CN111272542A - Composite material T-shaped joint pull-off test device - Google Patents
Composite material T-shaped joint pull-off test device Download PDFInfo
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- CN111272542A CN111272542A CN202010262331.8A CN202010262331A CN111272542A CN 111272542 A CN111272542 A CN 111272542A CN 202010262331 A CN202010262331 A CN 202010262331A CN 111272542 A CN111272542 A CN 111272542A
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- end seat
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- pressing plate
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- 239000002131 composite material Substances 0.000 title claims abstract description 28
- 238000007585 pull-off test Methods 0.000 title claims abstract description 24
- 238000003825 pressing Methods 0.000 claims abstract description 40
- 238000012360 testing method Methods 0.000 claims abstract description 25
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 5
- 230000000712 assembly Effects 0.000 claims description 7
- 238000000429 assembly Methods 0.000 claims description 7
- 238000009958 sewing Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 4
- 238000009434 installation Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
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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)
- Connection Of Plates (AREA)
Abstract
The application belongs to the field of aircraft structural strength tests, and particularly relates to a composite material T-shaped joint pull-off test device. The method comprises the following steps: the test piece, base, locator subassembly and clamp plate subassembly. The sample is T-shaped and comprises an upper end plate and a lower end plate which are vertically connected with each other; the base is T-shaped and comprises an upper end seat and a lower end seat which are vertically connected with each other, and the lower end seat is used for clamping the testing machine; the positioner assembly comprises a bidirectional positioning block and a screw, and the bidirectional positioning block is fixed on the upper end seat of the base through the screw; the pressing plate assembly comprises a nut, an upper pressing plate, a lower pressing plate and a stud, the lower pressing plate is tightly attached to one side of the bidirectional positioning block and fixed on the upper end seat of the base through the stud matching nut, the upper pressing plate and the upper pressing plate of the sample are sequentially arranged on the lower pressing plate and fixedly connected through the stud matching nut, and the upper pressing plate of the sample is tightly attached to the other side of the bidirectional positioning block. This application can improve combined material T type joint and draw experimental precision and efficiency of taking off.
Description
Technical Field
The application belongs to the field of aircraft structural strength tests, and particularly relates to a composite material T-shaped joint pull-off test device.
Background
The carbon fiber composite material is widely applied to the design and manufacture of airplanes due to the characteristics of light weight, excellent mechanical property and integral forming. Composite T-joints are often used as a structural integral unit to transfer loads between two perpendicular surfaces, such as in wing boxes, transferring airfoil aerodynamic forces and the like to ribs and spar webs and the like, which are subjected primarily to tensile, shear, lateral bending and combinations thereof. Wherein pull-off failure under tensile load is an important failure mode of composite T-joints.
Because the composite material T-shaped joint pull-off failure process relates to damage of a laminated plate, debonding between a joint flange and a skin, fiber bridging, cracking of a filling area and the like, the failure mechanism is very complex, a composite material T-shaped joint pull-off test is often required to determine the strength of the composite material T-shaped joint pull-off test, during the test, accurate installation of a pressing plate on a span position and accurate centering of a test sample are key factors influencing the effectiveness of the test result and the test efficiency, and how to improve the precision and the efficiency of the composite material T-shaped joint pull-off test is a difficult problem.
Accordingly, a technical solution is desired to overcome or at least alleviate at least one of the above-mentioned drawbacks of the prior art.
Disclosure of Invention
The application aims to provide a composite material T-shaped joint pull-off test device to solve at least one problem existing in the prior art.
The technical scheme of the application is as follows:
a combined material T type connects and draws and takes off test device includes: a test piece, a base, a positioner assembly, and a platen assembly, wherein,
the sample is T-shaped and comprises an upper end plate and a lower end plate which are vertically connected with each other;
the base is T-shaped and comprises an upper end seat and a lower end seat which are vertically connected with each other, the upper end seat is respectively provided with a long hole for installing the pressing plate assembly and a threaded hole for installing the positioner assembly, and the lower end seat is used for clamping the testing machine;
the positioner assembly comprises a bidirectional positioning block and a screw, and the bidirectional positioning block is fixed on the upper end seat of the base through the screw;
the clamp plate assembly comprises a nut, an upper pressing plate, a lower pressing plate and a stud, wherein the lower pressing plate is tightly attached to one side of the bidirectional positioning block, the stud is matched with the nut and fixed on an upper end seat of the base, the lower pressing plate is sequentially provided with the upper pressing plate and the upper pressing plate, the upper pressing plate is fixedly connected with the stud in a matched mode, and the upper pressing plate of the sample is tightly attached to the other side of the bidirectional positioning block.
Optionally, the upper end plate and the lower end plate of the sample are connected by bonding or sewing.
Optionally, the upper end seat and the lower end seat of the base are integrally formed.
Optionally, the upper end seat of the base is provided with a plurality of strip holes with different spans.
Optionally, the positioner subassembly includes two sets ofly, two sets of the positioner subassembly sets up the homonymy of the up end board of sample, every two-way locating piece is respectively through two fix with screw on the upper end seat of base.
