CN214566237U - Fixing device for cap-shaped straight plate wall plate structure pull-off test - Google Patents
Fixing device for cap-shaped straight plate wall plate structure pull-off test Download PDFInfo
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- CN214566237U CN214566237U CN202023338075.0U CN202023338075U CN214566237U CN 214566237 U CN214566237 U CN 214566237U CN 202023338075 U CN202023338075 U CN 202023338075U CN 214566237 U CN214566237 U CN 214566237U
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Abstract
The utility model provides a fixing device for a cap-shaped straight plate wallboard structure pull-off test, wherein the cap-shaped straight plate wallboard structure comprises a first straight plate and a curved plate, and the fixing device comprises a base, a clamping block, an upper clamping rod, a lower clamping rod and a clamping device; the lower clamping rod is fixed on the bottom surface of the base; the bottom of the clamping block is connected with the base, and the top of the clamping block is detachably connected with a clamping plate; two ends of the first straight plate extend into the clamping blocks and the clamping plates to be fixed, and the upper clamping rod is fixed on the clamping device; the clamping device comprises a clamping rod and an arched loading block, the arched loading block comprises a top plate and two L-shaped plates connected to the bottom of the top plate, cushion blocks are arranged on the L-shaped plates, and the curved plates are arranged between the top plate and the cushion blocks; the top plate is provided with a through threaded hole, and the lower part of the clamping rod is connected with the threaded hole in a matching way. The utility model can realize the fixed clamping restraint of the bent plate and can ensure the uniformity of the load application; the fixing device can be used for fixing bent plate test pieces with different sizes, and the clamping position can be adjusted to obtain the introduction of damage to different parts of the test piece.
Description
Technical Field
The utility model belongs to aircraft structural strength test field, concretely relates to cap type straight plate wallboard structure draws takes off experimental fixing device.
Background
Composite straight panel wall panel construction is a form of construction that is widely available in modern aircraft design. The bent plate is of a thin-wall structure, when the bent plate is subjected to compressive load, the problem of local or overall instability can exist, and the instability resistance of the wall plate structure can be obviously improved by adding the straight plate. The composite material straight plate and the composite material curved plate are generally bonded together by adopting a co-curing or post-curing mode through an adhesive, and bear external load together. Because the out-of-plane tensile strength of the adhesive is weaker, debonding is a common failure mode of a straight plate and wall plate joint structure, and is also a difficult problem which needs to be solved by post-buckling design of the composite material reinforced wall plate. Since the debonding load is difficult to obtain accurately by finite element calculation, it needs to be obtained by using a test method. The pull-off test is a typical and common test in the test for verifying the bearing capacity of the bonded structure, and can obtain a pull-off load and a debonding failure mode, research debonding influence factors under the action of an out-of-plane load, verification of a debonding calculation method and the like.
For pull-off tests, it is necessary to ensure that the boundary conditions and load application conditions of the test pieces are consistent with those in the project. The boundary conditions and load application conditions were: the curved plate is fixedly clamped and restrained, and the straight plate bears the external load. In the past, all the test schemes are restricted by simple supporting strips and loaded by direct clamping or bolts. The simple support constraint can cause the constraint rigidity of the curved plate to be smaller than the actual constraint rigidity, so that the deformation of the curved plate is overlarge; clamping or bolt loading can cause load asymmetry and consequently uneven loading of the glued joint. Need guarantee the glue film atress basically even through debugging repeatedly or other modes that can influence the load transmission, seriously influence test efficiency, also can't thoroughly solve simultaneously that the load is applyed inhomogeneous problem.
SUMMERY OF THE UTILITY MODEL
The utility model provides a fixing device for cap-shaped straight plate wall plate structure pull-off test, which can realize the fixed clamping restraint of the curved plate and provide the restraint close to the real rigidity of the curved plate in the airplane structure; while ensuring uniformity in the application of the load.
The utility model provides an above-mentioned technical problem's technical scheme as follows: a fixing device for a pull-out test of a cap-shaped straight plate wall plate structure comprises a first straight plate and a cap-shaped curved plate which is glued to the first straight plate, and the fixing device comprises a base, a clamping block, an upper clamping rod, a lower clamping rod and a clamping device; the lower clamping rods are fixed on the bottom surface of the base, the number of the clamping blocks is two, the bottom of the clamping blocks is connected with the base, and the top of the clamping blocks is detachably connected with a clamping plate; two ends of the first straight plate extend into the clamping blocks and the clamping plates to be fixed, and the upper clamping rod is fixed to the clamping device; the clamping device comprises a clamping rod and an arched loading block, the arched loading block comprises a top plate and two L-shaped plates connected to the bottom of the top plate, cushion blocks are arranged on the L-shaped plates, and the curved plates are arranged between the top plate and the cushion blocks; the lower part of the clamping rod is provided with external threads, the top plate is provided with a through threaded hole, and the lower part of the clamping rod is connected with the threaded hole in a matching manner.
