configuration of the second stringer each connected by the stringer web flange.
The above aspect and any possible implementation further provide an implementation in which the first and second stringers each include a cut-off end configuration and two stringer webs, the first and second stringers being symmetrically disposed about the cut-off end configuration, the cut-off end configuration including an insertion layer disposed between two adjacent stringer webs and a twister strip disposed between the insertion layer and the two stringer webs.
The above-described aspects and any possible implementations further provide a U-shaped co-cured stringer stiffened panel including a plurality of U-shaped co-cured stringers and a panel skin, the plurality of U-shaped co-cured stringers being disposed in parallel on the panel skin.
There is further provided in accordance with the above aspect and any possible implementation form, a U-shaped co-cured stringer stiffened panel further comprising a panel skin inner profile disposed below the rib strips of the first and second stringers for rib strip standing of the first and second stringers, the stringer web strips being a component of the panel skin inner profile, the panel skin inner profile and the stringers both being disposed on the same side of the panel skin.
There is further provided in accordance with any one of the above aspects and possible implementations an implementation in which the U-shaped co-cured stringer stiffened panel further includes an R-zone disposed between the skin inner profile and the stringer web for transitioning between the skin inner profile and the stringer web.
The above-described aspects and any possible implementations further provide an implementation in which the panel skin is provided with a chamfer at the cutoff end configuration, the chamfer transitioning linearly with stringer web height.
The above aspects and any possible implementations further provide a stringer cut-off end configuration at a cut-off end of a stringer comprised of two stringer webs, the cut-off end configuration including an insertion layer disposed between two adjacent stringer webs and a twister strip disposed between the insertion layer and the two stringer webs.
Compared with the prior art, the invention can obtain the following technical effects:
1) the segmented stringer structure ensures the continuity of force transmission in the direction of the rib edge strip, and is suitable for an aircraft structure with the main force bearing direction of a wallboard in the rib (vertical stringer) direction;
2) the performance of the cut-off end of the U-shaped sectional stringer is superior to that of the T-shaped stringer, the bonding area of a bottom layer of the stringer and a skin is large, and debonding is not easy to occur;
3) the forming mode ensures the continuity of the U-shaped stringer laying layer to the maximum extent at the stringer ending position and has good mechanical property.
Of course, it is not necessary for any one product in which the invention is practiced to achieve all of the above-described technical effects simultaneously.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic view of a typical full-scale U-shaped co-cured segmented stringer stiffened panel of the background of the present invention;
FIG. 2 is a block diagram of a U-shaped co-cured stringer stiffened panel according to one embodiment of the present invention;
FIG. 3 is an exploded view of a U-shaped co-cured stringer stiffened panel according to one embodiment of the present invention;
FIG. 4 is a side view of a U-shaped co-cured stringer stiffened panel according to one embodiment of the present invention;
FIG. 5 is a schematic view of a stringer cutoff end adjacent to a stringer web bead junction provided by an embodiment of the present invention;
FIG. 6 is a schematic diagram of a twister strip and an intercalated paving provided by one embodiment of the present invention;
FIG. 7 is a schematic view of a stringer cut-off end and stringer web bead junction provided by an embodiment of the present invention;
FIG. 8 is a state diagram of a stringer web being sectioned and sheared according to one embodiment of the present invention;
FIG. 9 is a schematic view of a junction of two stringer cut ends and a stringer web bead provided in accordance with an embodiment of the present invention;
fig. 10 is a complete block diagram of a U-shaped co-cured stringer stiffened panel according to one embodiment of the present invention;
FIG. 11 is a flow chart of a method of forming according to one embodiment of the present invention.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The invention also provides a U-shaped co-cured stringer, which comprises a first stringer, a second stringer and stringer web flanges, wherein the cut-off end configuration of the first stringer and the cut-off end configuration of the second stringer are connected through the stringer web flanges. The first and second stringers each include a cut-off end configuration and two stringer webs, the cut-off end configuration being located at a cut-off end of a stringer comprised of the two stringer webs. The first stringer and the second stringer are symmetrically arranged by taking a cut-off end configuration as a center, the cut-off end configuration comprises an insertion layer and a twiddle strip, the insertion layer is arranged between two adjacent stringer webs, and the twiddle strip is arranged between the insertion layer and the two stringer webs.
The invention also provides a U-shaped co-curing stringer stiffened wallboard, which comprises a plurality of U-shaped co-curing stringers, a wallboard skin inner molded surface and a wallboard skin, wherein the U-shaped co-curing stringers are arranged on the wallboard skin in parallel. The U-shaped co-curing stringer stiffened wallboard further comprises a wallboard skin inner profile, the wallboard skin inner profile is arranged below the rib edge strips of the first stringer and the second stringer and used for the rib edge strip standing position of the first stringer and the second stringer, the stringer web edge strip is a component of the wallboard skin inner profile, and the wallboard skin inner profile and the stringer are arranged on the same side of the wallboard skin. The U-shaped co-curing stringer stiffened wall panel further comprises an R area, wherein the R area is arranged between the inner skin profile and the stringer web and used for transition between the inner skin profile and the stringer web, the stringer is provided with a bevel angle at a stop end configuration position, and the bevel angle is in linear transition along with the height of the stringer web.
