Composite material T-shaped rib bending torsion coupling loading test device

Abstract

The invention belongs to the field of structural strength tests, and particularly relates to a composite material T-shaped rib bending torsion coupling loading test device. The testing device comprises a testing machine chuck fixed end, a bending clamp supporting end assembly, a T-shaped rib test piece, a bending clamp loading end assembly, a testing machine chuck movable end and a torsion clamp assembly. Through structural design, simulation of a failure mechanism and a load transfer mechanism of the T-shaped rib test piece is realized, independent loading of a bending load applied to the T-shaped rib test piece can be realized, and meanwhile, a bending load and torsion load coupling loading technology is broken through; the composite material T-shaped rib test piece bending load and torsion load coupling loading device can realize bending load and torsion load coupling loading of a composite material T-shaped rib test piece, can realize loading of different bending / torsion load ratios, is reliable in test result, and ensures the accuracy of load application.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of structural strength test, and particularly relates to a composite T-shaped rib bending and torsion coupling loading test device. BACKGROUND

[0002] When the composite stiffened panel bears axial compression, shear and compression-shear combined load, the skin first buckles, and with the continuous increase of the load, the buckling deformation increases and even appears a variable wave phenomenon, when the deformation reaches a certain degree, the long string edge and the skin bonding interface begin to debond, and the panel gradually loses the bearing capacity with the further expansion of the interface debonding.

[0003] Due to the long production and development cycle, high cost and complex failure coupling of the full-size panel for carrying out the related failure research, aiming at the post-buckling structural deformation and load transmission mechanism of the composite stiffened panel, in order to reasonably represent the failure of the typical stiffened panel, the corresponding test is adopted to verify the simulation of the typical unit failure mechanism of the composite panel.

[0004] Therefore, there is an urgent need for a technical solution to overcome or alleviate at least one of the above-mentioned defects of the prior art. SUMMARY

[0005] The purpose of the application is to provide a composite T-shaped rib bending and torsion coupling loading test device to solve at least one problem existing in the prior art.

[0006] The technical scheme of the application is:

[0007] A composite T-shaped rib bending and torsion coupling loading test device, comprising:

[0008] A bending clamp support end assembly, the bending clamp support end assembly comprises a bending clamp support base and a bending clamp support chuck, the bending clamp support base is fixedly connected with a test machine chuck fixed end, and the bending clamp support chuck is fixedly connected with the bending clamp support base;

[0009] A bending clamp loading end assembly, the bending clamp loading end assembly comprises a bending clamp test machine connecting base, a bending clamp torque adjusting rod, a bending clamp torsion loading arm, a bending clamp support loading base and a bending clamp support loading block, one end of the bending clamp test machine connecting base is fixedly connected with a test machine chuck movable end, the other end of the bending clamp test machine connecting base is hingedly connected with the bending clamp torque adjusting rod and the bending clamp support loading base, and the bending clamp torsion loading arm is fixedly connected with the bending clamp torque adjusting rod;

[0010] A T-shaped rib test piece, which comprises a web portion and a rib portion, the web portion is positioned by the bending clamp support chuck, the rib portion is positioned by the bending clamp support loading base cooperating with the bending clamp support loading block;

[0011] A torsion clamp assembly, which comprises a torsion loading steel wire rope, a torsion loading dynamometer, a torsion support double ear and a torsion support base, the torsion support base is fixedly connected with a force-bearing floor, the torsion support double ear is installed on the torsion support base, the torsion loading dynamometer is connected with the torsion support double ear through the torsion loading steel wire rope, and the torsion loading steel wire rope is fixedly connected with the bending clamp torsion loading arm.

[0012] In at least one embodiment of the present application, the bending clamp support base comprises a first bending clamp support base portion and a second bending clamp support base portion, the first bending clamp support base portion is fixedly connected with the test machine chuck fixed end, and the second bending clamp support base portion is fixedly connected with the bending clamp support chuck.

[0013] In at least one embodiment of the present application, a guide groove is formed in the second bending clamp support base portion, and the torsion loading dynamometer is located in the guide groove.

[0014] In at least one embodiment of the present application, the bending clamp support chuck comprises two, the web portion of the T-shaped rib test piece is located between the two bending clamp support chucks, and the two bending clamp support chucks are connected by bolts to position the web portion.