The utility model discloses further set up to, it has the through-hole to open on the splint, it has the screw hole that the position corresponds to open on the clamp splice, the through-hole with threaded depression bar is equipped with in the screw hole.
The utility model discloses further set up to, the depression bar with be equipped with the rubber pad between the first straight plate.
The utility model is further arranged that the top surface of the base is connected with a track along the length direction, and the bottom of the clamping block is provided with a clamping groove matched with the track; the base on the track both sides is opened there is the bar hole, is located directly over the bar hole the bottom of clamp splice is opened there is the mounting hole, pass the bar hole with the mounting hole detachably is equipped with the mounting.
The utility model is further arranged in that the top of the clamping bar is connected with a clamping head, and both sides of the clamping head are connected with a fixed shaft; the upper clamping rod comprises a clamping rod on the upper portion and an inverted U-shaped connecting piece connected to the lower portion of the clamping rod, and the fixed shaft is located in the inverted U-shaped connecting piece and is rotatably connected with the inverted U-shaped connecting piece.
The utility model discloses following beneficial effect has:
(1) the utility model discloses a fixing device sets up bow-shaped loading piece and cushion and is used for the centre gripping bent plate, realizes the fixed centre gripping restraint of bent plate, can ensure the homogeneity that the load was applyed simultaneously.
(2) The utility model discloses a fixing device sets up apart from two clamp splices of adjustable, can be used to the fixed of not unidimensional bent plate test piece, and can further adjust the damage that clamping position obtained the different positions of test piece and introduce, and the commonality is stronger. The design and operation are convenient, and the design is ingenious.
Drawings
Fig. 1 is a schematic perspective view of an embodiment of the present invention;
fig. 2 is a schematic bottom structure diagram of an embodiment of the present invention;
fig. 3 is a schematic view of a part of the structure of the embodiment of the present invention.
1-1, a first straight plate; 1-2, a curved plate; 2. a lower clamping rod; 3. a base; 4. a clamping block; 5. a splint; 6. an upper clamping rod; 6-1, clamping rods; 6-2, an inverted U-shaped connecting piece; 7. a clamping device; 7-1, clamping a rod; 7-2, an arch loading block; 7-2-1, a top plate; 7-2-2, L-shaped plate; 7-3, cushion blocks; 7-4, clamping heads; 7-5, fixing the shaft; 8. a pressure lever; 9. a track; 10. a strip-shaped hole; 11. and (7) installing holes.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-3, the present invention provides a fixing device for a cap-shaped straight plate 1-1 wall plate structure pull-off test, wherein the cap-shaped straight plate 1-1 wall plate structure 1 comprises a first straight plate 1-1 and a cap-shaped curved plate 1-2 glued to the first straight plate 1-1, and the two second straight plates of the curved plate 1-2 may be the same or different in length. The fixing device comprises a base 3, a clamping block 4, an upper clamping rod 6, a lower clamping rod 2 and a clamping device 7. Lower clamping rod 2 is fixed in the bottom surface of base 3, and base 3 is connected to the bottom of clamp splice 4, and the top detachably of clamp splice 4 is connected with splint 5, and the both ends of first straight board 1-1 are stretched into clamp splice 4 and are fixed down with splint 5, go up clamping rod 6 and fix to clamping device 7. The clamping device 7 comprises a clamping rod 7-1 and an arched loading block 7-2, the arched loading block 7-2 comprises a top plate 7-2-1 and two L-shaped plates 7-2-2 connected to the bottom of the top plate 7-2-1, cushion blocks 7-3 are arranged on the L-shaped plates 7-2-2, and the curved plates 1-2 are arranged between the top plate 7-2-1 and the cushion blocks 7-3; the lower part of the clamping rod 7-1 is provided with external threads, the top plate 7-2-1 is provided with a through threaded hole, and the lower part of the clamping rod 7-1 is connected with the threaded hole in a matching way.
Specifically, a through hole is formed in the clamping plate 5, a threaded hole corresponding to the clamping block 4 is formed in the clamping block, and a pressure rod 8 with threads is arranged in the through hole and the threaded hole.
Further, a rubber pad can be arranged between the compression bar 8 and the first straight plate 1-1 according to requirements.