A method of forming a U-shaped co-cured stringer stiffened panel, as shown in fig. 11, the method comprising the steps of:
step 1: paving and pasting the outer surface of the skin, wherein the paving layer of the whole outer surface of the skin is continuous;
step 2: paving a stringer web plate including the R area and stringer web plate edge strips by using a mould, wherein the stringer web plate is not segmented;
and step 3: segmenting the stringer web, and shearing to form an end head;
and 4, step 4: cutting off the joint of the end of the stringer web and the stringer web edge;
and 5: optionally adding intercalation and twill strips between the webs to increase the strength;
step 6: and (3) combining and co-curing the skin formed in the step (1) to (5) with the stringer web, the stringer edge strip, the insertion layer and the twister strip structure to form the final U-shaped segmented stringer stiffened wallboard.
In the step 3, the height of the stringer web plate edge strip is reserved between the end heads of the stringer stop end structure, after the connecting part is cut off in the step 4, the edge strip is flatly attached to the wallboard skin, and the edge strips on two sides of the stringer web plate are in a cross-rib continuous paving mode.
As shown in fig. 1, typical full-size U-shaped co-cured segmented stringer stiffened panels are shown with 1 stringer and 2 panel skin (stringer tape). It can be seen from FIG. 1 that the stringer has several discontinuities for engagement with the continuous rib. A schematic of a typical block of the present invention after assembly and co-curing is shown in fig. 2, comprising two segmented stringers with 4 stringer ends (cut-off ends). An exploded view of the present invention is shown in fig. 3, where 3 is stringer end, 4 is stringer web insert, and 5 is skin profile (stringer tape). The side view of the invention is shown in fig. 4, where the R-zone 6 can be seen for the transition skin profile and stringer web. As can be seen from the side view, the lower edge strips of the stringer webs are always pressed against the skin. The web still has a certain height when the long purlin of segmentation ends. The end is a fixed bevel angle, and the height of the web plate is in linear transition (including an R area). The junction of the two stringer cut ends with the stringer web flanges is shown in FIG. 5, where it can be seen that the two stringer webs have a seam in between. This seam is the only ply discontinuity in the stringer web flange. The wallboard skin is a continuous complete lay-up. Extending to a stringer cutoff end, the cutoff end may comprise a stringer web, a tape, a stringer web insert, and a lay-up of twister strips.
FIG. 6 is a schematic view of twill strip and intercalated paving, wherein 7 is twill strip. The stringer webs may be directly attached to each other or twisted strips and intercalated layers may be added as reinforcement.
From an exploded view of the present invention, it can be seen in fig. 3. The typical box section forming mode of the U-shaped sectional stringer is as follows:
1. and paving the outer surface (2) of the skin, wherein the paving layer of the whole outer surface of the skin is continuous.
2. Using a mold, the stringer web and stringer web flanges are laid to include an R-region, where the stringer web is not segmented. As shown in fig. 7, where 8 is a mold.
3. And (4) segmenting the stringer web, and shearing to form an end head. A certain stringer web bead height remains between the ends as shown in fig. 8.
4. The joints of the stringer web ends and the stringer web flanges are cut open, so that the flanges can be flatly attached to the panel skin, as shown in fig. 9 and 10, and the inner profile (stringer flanges) attaching surface of the skin is continuously attached to the stringer web.
5. Optionally, intercalation and twill strips can be added between webs to increase strength
6. And combining and co-curing the skin formed in the step with structures such as a stringer web, a stringer flange strip, an insertion layer, a twister strip and the like to form the final U-shaped sectional stringer stiffened wallboard.
The invention is different from the common T-shaped. The I-shaped continuous stringer is a U-shaped sectional stringer. The cut-off ends are positioned at both sides of the rib standing position. In the stringer direction, the edge strips on two sides of the web are in a cross-rib continuous paving mode, and the middle part is assisted with an inserting layer and a twisting strip. The rib direction, the inner molded surface of the skin and the stringer web are continuously paved, and only the end contains paving layer discontinuity, so that the structural strength is ensured. Unlike the end configurations of the prior patents, the present invention has a fixed end chamfer angle and does not extend to the skin, but instead terminates when the stringer web is still high. The connection part of the end head and the skin of the structure has better flatness and aesthetic property. The structure is more reasonable because enough space is left for the rib strips, and the height and the strength of the stringer web are ensured at the same time.
The segmented stringer structure ensures the continuity of force transmission in the direction of the rib edge strip, and is suitable for an aircraft structure with the main bearing direction of the wallboard in the rib (vertical stringer) direction; the performance of the cut-off end of the U-shaped sectional stringer is superior to that of the T-shaped stringer, the bonding area of a bottom layer of the stringer and a skin is large, and debonding is not easy to occur; the forming mode of the invention is at the stop of the stringer, which ensures the continuity of the U-shaped stringer laying layer to the maximum extent and has good mechanical property.
