Reinforced wallboard compression test piece

Abstract

The utility model belongs to the technical field of stiffened wallboards, and discloses a stiffened wallboard compression test piece which comprises a plurality of I-shaped stringers, a skin, a first reinforcing piece, a second reinforcing piece and an encapsulation piece. The I-shaped stringer comprises an upper flange, a lower flange and a web plate. The I-shaped stringers are arranged at equal intervals, the skin is attached to one sides of the lower flanges, and the I-shaped stringers and the skin form a stiffened wall plate. The stiffened wall plate comprises an examination section and a potting section. The first reinforcing piece is located on the side, facing the I-shaped stringer, of the skin at the potting section, and the two sides of the first reinforcing piece are connected with the two adjacent lower flanges correspondingly. The second reinforcer is positioned on one side, deviating from the I-shaped stringer, of the skin at the potting section; and the first reinforcer and the second reinforcer are inserted into the potting section. According to the stiffened wallboard compression test piece, test failure caused by advanced damage of the end part of the encapsulation section before instability or damage of the examination section in a compression test can be avoided, so that the stiffened wallboard compression test piece is suitable for the compression test of thicker stiffened wallboards.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of the reinforced wallboard, especially to a reinforced wallboard compression test piece. BACKGROUND

[0002] The reinforced wallboard of composite material has been widely applied to the aircraft body structure such as fuselage, wing box section and tail wing as a typical thin-walled structure. The reinforced wallboard of composite material should be designed with reasonable test piece for performance test such as compression test before use. The reinforced wallboard compression test piece should ensure that the test load is uniformly transmitted to the test area, and the free edge of the test piece skin is prevented from being unstable in advance, so as to obtain effective test results.

[0003] The reinforced wallboard compression test piece in the prior art, as shown in the specific Figure 1 The I-shaped stringer 100' and the skin 200' form the reinforced wallboard, the both ends of the reinforced wallboard are the pouring sealing sections, the end portions of the pouring sealing sections are inserted into the pouring sealing piece 300' for pouring sealing, and the middle portion is the test area. For the reinforced wallboard with small thickness (less than 3mm), the reinforced wallboard compression test piece generally has good effect and can achieve the test purpose. However, for the reinforced wallboard with thick thickness, the test piece is prone to be damaged at the end portion of the pouring sealing section before the instability or damage of the test area (the region in the middle of the rib) during loading, so that the real bearing capacity of the reinforced wallboard cannot be reflected, and the test fails.

[0004] Therefore, it is urgent to provide a reinforced wallboard compression test piece to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a reinforced wallboard compression test piece, which can avoid the test failure caused by the early damage of the end portion of the pouring sealing section before the instability or damage of the test area in the compression test, and thus the reinforced wallboard compression test piece is suitable for the compression test of the thick reinforced wallboard.

[0006] To achieve the purpose, the utility model adopts the following technical scheme:

[0007] The reinforced wallboard compression test piece comprises:

[0008] A plurality of I-shaped stringers, the I-shaped stringer comprises an upper flange, a lower flange and a web, the plurality of I-shaped stringers are arranged at equal intervals, the plurality of upper flanges and the plurality of lower flanges are respectively located in the same plane, and the plurality of webs are parallel to each other;

[0009] A skin is attached to one side of the plurality of lower flanges away from the web, and the plurality of stringers and the skin form a stiffened panel, the stiffened panel comprising a test section and a pouring section at both ends of the test section in a first direction, the first direction being the length direction of the stringer;

[0010] A first reinforcement is located at the side of the skin facing the stringer at the pouring section, and both sides of the first reinforcement are connected to two adjacent lower flanges, respectively;

[0011] A second reinforcement is located at the side of the skin away from the stringer at the pouring section;

[0012] A pouring member, and the pouring section, the first reinforcement and the second reinforcement are all inserted into the pouring member.

[0013] As an optional technical solution of the stiffened panel compression test piece, the first reinforcement comprises a first reinforcing sheet, the first reinforcing sheet is attached to the skin, and the thickness of the first reinforcing sheet is the same as the thickness of the lower flange.

[0014] As an optional technical solution of the stiffened panel compression test piece, the second reinforcement comprises a second reinforcing sheet, the second reinforcing sheet is attached to the skin, and the edge of the skin at the pouring section is flush with the second reinforcing sheet.

[0015] As an optional technical solution of the stiffened panel compression test piece, the second reinforcing sheet is provided with a chamfer angle towards one end of the test section in the first direction.

[0016] As an optional technical solution of the stiffened panel compression test piece, the chamfer angle is 15 degrees.

[0017] As an optional technical solution of the stiffened panel compression test piece, the dimensions of the upper flange, the lower flange and the skin in the pouring section in a second direction are all larger than the dimensions of the upper flange, the lower flange and the skin in the test section in the second direction, the second direction being the width direction of the stringer.