[0015] In at least one embodiment of the present application, the bending clamp test machine connecting base comprises a first bending clamp test machine connecting base portion and a second bending clamp test machine connecting base portion, the first bending clamp test machine connecting base portion is fixedly connected with the test machine chuck movable end, the second bending clamp test machine connecting base portion is in a U shape, a plurality of connecting holes are formed in the second bending clamp test machine connecting base portion, and the second bending clamp test machine connecting base portion is hingedly connected with the bending clamp torque adjusting rod and the bending clamp support loading base.

[0016] In at least one embodiment of the present application, a plurality of connecting holes are formed in the bending clamp torque adjusting rod, and an installation groove is formed in the end of the bending clamp torque adjusting rod.

[0017] In at least one embodiment of the present application, the bending clamp torsion loading arm is in a circular arc shape, the bending clamp torsion loading arm is arranged in the installation groove of the bending clamp torque adjusting rod, and the bending clamp torsion loading arm is connected with the bending clamp torque adjusting rod by bolts.

[0018] In at least one embodiment of the present application, the bending clamp support loading base comprises a first bending clamp support loading base part and a second bending clamp support loading base part, the first bending clamp support loading base part is a double-ear structure, and the second bending clamp support loading base part is provided with a mounting boss matched with the bending clamp support loading block.

[0019] The present application has at least the following beneficial technical effects:

[0020] The composite T-stiffener bending-torsion coupling loading test device of the present application can accurately simulate the post-buckling dangerous structure details of the composite stiffened panel, so that it has the same failure mode, structural deformation and load transmission mechanism as the stiffened panel structure. The T-stiffener bending-torsion coupling loading test device for characterizing the interfacial debonding of the composite stiffened panel is designed, and different bending / torsion ratio loadings are realized. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a schematic diagram of the composite T-stiffener bending-torsion coupling loading test device of one embodiment of the present application as a whole;

[0022] Figure 2 is a schematic diagram of the bending clamp support base of one embodiment of the present application;

[0023] Figure 3 is a schematic diagram of the bending clamp support chuck of one embodiment of the present application;

[0024] Figure 4 is a schematic diagram of the bending clamp test machine connecting base of one embodiment of the present application;

[0025] Figure 5 is a schematic diagram of the bending clamp torque adjusting rod of one embodiment of the present application;

[0026] Figure 6 is a schematic diagram of the bending clamp torsion loading arm of one embodiment of the present application;

[0027] Figure 7 is a schematic diagram of the bending clamp support loading base of one embodiment of the present application;

[0028] Figure 8 is a schematic diagram of the bending clamp support loading block of one embodiment of the present application.

[0029] Wherein:

[0030] 1-Test machine clamp fixed end, 2-bending clamp support end assembly, 3-T-shaped rib test piece, 4-bending clamp loading end assembly, 5-test machine clamp movable end, 6-torsion clamp assembly, 201-bending clamp support base, 202-bending clamp support clamp, 401-bending clamp test machine connecting base, 402-bending clamp torque adjusting rod, 403-bending clamp torsion loading arm, 404-bending clamp support loading base, 405-bending clamp support loading block, 601-torsion loading steel wire rope, 602-torsion loading load cell, 603-steel wire rope connecting double ears, 604-torsion support base. DETAILED DESCRIPTION

[0031] To make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the drawings in the embodiments of the present application. Identical or similar labels in the drawings represent identical or similar elements or elements with identical or similar functions throughout. The described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation on the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application. The embodiments of the present application will be described in detail below with reference to the drawings.

[0032] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the scope of protection of the present application.

[0033] The embodiments of the present application will be described in detail below with reference to the drawings. Figures 1 to 8 The present application will be described in further detail.

[0034] The present application provides a composite T-shaped rib bending and torsion coupling loading test device, comprising: a test machine clamp fixed end 1, a bending clamp support end assembly 2, a T-shaped rib test piece 3, a bending clamp loading end assembly 4, a test machine clamp movable end 5, and a torsion clamp assembly 6.

