CN113654983B - Device and method for testing cementing property of T-direction surface and rigid structure of paper honeycomb - Google Patents
Device and method for testing cementing property of T-direction surface and rigid structure of paper honeycomb Download PDFInfo
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- CN113654983B CN113654983B CN202110870759.5A CN202110870759A CN113654983B CN 113654983 B CN113654983 B CN 113654983B CN 202110870759 A CN202110870759 A CN 202110870759A CN 113654983 B CN113654983 B CN 113654983B
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- 238000012360 testing method Methods 0.000 title claims abstract description 86
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000004026 adhesive bonding Methods 0.000 claims abstract description 9
- 239000002184 metal Substances 0.000 claims description 28
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000012512 characterization method Methods 0.000 abstract description 4
- 241000264877 Hippospongia communis Species 0.000 description 30
- 238000010998 test method Methods 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/04—Measuring adhesive force between materials, e.g. of sealing tape, of coating
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention belongs to the field of electromagnetic functional structural performance characterization, and particularly relates to a device and a method for testing the adhesive bonding performance of a T-facing surface and a rigid structure of a paper honeycomb. By adopting the method, the cementing property of the paper honeycomb T facing surface and the rigid structure can be well represented. When the test sample is fastened in the testing device by the bolts, the upper panel and the lower panel of the test sample are tightly attached to the upper clamping plate and the lower clamping plate of the testing device, and the rigid panel on one side of the test sample is also leveled with the clamping plate of the testing device, so that the whole assembly is ensured to be positioned on the same stress surface, and the stress surface is uniformly stressed, so that the testing precision is realized. By adopting pin connection, the test process has flexibility, and the test sample is prevented from being stressed in other directions in the test process. The accuracy, precision and efficiency of the test are ensured. The bolt and the nut are matched and fastened, so that the diversity of the sizes of test samples is realized, the universality is realized, the repeated utilization can be realized, and the cost and the time of test equipment are greatly saved.
Description
Technical Field
The invention belongs to the field of electromagnetic functional structural performance characterization, and particularly relates to a device and a method for testing the adhesive bonding performance of a T-facing surface and a rigid structure of a paper honeycomb.
Background
In the manufacturing process of the electromagnetic functional structure of the airplane of a certain model, a large number of structures are formed by gluing the T-facing surface of the paper honeycomb with rigid materials such as metal and the like. The T-shaped surface of the paper honeycomb is fixed by cementing with a rigid structure through foaming glue. In the actual use process of the structure, the structure can continuously bear force under the action of an external load, so that the mechanical property of the cementing structure needs to be checked, and the use requirement is met.
The adhesive strength of the T-direction paper honeycomb and the rigid panel is tested, and no relevant test standard can be referred to at present. After the facing surface of the paper honeycomb T is bonded with the rigid panel, the shearing strength of the paper honeycomb is weak, and a failure mode needs to be ensured to be damaged at the bonding surface or the paper honeycomb. When the adhesive bonding strength between the facing surface of the paper honeycomb T and the rigid panel is tested, four bolts are used for fastening a sample between an upper clamping plate and a lower clamping plate of the testing device, the ear is inserted and clamped at the clamping head of the testing machine, and then the fastened sample and the testing device are respectively connected with the ear by adopting pins. The schematic diagram is shown in figure 1.
The invention provides a test method for testing the cementing property of a paper honeycomb T-facing surface and a rigid structure. By adopting the method, the cementing property of the paper honeycomb T facing surface and the rigid structure can be well represented. When the test sample is fastened in the testing device by the bolts 4, the upper panel and the lower panel of the test sample are tightly attached to the upper clamping plate 5 and the lower clamping plate 7 of the testing device, and the metal plate 9 on one side of the test sample is flush with the clamping plate 3 of the testing device, so that the whole assembly is ensured to be positioned on the same stress surface, and the stress surface is uniformly stressed, so that the testing precision is realized. The pin 2 is adopted for connection, the test process has flexibility, and the test sample is prevented from being stressed in other directions in the test process.
Disclosure of Invention
The invention aims to solve the test characterization problem of the cementing performance of the cementing structure of the rigid material such as paper honeycomb T facing surface and metal in the manufacturing process of the electromagnetic functional structure of a certain model of airplane, test and check the mechanical performance of the cementing structure and meet the design requirement.
By adopting the test method, the adhesive bonding performance between the facing surface and the rigid structure of the paper honeycomb T can be well represented, the perpendicularity between the sample and the test device can be ensured in the test process, the stress process has adjustability, the effective adhesive bonding strength between the honeycomb and the rigid panel can be obtained, and the test precision and the test efficiency are ensured.
Technical proposal
A device for testing the cementing property of a paper honeycomb T facing surface and a rigid structure comprises a sample clamping part, an upper device connecting part and a lower device connecting part; the sample clamping part comprises an upper clamping plate 5, a lower clamping plate 7 and a clamping plate 3, wherein the upper clamping plate 5 and the lower clamping plate 7 are connected through four groups of nuts 8 and bolts 4, a honeycomb 6 is adhered to a metal plate 9 and then arranged in the sample clamping part, an ear plug 1 of a connecting part on the device is connected with the clamping plate 3 of the sample clamping part through a pin 2, and an ear plug 1 of a connecting part under the device is connected with the metal plate 9 through a pin 2;
the clamping plate 3 and the metal plate 9 are guaranteed to be on the same working plane.