[0018] As an optional technical solution of the stiffened panel compression test piece, the pouring section parts of the upper flange, the lower flange and the skin and the test section parts are all connected through a circular arc transition.

[0019] As an optional technical solution of the stiffened panel compression test piece, the stiffened panel compression test piece further comprises two reinforcing ribs, the test section is between the two reinforcing ribs, and the pouring section is outside the two reinforcing ribs, one end of the reinforcing rib is connected to an external clamp, and the other end of the reinforcing rib is connected to the upper flange and the skin.

[0020] As an optional technical scheme of the stiffened panel compression test piece, the reinforcing rib comprises a rib plate and a first L-shaped corner piece, the rib plate is arranged to extend along a second direction, and the rib plate is connected perpendicularly to one side of the upper flange away from the web, the first L-shaped corner piece is located between two adjacent I-beams, one half of the first L-shaped corner piece abuts against the skin, the other half of the first L-shaped corner piece is connected with the rib plate and is coplanar with the rib plate, and the second direction is a width direction of the I-beam.

[0021] As an optional technical scheme of the stiffened panel compression test piece, the stiffened panel compression test piece further comprises a second L-shaped corner piece, one half of the second L-shaped corner piece abuts against the rib plate, and the other half of the second L-shaped corner piece abuts against one side of the upper flange away from the web.

[0022] The beneficial effects of the utility model are as follows:

[0023] The stiffened panel compression test piece provided by the utility model comprises a plurality of I-beams, a skin, a first reinforcing piece, a second reinforcing piece and a pouring sealing piece. The plurality of I-beams and the skin form a stiffened panel, and the stiffened panel comprises an evaluation section and a pouring sealing section. The first reinforcing piece is located at the pouring sealing section and is connected to two adjacent lower flanges on the two sides, the second reinforcing piece is located at the pouring sealing section on one side of the skin away from the I-beam, and the pouring sealing section, the first reinforcing piece and the second reinforcing piece are all inserted into the pouring sealing piece. The first reinforcing piece can increase the connecting strength between the end portions of the pouring sealing section of the I-beam, the second reinforcing piece can increase the structural strength of the end portion of the pouring sealing section of the skin, the first reinforcing piece and the second reinforcing piece together increase the structural strength of the end portion of the pouring sealing section of the stiffened panel, so that the test failure caused by the early damage of the end portion of the pouring sealing section before the evaluation section loses stability or is damaged in the compression test can be avoided, and the stiffened panel compression test piece is suitable for the compression test of a relatively thick stiffened panel. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a structural schematic view of a stiffened panel compression test piece in the background art;

[0025] Figure 2 It is a structural schematic view of a stiffened panel compression test piece provided by an embodiment of the utility model;

[0026] Figure 3 It is an exploded view of a stiffened panel compression test piece provided by an embodiment of the utility model;

[0027] Figure 4 It is a structural schematic view of an I-beam provided by an embodiment of the utility model;

[0028] Figure 5It is the structure schematic view of the skin provided by the embodiment of the utility model;

[0029] Figure 6 It is the local schematic view of the assembly of the reinforced wallboard, the first reinforcing sheet and the second reinforcing sheet provided by the embodiment of the utility model;

[0030] Figure 7 It is the assembly view of the skin and the second reinforcing sheet provided by the embodiment of the utility model.

[0031] In the drawing,

[0032] 100', I-shaped stringer; 200', skin; 300', potting element;

[0033] 100, I-shaped stringer; 200, skin; 300, first reinforcing element; 400, second reinforcing element; 500, potting element; 600, reinforcing rib; 700, second L-shaped corner sheet. DETAILED DESCRIPTION

[0034] The utility model will be further explained in detail in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, and not limit the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawing, not all structures.

[0035] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0036] In the utility model, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature in the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature in the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature in the second feature include that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0037] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0038] This embodiment provides a stiffened wall panel compression test specimen. This stiffened wall panel compression test specimen can avoid premature failure of the end of the potting section before the test section becomes unstable or before failure, which would lead to test failure. Therefore, this stiffened wall panel compression test specimen is suitable for compression tests of thicker stiffened wall panels.