Optionally, the pressure plate assemblies include two groups, which are respectively disposed at two ends of the upper end plate of the sample.
Optionally, a washer is further included for mating with the connection of the nut.
Optionally, mounting holes are symmetrically formed in two ends of the lower pressing plate, a groove is formed in the upper surface of the lower pressing plate corresponding to the mounting holes, and the groove is used for embedded mounting of the nut.
The invention has at least the following beneficial technical effects:
the composite material T-shaped joint pull-off test device can improve the precision and efficiency of a composite material T-shaped joint pull-off test.
Drawings
FIG. 1 is a schematic overall view of a composite T-joint pull-off test apparatus according to one embodiment of the present application;
FIG. 2 is a schematic sample view of a composite T-joint pull-off test apparatus according to one embodiment of the present application;
FIG. 3 is a schematic view of a platen assembly of a composite T-joint pull-off test apparatus according to one embodiment of the present application;
FIG. 4 is a schematic view of a positioner assembly of a composite T-joint pull-off test apparatus according to one embodiment of the present application;
FIG. 5 is a schematic view of the base of a composite T-joint pull-off test apparatus according to one embodiment of the present application.
Wherein:
1-sample; 2-a platen assembly; 3-a locator assembly; 4-a base; 5-a nut; 6, an upper pressing plate; 7-pressing the lower plate; 8-a stud; 9-a gasket; 10-bidirectional positioning blocks; 11-screws.
Detailed Description
In order to make the implementation objects, technical solutions and advantages 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. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are a subset of the embodiments in the present application and not all embodiments in the present application. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. Embodiments of the present application will be described in detail below with reference to the accompanying drawings.
In the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present application and for simplifying the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be construed as limiting the scope of the present application.
The present application is described in further detail below with reference to fig. 1 to 5.
The application provides a combined material T type connects and draws and takes off test device includes: sample 1, base 4, positioner assembly 3, and platen assembly 2.
Specifically, the sample 1 is T-shaped and includes an upper end plate and a lower end plate which are vertically connected to each other, and in this embodiment, the upper end plate and the lower end plate are bonded or sewn together. The base 4 is T-shaped and comprises an upper end seat and a lower end seat which are vertically connected with each other, the upper end seat and the lower end seat are integrally formed, the upper end seat is respectively provided with a strip hole for installing the pressing plate assembly 2 and a threaded hole for installing the positioner assembly 3, and the lower end seat is used for clamping with a testing machine; the positioner component 3 comprises an L-shaped bidirectional positioning block 10 and a screw 11, and the bidirectional positioning block 10 is fixed on the upper end seat of the base 4 through the screw 11; the pressing plate assembly 2 comprises a nut 5, an upper pressing plate 6, a lower pressing plate 7 and a stud 8, wherein the lower pressing plate 7 is tightly attached to one side of the bidirectional positioning block 10 and is fixed on an upper end seat of the base 4 through the stud 8 matched with the nut 5, the upper pressing plate 7 is sequentially provided with the upper end plate of the sample 1 and the upper pressing plate 6 and is fixedly connected with the nut 5 through the stud 8 matched with the upper pressing plate, and the upper end plate of the sample 1 is tightly attached to the other side of the bidirectional positioning block 10.
In an embodiment of this application, the upper end seat of base 4 is the rectangle, has all carved with the central line along length and width direction, has seted up the rectangular hole of a plurality of different spans on the upper end seat of base 4 to the installation of clamp plate subassembly 2 when satisfying different span loads, the position of the screw hole for locator subassembly 3 installation requires to set up according to the loading span.
In one embodiment of the present application, the positioning assemblies 3 include two sets, the two sets of positioning assemblies 3 are disposed on the same side of the upper end plate of the test sample 1, and each two-way positioning block 10 is fixed on the upper end seat of the base 4 by two screws 11.
In one embodiment of the present application, the platen assemblies 2 include two sets, respectively disposed at both ends of the upper end plate of the test piece 1.
Advantageously, in this embodiment, a washer 9 is also included, the washer 9 being intended to cooperate with the coupling of the nut 5.
Advantageously, in this embodiment, the two ends of the lower pressing plate 7 are symmetrically provided with mounting holes, the upper surface of the lower pressing plate 7 is provided with a groove corresponding to the mounting holes, and the groove is used for embedded mounting of the nut 5.