[0035] Specifically, as shown in FIG. 1, the bending clamp support end assembly 2 is connected to the test machine clamp fixed end 1, and the bending clamp loading end assembly 4 is connected to the test machine clamp movable end 5. Figure 1As shown, the test machine chuck fixed end 1 is connected to the bending clamp support end assembly 2 by bolts, the bending clamp support end assembly 2 generates compression force by bolt connection, and the support of the T-shaped rib test piece is realized. The bending clamp support end assembly 2 includes a bending clamp support base 201 and a bending clamp support chuck 202, the bending clamp support base 201 is fixedly connected to the test machine chuck fixed end 1 by bolts, and the bending clamp support chuck 202 is fixedly connected to the bending clamp support base 201 by bolts. The bending clamp support chuck 202 is used to support the T-shaped rib test piece 3.

[0036] The bending clamp loading end assembly 4 is used to apply bending load to the T-shaped rib test piece 3. The bending clamp loading end assembly 4 includes a bending clamp test machine connecting base 401, a bending clamp torque adjusting rod 402, a bending clamp torsion loading arm 403, a bending clamp support loading base 404, and a bending clamp support loading block 405. One end of the bending clamp test machine connecting base 401 is fixedly connected to the test machine chuck movable end 5, and the other end of the bending clamp test machine connecting base 401 is hingedly connected to the bending clamp torque adjusting rod 402 and the bending clamp support loading base 404. The bending clamp torsion loading arm 403 is fixedly connected to the bending clamp torque adjusting rod 402.

[0037] The T-shaped rib test piece 3 includes a web part and a rib part. The web part is positioned by the bending clamp support chuck 202, and the rib part is positioned by the bending clamp support loading base 404 cooperating with the bending clamp support loading block 405.

[0038] The torsion clamp assembly 6 is used to apply torsional load to the T-shaped rib test piece 3, and the torsional load is applied as passive loading. The torsion clamp assembly 6 includes a torsion loading steel wire rope 601, a torsion loading load cell 602, a torsion support double ear 603, and a torsion support base 604. The torsion support base 604 is fixedly connected to the bearing floor by bolts to ensure the accuracy of the torsional load measurement. The torsion support double ear 603 is installed on the torsion support base 604, the torsion loading load cell 602 is connected to the torsion support double ear 603 through the torsion loading steel wire rope 601, and the torsion loading steel wire rope 601 is fixedly connected to the bending clamp torsion loading arm 403.

[0039] In the preferred embodiment of the present application, as Figure 2As shown in the figure, the bending clamp support base 201 includes a first bending clamp support base part and a second bending clamp support base part which are perpendicular to each other, the first bending clamp support base part is fixedly connected with the fixed end 1 of the testing machine clamp head through bolts, and the second bending clamp support base part is provided with connecting holes, and is fixedly connected with the bending clamp support clamp head 202 through bolts. Advantageously, in the embodiment, the second bending clamp support base part is provided with a guide groove, and the torsion loading force gauge 602 is located in the guide groove, the guide groove provides physical constraint for the torsion loading force gauge 602, reduces transverse vibration or deviation, ensures that the torsion force is transmitted in the axial direction, avoids the interference of non-torque components, and enhances stability.

[0040] Further, as shown in the figure, Figure 3 The two ends of the bending clamp support clamp head 202 are provided with connecting holes, and the axial directions of the connecting holes at the two ends are perpendicular to each other, and one end of the bending clamp support clamp head 202 is connected with the bending clamp support base 201. The two bending clamp support clamp heads 202 are used to support the web part of the T-shaped rib test piece 3, wherein the web part of the T-shaped rib test piece 3 is located between the two bending clamp support clamp heads 202, and the two bending clamp support clamp heads 202 are connected through bolts, so as to position the web part.

[0041] In the preferred embodiment of the present application, as shown in the figure, Figure 4 The bending clamp test machine connecting base 401 includes a first bending clamp test machine connecting base part and a second bending clamp test machine connecting base part, the first bending clamp test machine connecting base part is fixedly connected with the movable end 5 of the testing machine clamp head, the second bending clamp test machine connecting base part is in a U shape, is provided with a plurality of connecting holes, and is hingedly connected with the bending clamp torque adjusting rod 402 and the bending clamp support loading base 404. The bending clamp torque adjusting rod 402 and the bending clamp support loading base 404 do not interfere with each other during bending and torsion coordinated deformation.