The U-shaped co-cured stringer, stiffened panel and method of forming the same provided by the embodiments of the present application are described in detail above. The above description of the embodiments is only for the purpose of helping to understand the method of the present application and its core ideas; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
As used in the specification and claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect. The description which follows is a preferred embodiment of the present application, but is made for the purpose of illustrating the general principles of the application and not for the purpose of limiting the scope of the application. The protection scope of the present application shall be subject to the definitions of the appended claims.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a commodity or system that includes the element.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
The foregoing description shows and describes several preferred embodiments of the present application, but as aforementioned, it is to be understood that the application is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the application as described herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the application, which is to be protected by the claims appended hereto.
Claims (10)
1. A forming method of a U-shaped co-cured stringer stiffened wall panel is characterized by comprising the following steps:
step 1: paving and pasting the outer surface of the skin, wherein the paving layer of the whole outer surface of the skin is continuous;
step 2: paving a stringer web plate including the R area and stringer web plate edge strips by using a mould, wherein the stringer web plate is not segmented;
and step 3: segmenting the stringer web, and shearing to form a stringer cut-off end configuration end;
and 4, step 4: cutting off the joint of the end of the stringer web and the stringer web edge;
and 5: optionally adding intercalation and twill strips between the webs to increase strength;
step 6: and (3) combining and co-curing the skin formed in the step (1) to (5) with the stringer web, the stringer edge strip, the insertion layer and the twister strip structure to form the U-shaped co-cured stringer stiffened wallboard.
2. The molding process of claim 1, wherein in step 3, stringer web flange height is maintained between ends of the stringer cutoff end configuration.
3. The molding process of claim 1 wherein the bead is placed flat against the panel skin after the joint is cut in step 4.
4. The molding process of claim 1 wherein the flanges on either side of the stringer web are in the form of a continuous bridge.
5. A U-shaped co-cured stringer prepared by the method of any of claims 1-4, wherein the U-shaped co-cured stringer comprises a first stringer, a second stringer, and a stringer web flange, and wherein the terminating end configuration of the first stringer is connected to the terminating end configuration of the second stringer by the stringer web flange.
6. The U-shaped co-cured stringer of claim 5, wherein said first and second stringers each comprise a cut-off end configuration and two stringer webs, said first and second stringers being symmetrically disposed about said cut-off end configuration, said cut-off end configuration comprising an insertion layer disposed between two adjacent stringer webs and a twister strip disposed between said insertion layer and said two stringer webs.
7. A U-shaped co-cured stringer stiffened panel made by the method of any one of claims 1 to 4, wherein the stringer stiffened panel further comprises a panel skin, the plurality of U-shaped co-cured stringers being disposed in parallel on the panel skin.
8. The U-co-cured stringer stiffened panel of claim 7 further comprising a panel skin inner profile disposed below the rib of the first and second stringers for rib standing of the first and second stringers, the stringer web edge being an integral part of the panel skin inner profile, the panel skin inner profile and stringer both being disposed on the same side of the panel skin.
9. The U-shaped co-cured stringer stiffened panel of claim 7, further comprising an R-zone disposed between the skin inner profile and the stringer web for transitioning with the skin inner profile and the stringer web.
10. The U-shaped co-cured stringer stiffened panel of claim 7, wherein said stringer is provided with a chamfer at a stop end configuration, the chamfer transitioning linearly with stringer web height.
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| CN113859579A (en) * | 2021-10-27 | 2021-12-31 | 东北大学 | Airplane wing root connecting area test piece considering damage characteristics |
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| CN202358297U (en) * | 2011-11-01 | 2012-08-01 | 哈尔滨飞机工业集团有限责任公司 | Wall plate of airplane wing |
| US20160009355A1 (en) * | 2013-11-15 | 2016-01-14 | The Boeing Company | Low Stress Stiffener Runout in Pi Bonded Structure |
| US20190061906A1 (en) * | 2017-08-23 | 2019-02-28 | The Boeing Company | Co-cured spar and stringer center wing box |
| CN109592005A (en) * | 2018-11-07 | 2019-04-09 | 中国航空工业集团公司西安飞机设计研究所 | A kind of design method with notch composite material stringer |
| CN109606622A (en) * | 2018-11-07 | 2019-04-12 | 中国航空工业集团公司西安飞机设计研究所 | A kind of whole design method for being glued composite material active face Material Stiffened Panel |
| CN211441240U (en) * | 2019-11-20 | 2020-09-08 | 中国商用飞机有限责任公司北京民用飞机技术研究中心 | Combined material "U" type stringer wallboard integrated into one piece frock |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113859579A (en) * | 2021-10-27 | 2021-12-31 | 东北大学 | Airplane wing root connecting area test piece considering damage characteristics |
| CN113859579B (en) * | 2021-10-27 | 2024-01-26 | 东北大学 | Aircraft wing root connection area test piece considering damage characteristics |
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