The clamping plate 3 is perpendicular to the upper clamping plate 5.
The connection area of the ear insert 1 and the clamping plate 3 or the metal plate 9 is provided with a gap.
The thickness of the clamping plate 3 is the same as that of the metal plate 9.
The specimen grip portion should have a stiffness greater than 500MPa.
The length of the metal plate 9 should be greater than the height of the honeycomb 6.
The four groups of nuts 8 and bolts 4 are arranged at four corner edges of the upper clamping plate 5 and the lower clamping plate 7, and each group of nuts 8 and bolts 4 are mutually perpendicular.
A method of testing the cementing properties of a paper honeycomb T-face and rigid structure, the method comprising the steps of:
(1) Measuring the length and width of the sample;
(2) Setting the test speed, wherein the test piece is damaged within 3-6 min. The displacement speed of the cross beam can be generally set to be 0.5mm/min;
(3) The test piece/load plate assembly was installed into the test fixture. During clamping, the clamping plate 3 is clamped firstly, so that the sample is in a freely suspended state, and then the metal plate 9 is clamped.
(4) The clamping moment of the upper clamping plate 5 and the lower clamping plate 7 is moderate, so that the honeycombs are tightly attached to the upper clamping plate 5 and the lower clamping plate 7, and the honeycombs cannot be damaged due to the fact that excessive clamping moment is applied, and the clamping moment is 2.5-3.0N.m.
(5) The test piece is subjected to a tensile load until the test piece breaks.
(6) The failure mode and failure load of the test specimen were recorded.
Technical effects
The invention can realize better characterization of the cementing property of the T-facing surface and the rigid structure of the paper honeycomb. The test sample and the test device are positioned on the same stress surface in the clamping process, and have consistency in the stress process, so that the stress on the bonding surface of the side surface is ensured, and the accuracy, precision and test efficiency of the test are ensured. The bolt and the nut are matched and fastened, so that the diversity of the sizes of test samples is realized, the universality is realized, the repeated utilization can be realized, and the cost and the time of test equipment are greatly saved.
Drawings
FIG. 1 is a schematic diagram of a method for testing the cementing performance of a T-face and rigid structure of a paper honeycomb
In the figure: 1-ear insert, 2-pin, 3-clamping plate, 4-bolt, 5-upper clamping plate, 6-honeycomb, 7-lower clamping plate, 8-nut, 9-metal plate.
Detailed Description
A device for testing the cementing property of a paper honeycomb T facing surface and a rigid structure comprises a sample clamping part, an upper device connecting part and a lower device connecting part; the sample clamping part comprises an upper clamping plate 5, a lower clamping plate 7 and a clamping plate 3, wherein the upper clamping plate 5 and the lower clamping plate 7 are connected through four groups of nuts 8 and bolts 4, a honeycomb 6 is adhered to a metal plate 9 and then arranged in the sample clamping part, an ear plug 1 of a connecting part on the device is connected with the clamping plate 3 of the sample clamping part through a pin 2, and an ear plug 1 of a connecting part under the device is connected with the metal plate 9 through a pin 2;
the clamping plate 3 and the metal plate 9 are guaranteed to be on the same working plane. Otherwise, the accuracy of the adhesive performance test is affected.
The clamping plate 3 is perpendicular to the upper clamping plate 5, and lateral moment cannot be generated during operation.
The connection area of the ear insert 1 and the clamping plate 3 or the metal plate 9 is provided with a gap, and the gap can ensure the centering in the test process.
The thickness of the clamping plate 3 is the same as that of the metal plate 9, and the same working plane can be ensured by the same thickness.
The rigidity of the sample clamping part is more than 500MPa, so that the sample clamping part is ensured not to deform in the test process.
The length of the metal plate 9 is longer than the height of the honeycomb 6, so that the sample can be clamped conveniently.
The four groups of the nuts 8 and the bolts 4 are arranged at four corner edges of the upper clamping plate 5 and the lower clamping plate 7, and the four groups of the nuts 8 and the bolts 4 are mutually perpendicular, so that the fixing and clamping are firmer.
A method of testing the cementing properties of a paper honeycomb T-face and rigid structure, the method comprising the steps of:
(1) Measuring the length and width of the sample;
(2) Setting the test speed, wherein the test piece is damaged within 3-6 min. The displacement speed of the cross beam can be generally set to be 0.5mm/min;
(3) The test piece/load plate assembly was installed into the test fixture. During clamping, the clamping plate 3 is clamped firstly, so that the sample is in a freely suspended state, and then the metal plate 9 is clamped. On one hand, the deviation of the system can be eliminated, and on the other hand, the force acting surface can be ensured to be on the same plane;
(4) The clamping moment of the upper clamping plate 5 and the lower clamping plate 7 is moderate, so that the honeycombs are tightly attached to the upper clamping plate 5 and the lower clamping plate 7, and the honeycombs cannot be damaged due to the fact that excessive clamping moment cannot be applied, and the generally recommended clamping moment is 2.5-3.0N.m.