In order to adjust the installation position of the test piece conveniently, the top surface of the base 3 is connected with a rail 9 along the length direction of the base, and the bottom of the clamping block 4 is provided with a clamping groove matched with the rail 9. The base 3 on the both sides of track 9 is opened there is a bar hole 10, and the bottom of clamp splice 4 that is located bar hole 10 directly over opens there is mounting hole 11, passes bar hole 10 and mounting hole 11 detachably and is equipped with the mounting member such as bolt.
The top of the clamping rod 7-1 is connected with a clamping head 7-4, and two sides of the clamping head 7-4 are connected with a fixed shaft 7-5. The upper clamping rod 6 comprises an upper clamping rod 6-1 and an inverted U-shaped connecting piece 6-2 connected to the lower part of the clamping rod 6-1, and the fixed shaft 7-5 is positioned in the inverted U-shaped connecting piece 6-2 and is rotatably connected with the inverted U-shaped connecting piece 6-2.
The utility model discloses a process of fixing device installation test piece does:
(1) preparing a test piece which comprises a first straight plate 1-1 and a curved plate 1-2 which are glued;
(2) installing a test piece into the clamping block 4 and the clamping plate 5, adjusting to a required position, screwing the threaded pressure rod 8 into the clamping plate 5, adding or not using a rubber pad between the test piece and the pressure rod 8 according to requirements, providing different pressing forces through a torque wrench, and fixing the test piece in the clamping plate 5;
(3) the clamping blocks 4 are placed on the base 3, the clamping blocks 4 are adjusted to the position where impact can be introduced to the designated position, the clamping blocks 4 and the base 3 are fixed through bolts, and installation is completed.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (5)
1. A fixing device for a pull-out test of a cap-shaped straight plate wall plate structure comprises a first straight plate and a cap-shaped curved plate which is glued to the first straight plate, and is characterized in that the fixing device comprises a base, a clamping block, an upper clamping rod, a lower clamping rod and a clamping device; the lower clamping rod is fixed on the bottom surface of the base; the bottom of the clamping block is connected with the base, and the top of the clamping block is detachably connected with a clamping plate; two ends of the first straight plate extend into the clamping blocks and the clamping plates to be fixed, and the upper clamping rod is fixed to the clamping device; the clamping device comprises a clamping rod and an arched loading block, the arched loading block comprises a top plate and two L-shaped plates connected to the bottom of the top plate, cushion blocks are arranged on the L-shaped plates, and the curved plates are arranged between the top plate and the cushion blocks; the lower part of the clamping rod is provided with external threads, the top plate is provided with a through threaded hole, and the lower part of the clamping rod is connected with the threaded hole in a matching manner.
2. The fixing device of claim 1, wherein the clamping plate is provided with a through hole, the clamping block is provided with a threaded hole corresponding to the through hole, and a threaded pressure rod is arranged in the through hole and the threaded hole.
3. The fastening device of claim 2, wherein a rubber gasket is disposed between the strut and the first straight plate.
4. The fixing device of claim 1, wherein a rail is connected to the top surface of the base along the length direction of the base, and a clamping groove matched with the rail is formed at the bottom of the clamping block; the base on the track both sides is opened there is the bar hole, is located directly over the bar hole the bottom of clamp splice is opened there is the mounting hole, pass the bar hole with the mounting hole detachably is equipped with the mounting.
5. The fixing device of claim 1, wherein a clamping head is connected to the top of the clamping bar, and a fixing shaft is connected to both sides of the clamping head; the upper clamping rod comprises a clamping rod on the upper portion and an inverted U-shaped connecting piece connected to the lower portion of the clamping rod, and the fixed shaft is located in the inverted U-shaped connecting piece and is rotatably connected with the inverted U-shaped connecting piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023338075.0U CN214566237U (en) | 2020-12-31 | 2020-12-31 | Fixing device for cap-shaped straight plate wall plate structure pull-off test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023338075.0U CN214566237U (en) | 2020-12-31 | 2020-12-31 | Fixing device for cap-shaped straight plate wall plate structure pull-off test |
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| Publication Number | Publication Date |
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| CN214566237U true CN214566237U (en) | 2021-11-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202023338075.0U Active CN214566237U (en) | 2020-12-31 | 2020-12-31 | Fixing device for cap-shaped straight plate wall plate structure pull-off test |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115508205A (en) * | 2022-10-09 | 2022-12-23 | 上海航空材料结构检测股份有限公司 | Composite material cap type stringer pull-off test device and test method |
-
2020
- 2020-12-31 CN CN202023338075.0U patent/CN214566237U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115508205A (en) * | 2022-10-09 | 2022-12-23 | 上海航空材料结构检测股份有限公司 | Composite material cap type stringer pull-off test device and test method |
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