[0039] Specifically, such as Figures 2 to 5 As shown, the stiffened wall panel compression test specimen includes multiple I-beams 100, a skin 200, a first reinforcing member 300, a second reinforcing member 400, and a potting compound 500. Exemplarily, the number of I-beams 100 can be two, three, four, or six, etc. In this embodiment, the number of I-beams 100 is five. Each I-beam 100 includes an upper flange, a lower flange, and a web. The multiple I-beams 100 are arranged at equal intervals, such that the multiple upper flanges and multiple lower flanges are respectively in the same plane, the multiple webs are parallel to each other, and the ends of the multiple I-beams 100 are flush along their length. The skin 200 is attached to the side of the multiple lower flanges facing away from the web, and the edges of the skin 200 are flush with the edges of the lower flanges. The multiple I-beams 100 and the skin 200 form a stiffened wall panel. The stiffened wall panel includes a test section and potting compounds located at both ends of the test section along a first direction, where the first direction is the length direction of the I-beams 100. The first reinforcing member 300 is located on the side of the skin 200 at the potting section facing the I-shaped stringer 100, and the two sides of the first reinforcing member 300 are respectively connected to two adjacent lower flanges. The second reinforcing member 400 is located on the side of the skin 200 at the potting section away from the I-shaped stringer 100; the potting section, the first reinforcing member 300 and the second reinforcing member 400 are all inserted into the potting member 500.

[0040] Based on the above design, the plurality of I-beam stringers 100 and the skin 200 form a stiffened wallboard, which includes a test section and a pouring section. The first reinforcing member 300 is located at the pouring section and connected to the adjacent two lower flanges on both sides, respectively, and the second reinforcing member 400 is located at the pouring section of the skin 200 away from the I-beam stringer 100. The pouring section, the first reinforcing member 300 and the second reinforcing member 400 are all inserted into the pouring member 500. The first reinforcing member 300 can increase the connection strength between the end portions of the I-beam stringer 100 at the pouring section, and the second reinforcing member 400 can increase the structural strength of the end portion of the skin 200 at the pouring section. The first reinforcing member 300 and the second reinforcing member 400 together increase the structural strength of the end portion of the pouring section of the stiffened wallboard, which can avoid the end portion of the pouring section from being damaged in advance before the test section loses stability or is damaged in the compression test, thereby making the stiffened wallboard compression test piece suitable for the compression test of a relatively thick stiffened wallboard.

[0041] It should be noted that the two ends along the first direction are provided with the first reinforcing member 300 and the second reinforcing member 400.

[0042] Optionally, as shown in Figure 6 The first reinforcing member 300 includes a first reinforcing sheet, which is attached to the skin 200, and the thickness of the first reinforcing sheet is the same as that of the lower flange, i.e., the first reinforcing sheet and the plurality of lower flanges are in the same plane, which is beneficial to the flatness of the stiffened wallboard and also increases the connection strength of the end portion of the lower flange and the end portion of the skin 200.

[0043] In the embodiment, the side wall of the first reinforcing sheet is glued to the side wall of the two lower flanges, and the side surface of the first reinforcing sheet away from the web is glued to the skin 200. The edge of the first reinforcing sheet along the first direction is flush with the edge of the plurality of lower flanges, and the first reinforcing sheet is completely placed in the pouring member 500.

[0044] Optionally, as shown in Figure 7 The second reinforcing member 400 includes a second reinforcing sheet, which is attached to the skin 200 and flush with the edge of the skin 200 at the pouring section, and the second reinforcing member can ensure the flatness of the skin 200.

[0045] Further, one end of the second reinforcing sheet toward the test section extends beyond the opening of the pouring member 500 along the first direction, which increases the contact area of the second reinforcing sheet with the skin 200 and improves the structural reinforcing effect on the skin 200.

[0046] Further, the second reinforcing sheet is provided with a chamfer angle at one end thereof along the first direction toward the test section, which allows the second reinforcing sheet to slowly transition with the skin 200.

[0047] In the embodiment, the chamfer angle is 15 degrees.

[0048] Optionally, continuing as shown inFigure 4 and Figure 5 As shown, the dimensions of the upper flange, lower flange, and skin 200 in the grouting section along the second direction are all larger than the dimensions of the parts in the test section along the second direction. The second direction is the width direction of the I-beam truss 100. By widening the dimensions of the upper flange, lower flange, and skin 200 grouting section (i.e., the ends of the upper flange, lower flange, and skin 200 along the first direction), the structural strength of the upper flange, lower flange, and skin 200 grouting section is increased, further avoiding premature failure of the grouting section ends before the test section becomes unstable or before failure during the compression test, which would lead to test failure.

[0049] Furthermore, the connection between the grouting sections of the upper flange, lower flange, and skin 200 and the test section is achieved through a rounded transition, allowing the widened grouting sections of the three parts to smoothly transition into the test section.

[0050] Taking the arc at the connection between the potting section and the test section of the skin 200 as an example, its arc radius R is 150mm, and the angle between the arc and the end of the test section and the potting section is 30 degrees.