[0042] As shown in the figure, Figure 5 The bending clamp torque adjusting rod 402 is provided with a plurality of connecting holes (three groups are provided in the embodiment), and the end of the bending clamp torque adjusting rod 402 is provided with a mounting groove. As shown in the figure, Figure 6 The bending clamp torsion loading arm 403 is in a circular arc shape, is arranged in the mounting groove of the bending clamp torque adjusting rod 402, and is connected with the bending clamp torque adjusting rod 402 through bolts.

[0043] As shown in the figure, Figures 7-8 The bending clamp support loading base 404 includes a first bending clamp support loading base part and a second bending clamp support loading base part, the first bending clamp support loading base part is in a double-ear structure, and the second bending clamp support loading base part is provided with a mounting boss which cooperates with the bending clamp support loading block 405.

[0044] The composite T-shaped rib bending and torsion coupling loading test device of the present application is installed as follows: first, the bending clamp test machine connecting base 401 is installed according to the loading center position of the lower clamp of the testing machine, and after the position is correct, the bending clamp test machine connecting base 401 is connected and fixed through the movable end 5 of the testing machine clamp of the lower clamp of the testing machine; the bending clamp torque adjusting rod 402 is installed by using the outermost two bolt holes of the bending clamp test machine connecting base 401, and the bending clamp torsion loading arm 403 is connected by using a bolt; then the bending clamp support loading base 404 is continuously installed by using the center position bolt hole of the bending clamp test machine connecting base 401, the rib part of the T-shaped rib test piece 3 is determined and installed, the bending clamp support loading block 405 is connected to the bending clamp support loading base 404 by using a bolt, and the connection bolt tightening torque is determined; the bending clamp support base 201 is installed at the loading center position of the upper clamp of the testing machine, and the bending clamp support clamp 202 is connected by using a bolt, then the web part of the T-shaped rib test piece 3 is connected through the four bolt holes on the bending clamp support clamp 202, the bolt torque is ensured to be the same, and finally the connection bolt of the bending clamp support base 201 and the bending clamp support clamp 202 is tightened with the same torque, thus the bending loading test device is installed.

[0045] According to the above installation state, the position of the torsion support base 604 is determined, and is connected to the bearing floor by a bolt, then the torsion support double ears 603 are installed, and the torsion loading steel wire rope 601 and the torsion loading force gauge 602 are connected, finally the torsion loading steel wire rope 601 is connected to the bending clamp torsion loading arm 403 by a bolt, and the outermost two bolts of the bending clamp test machine connecting base 401 are removed, thus all the installation is completed.

[0046] After all the above installation is completed, the test can be carried out, during the test, the upper clamp of the testing machine is fixed, first, the tensile load is applied through the lower clamp of the testing machine, which is the bending load for the T-shaped rib test piece 3, because the bending clamp loading end assembly 4 moves downward, the bending clamp torque adjusting rod 402, the bending clamp torsion loading arm 403 and the bending clamp support loading base 404 follow, at the same time, because of the constraint action of the torsion clamp assembly 6, the bending clamp torque adjusting rod 402, the bending clamp torsion loading arm 403 and the bending clamp support loading base 404 rotate around the center position bolt of the bending clamp test machine connecting base 401, and the torsion deformation is applied to the T-shaped rib test piece 3, the torsion arm is simply calculated, the torsion load is measured by the torsion loading force gauge 602, the bending and torsion coordinated deformation loading and support requirements of the T-shaped rib are more truly simulated, and the simulation of the T-shaped rib with different bending / torsion ratios is broken through.

[0047] The composite T-shaped rib bending and torsion coupling loading test device of the application realizes the simulation of the failure mechanism and load transmission mechanism of the T-shaped rib test piece 3, can realize the application of bending load to the T-shaped rib test piece 3 alone, breaks through the bending load and torsion load coupling loading technology, can realize the bending load and torsion load coupling loading of the composite T-shaped rib test piece 3, can realize different bending / torsion load ratio loading, the test result is reliable, and the accuracy of the load application is ensured.

[0048] The above is only a specific embodiment of the application, but the protection scope of the application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the application, which should be covered in the protection scope of the application. Therefore, the protection scope of the application should be subject to the protection scope of the claims.