(5) The test piece is subjected to a tensile load until the test piece breaks.
(6) The failure mode and failure load of the test specimen were recorded.
The sample is placed on the upper clamping plate 5 and the lower clamping plate 7 and tightly attached, and the sample is fastened by the adjusting bolt 4 and the nut 8. The ear plug 1 is clamped at the clamping head of the testing machine, and the clamping plate 3 is connected with the upper ear plug 1 through the pin 2. The metal plate 9 of the sample is connected to the lower ear insert 1 by the pin 2. The cementing performance of the facing surface and the rigid structure of the paper honeycomb T is characterized by moving the clamping head of the testing machine.
(1) The bolts 4 are used for fastening, the sample is tightly attached to the upper clamping plate 5 and the lower clamping plate 7 of the testing device, and the metal plate 9 is flush with the clamping plate 3 of the testing device, so that the same verticality is ensured;
(2) The pin 2 is adopted for connection, so that flexibility is provided in the test process, and the test sample is prevented from being stressed in other directions in the test process;
(3) An effective damage mode between the paper honeycomb T facing surface and the metal plate is realized, and effective experimental data are obtained.
Claims (8)
1. The device for testing the cementing property of the facing surface and the rigid structure of the paper honeycomb T is characterized by comprising a sample clamping part, an upper device connecting part and a lower device connecting part; the sample clamping part comprises an upper clamping plate (5), a lower clamping plate (7) and a clamping plate (3), wherein the upper clamping plate (5) and the lower clamping plate (7) are connected through four groups of nuts (8) and bolts (4), a honeycomb (6) is arranged in the sample clamping part after being bonded with a metal plate (9), the clamping plate (3) and the metal plate (9) are guaranteed to be on the same working plane, and the clamping plate (3) is fixedly connected with the upper clamping plate (5); the ear plug (1) of the upper connecting part of the device is connected with the clamping plate (3) of the sample clamping part through the pin (2), and the ear plug (1) of the lower connecting part of the device is connected with the metal plate (9) through the pin (2).
2. Device for testing the adhesive properties of paper honeycomb T-facing and rigid structures according to claim 1, characterized in that the clamping plate (3) is perpendicular to the upper clamping plate (5).
3. Device for testing the adhesive bonding properties of paper honeycomb T-facing and rigid structures according to claim 1, characterized in that the area of the connection of the ear insert (1) with the clamping plate (3) or the metal plate (9) is provided with a gap.
4. Device for testing the adhesive properties of paper honeycomb T-facing and rigid structures according to claim 1, characterized in that the clamping plate (3) is of the same thickness as the metal plate (9).
5. The device for testing the adhesive bonding performance of a paper honeycomb T-face and a rigid structure according to claim 1, wherein the rigidity of the sample clamping part is more than 500MPa.
6. Device for testing the adhesive bonding properties of paper honeycomb T-facing and rigid structures according to claim 1, characterized in that the length of the metal plate (9) is greater than the height of the honeycomb (6).
7. The device for testing the cementing property of the facing surface and the rigid structure of the paper honeycomb T according to claim 1, wherein the four groups of the bolts (4) of the nuts (8) are arranged at four corner edges of the upper clamping plate (5) and the lower clamping plate (7), and the bolts (4) of each group of the nuts (8) are mutually perpendicular.
8. A method for testing the cementing property of a honeycomb T-facing and rigid structure of a test paper by using the device as claimed in any one of claims 1 to 7, comprising the steps of:
(1) Measuring the length and width of the sample;
(2) Setting a test speed, wherein the test piece is damaged within 3-6 min; setting the displacement speed of the cross beam to be 0.5mm/min;
(3) Installing the test piece/loading plate assembly into a test fixture; during clamping, the clamping plate (3) is clamped firstly, so that the sample is in a freely suspended state, and then the metal plate (9) is clamped;
(4) The clamping moment of the upper clamping plate (5) and the lower clamping plate (7) is 2.5-3.0N.m;
(5) Applying a tensile load to the test piece until the test piece breaks;
(6) The failure mode and failure load of the test specimen were recorded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110870759.5A CN113654983B (en) | 2021-07-30 | 2021-07-30 | Device and method for testing cementing property of T-direction surface and rigid structure of paper honeycomb |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110870759.5A CN113654983B (en) | 2021-07-30 | 2021-07-30 | Device and method for testing cementing property of T-direction surface and rigid structure of paper honeycomb |
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| Publication Number | Publication Date |
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| CN113654983A CN113654983A (en) | 2021-11-16 |
| CN113654983B true CN113654983B (en) | 2024-04-09 |
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| CN202110870759.5A Active CN113654983B (en) | 2021-07-30 | 2021-07-30 | Device and method for testing cementing property of T-direction surface and rigid structure of paper honeycomb |
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| CN114674654A (en) * | 2022-04-08 | 2022-06-28 | 天津大学 | Clamping device and method for T-shaped sample or cross node sample |
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