[0051] Optionally, continue as follows Figure 2 and Figure 3 As shown, the stiffened panel compression test specimen also includes two reinforcing ribs 600. The area between the two reinforcing ribs 600 is the test section, and the area outside the two reinforcing ribs 600 is the filling section. One end of the reinforcing rib 600 is connected to an external clamp, and the other end of the reinforcing rib 600 is connected to the upper flange and the skin 200. The reinforcing rib 600 divides the stiffened panel into the test section and the filling section, and improves the flatness of the stiffened panel test section.

[0052] Furthermore, the reinforcing rib 600 includes a rib plate and a first L-shaped corner piece. The rib plate extends along a second direction and is vertically connected to the side of multiple upper flanges away from the web plate. The first L-shaped corner piece is located between two adjacent I-beams 100. Half of the outer side of the first L-shaped corner piece abuts against the skin 200, and the other half of the first L-shaped corner piece is connected to the rib plate and is coplanar with the rib plate. The second direction is the width direction of the I-beam 100.

[0053] In this embodiment, the rib plate and the first L-shaped corner piece are integrally formed.

[0054] Furthermore, the stiffened wall panel compression test specimen also includes a second L-shaped corner piece 700, with one half of the outer side of the second L-shaped corner piece 700 abutting against the rib plate, and the other half of the outer side of the second L-shaped corner piece 700 abutting against the side of the upper flange away from the web plate, thereby increasing the connection strength between the reinforcing rib 600 and the upper flange.

[0055] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the present application. Here, it is not necessary and also impossible to enumerate all the implementation modes. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application claim.

Claims

1. A compression test piece of a stiffened wall panel, characterized by, The utility model relates to a kind of stiffened wallboard, which comprises: A plurality of I-beams (100) comprising upper flanges, lower flanges and webs, the plurality of I-beams (100) are equidistantly spaced, the plurality of upper flanges and the plurality of lower flanges are in the same plane respectively, and the plurality of webs are parallel to each other; A skin (200) attached to one side of the plurality of lower flanges away from the webs, the plurality of I-beams (100) and the skin (200) form a stiffened wallboard, the stiffened wallboard comprises a test section and a sealing section located at both ends of the test section along a first direction, and the first direction is the length direction of the I-beams (100); A first reinforcement (300) located at the sealing section on the side of the skin (200) facing the I-beams (100), and both sides of the first reinforcement (300) are connected to two adjacent lower flanges respectively; A second reinforcement (400) located at the sealing section on the side of the skin (200) away from the I-beams (100); A sealing member (500) in which the sealing section, the first reinforcement (300) and the second reinforcement (400) are inserted.

2. The stiffened wall panel compression test piece of claim 1, wherein, The first reinforcement (300) comprises a first reinforcing sheet attached to the skin (200), and the thickness of the first reinforcing sheet is the same as the thickness of the lower flange.

3. The stiffened wall panel compression test piece of claim 1, wherein, The second reinforcement (400) comprises a second reinforcing sheet attached to the skin (200), and the edge of the second reinforcing sheet is flush with the edge of the skin (200) at the sealing section.

4. The stiffened wall panel compression test piece of claim 3, wherein, The second reinforcing sheet is provided with a chamfered angle towards one end of the test section along the first direction.

5. The stiffened wall panel compression test piece of claim 4, wherein, The chamfered angle is 15 degrees.

6. The stiffened wall panel compression test piece of claim 1 wherein, The upper flange, the lower flange and the skin (200) at the sealing section are larger in size along a second direction than those at the test section, and the second direction is the width direction of the I-beams (100).

7. The stiffened wall panel compression test piece of claim 6 wherein, The sealing section and the test section of the upper flange, the lower flange and the skin (200) are connected through a circular arc.

8. The stiffened wall panel compression test piece of claim 1 wherein, The stiffened wallboard compression test piece further comprises two reinforcing ribs (600), the reinforcing ribs (600) are located outside the test section, one end of the reinforcing rib (600) is connected to an external clamp, and the other end of the reinforcing rib (600) is connected to the upper flange and the skin (200).

9. The stiffened wall panel compression test piece of claim 8, wherein, The reinforcing rib (600) comprises a rib plate and a first L-shaped corner piece, the rib plate is arranged to extend along a second direction, and the rib plate is connected perpendicularly to one side of the upper flange away from the web, the first L-shaped corner piece is located between two adjacent I-beams (100), one half of the first L-shaped corner piece abuts the skin (200), the other half of the first L-shaped corner piece is connected with the rib plate and is coplanar with the rib plate, and the second direction is the width direction of the I-beam (100).

10. The stiffened wall panel compression test piece of claim 9, wherein, The stiffened wallboard compression test piece further comprises a second L-shaped corner piece (700), one half of the second L-shaped corner piece (700) abuts the rib plate, and the other half of the second L-shaped corner piece (700) abuts one side of the upper flange away from the web.

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