Claims

1. A composite material T-shaped rib bending and torsion coupling loading test device, characterized in that: include: A bending fixture support end assembly (2), the bending fixture support end assembly (2) comprising a bending fixture support base (201) and a bending fixture support chuck (202), the bending fixture support base (201) being fixedly connected to the testing machine chuck fixed end (1), and the bending fixture support chuck (202) being fixedly connected to the bending fixture support base (201); A bending fixture loading end assembly (4), the bending fixture loading end assembly (4) comprising a bending fixture test machine connecting base (401), a bending fixture torque adjustment rod (402), a bending fixture torsion loading arm (403), a bending fixture support loading base (404) and a bending fixture support loading block (405), one end of the bending fixture test machine connecting base (401) being fixedly connected to the test machine chuck movable end (5), the other end of the bending fixture test machine connecting base (401) being hinged to the bending fixture torque adjustment rod (402) and the bending fixture support loading base (404), and the bending fixture torsion loading arm (403) being fixedly connected to the bending fixture torque adjustment rod (402); A T-shaped rib test piece (3), the T-shaped rib test piece (3) comprising a web portion and a rib portion, the web portion being positioned by the bending fixture support chuck (202), and the rib portion being positioned by the bending fixture support loading base (404) in cooperation with the bending fixture support loading block (405); A torsion clamp assembly (6), comprising a torsion loading steel wire rope (601), a torsion loading dynamometer (602), a torsion supporting double ears (603) and a torsion supporting base (604), wherein the torsion supporting base (604) is fixedly connected to a load-bearing floor, the torsion supporting double ears (603) are mounted on the torsion supporting base (604), the torsion loading dynamometer (602) is connected to the torsion supporting double ears (603) via the torsion loading steel wire rope (601), and the torsion loading steel wire rope (601) is fixedly connected to the torsion loading arm (403) of the bending clamp.

2. The composite material T-shaped rib bending and torsion coupling loading test device according to claim 1 is characterized in that: The bending fixture support base (201) comprises a first bending fixture support base portion and a second bending fixture support base portion, wherein the first bending fixture support base portion is fixedly connected to the testing machine chuck fixed end (1), and the second bending fixture support base portion is fixedly connected to the bending fixture support chuck (202).

3. The composite material T-shaped rib bending and torsion coupling loading test device according to claim 2, characterized in that: A guide groove is provided on the supporting base portion of the second bending fixture, and the torsion loading dynamometer (602) is located in the guide groove.

4. The composite material T-shaped rib bending and torsion coupling loading test device according to claim 3, characterized in that: The bending fixture supporting chucks (202) include two, the web portion of the T-shaped rib test piece (3) is located between the two bending fixture supporting chucks (202), and the two bending fixture supporting chucks (202) are connected by bolts to position the web portion.

5. The composite material T-shaped rib bending and torsion coupling loading test device according to claim 1, characterized in that: The bending fixture test machine connection base (401) includes a first bending fixture test machine connection base portion and a second bending fixture test machine connection base portion, wherein the first bending fixture test machine connection base portion is fixedly connected to the test machine chuck movable end (5), and the second bending fixture test machine connection base portion is U-shaped and has multiple groups of connection holes formed thereon, and the second bending fixture test machine connection base portion is hinged to the bending fixture torque adjustment rod (402) and the bending fixture support loading base (404).

6. The composite material T-shaped rib bending and torsion coupling loading test device according to claim 5, characterized in that: The bending clamp torque adjustment rod (402) is provided with a plurality of connection holes, and the end of the bending clamp torque adjustment rod (402) is provided with a mounting groove.

7. The composite material T-shaped rib bending and torsion coupling loading test device according to claim 6, characterized in that: The bending fixture torsion loading arm (403) is in an arc shape, is arranged in a mounting slot of the bending fixture torque adjustment rod (402), and is connected to the bending fixture torque adjustment rod (402) via a bolt.

8. The composite material T-shaped rib bending and torsion coupling loading test device according to claim 7, characterized in that: The bending fixture support loading base (404) includes a first bending fixture support loading base portion and a second bending fixture support loading base portion, the first bending fixture support loading base portion is a double-ear structure, and the second bending fixture support loading base portion is provided with a mounting boss that cooperates with the bending fixture support loading block (405).

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