The application discloses combined material T type connects and draws and takes off test device, when the preparation, can include following step:
the method comprises the following steps: determining the size of the bidirectional positioning block 10 according to the width of the sample 1, and taking the coincidence of the center of the sample 1 in the width direction and the width center of the upper end seat of the base 4 as the standard after the sample 1 is tightly attached to the bidirectional positioning block 10;
step two: determining the position of a threaded hole on an upper end seat of the base 4 according to the required loading span, and taking the coincidence of the center line of the pressure plate assembly 2 and the span position as the standard after the pressure plate assembly 2 is tightly attached to the bidirectional positioning block 10;
step three: a bidirectional positioning block 10 is arranged on the upper end seat of the base 4 through a screw 11;
step four: the lower pressing plate 7 is tightly attached to the positioner component 3 and is fixed on the upper end seat of the base 4 through the stud 8 and the nut 5, two grooves are formed in the lower pressing plate 7 and are embedded into the two nuts 5 for pressing, and therefore position change caused by a large number of assembling and disassembling in the repeated test process can be avoided, and test efficiency is improved;
step five: the sample 1 is placed on the upper surface of the lower pressing plate 7, the side surface of the sample is tightly attached to the positioner component 3, two end surfaces of the sample are respectively flush with or keep equal distance with two ends of the lower pressing plate 7, and the sample can be tested after being clamped by the upper pressing plate 6.
The composite material T-shaped joint pull-off test device is simple in structure, the positioning part is added, and the precision and the efficiency of a composite material T-shaped joint pull-off test are improved.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (8)
1. The utility model provides a combined material T type connects and draws and takes off test device which characterized in that includes: a test sample (1), a base (4), a locator assembly (3) and a pressure plate assembly (2), wherein,
the test sample (1) is T-shaped and comprises an upper end plate and a lower end plate which are vertically connected with each other;
the base (4) is T-shaped and comprises an upper end seat and a lower end seat which are vertically connected with each other, the upper end seat is respectively provided with a long hole for mounting the pressure plate assembly (2) and a threaded hole for mounting the positioner assembly (3), and the lower end seat is used for clamping with a testing machine;
the positioner component (3) comprises a bidirectional positioning block (10) and a screw (11), and the bidirectional positioning block (10) is fixed on the upper end seat of the base (4) through the screw (11);
the clamp plate component (2) comprises a nut (5), an upper press plate (6), a lower press plate (7) and a stud (8), wherein the lower press plate (7) is tightly attached to one side of a bidirectional positioning block (10), the stud (8) is matched with the nut (5) and is fixed on an upper end seat of a base (4), the upper press plate (7) is sequentially provided with the upper end plate of a sample (1) and the upper press plate (6) and is fixedly connected with the stud (8) through the nut (5), and the upper end plate of the sample (1) is tightly attached to the other side of the bidirectional positioning block (10).
2. The composite material T-shaped joint pull-off test device according to claim 1, wherein the upper end plate and the lower end plate of the test sample (1) are connected through bonding or sewing.
3. The composite material T-joint pull-off test device according to claim 1, wherein the upper end seat and the lower end seat of the base (4) are integrally formed.
4. The composite material T-shaped joint pull-off test device according to claim 3, wherein a plurality of long holes with different spans are formed in the upper end seat of the base (4).
5. The composite material T-shaped joint pull-off test device according to claim 1, wherein the positioner assemblies (3) comprise two sets, the two sets of positioner assemblies (3) are arranged on the same side of the upper end plate of the test specimen (1), and each bidirectional positioning block (10) is fixed on the upper end seat of the base (4) through two screws (11).
6. The composite material T-shaped joint pull-off test device according to claim 1, wherein the pressure plate assemblies (2) comprise two groups, and the two groups are respectively arranged at two ends of an upper end plate of the test sample (1).
7. The composite T-joint pull-off test device according to claim 6, further comprising a washer (9), wherein the washer (9) is used for matching the connection of the nut (5).
8. The composite material T-shaped joint pull-off test device according to claim 6, wherein mounting holes are symmetrically formed in two ends of the lower pressing plate (7), and grooves are formed in the upper surface of the lower pressing plate (7) corresponding to the mounting holes and used for embedded mounting of the nuts (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010262331.8A CN111272542A (en) | 2020-04-06 | 2020-04-06 | Composite material T-shaped joint pull-off test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010262331.8A CN111272542A (en) | 2020-04-06 | 2020-04-06 | Composite material T-shaped joint pull-off test device |
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| CN111272542A true CN111272542A (en) | 2020-06-12 |
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| CN202010262331.8A Pending CN111272542A (en) | 2020-04-06 | 2020-04-06 | Composite material T-shaped joint pull-off test device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112577820A (en) * | 2020-11-24 | 2021-03-30 | 江苏科技大学 | Tensile test method for T-shaped welding joint |
| CN112595579A (en) * | 2020-12-30 | 2021-04-02 | 华侨大学 | Self-adaptation metal sheet normal direction joint strength test device |
| CN112945714A (en) * | 2021-02-03 | 2021-06-11 | 南京航空航天大学 | Clamping detection device based on pull-out test and use method thereof |
| CN113776930A (en) * | 2021-09-01 | 2021-12-10 | 中国航发北京航空材料研究院 | Combined material T type connecting piece is drawn, is pressed experimental universal fixturing |
| CN114720269A (en) * | 2022-04-02 | 2022-07-08 | 中国飞机强度研究所 | Tensile test fixture for single-side lap joint structure of plate |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112577820A (en) * | 2020-11-24 | 2021-03-30 | 江苏科技大学 | Tensile test method for T-shaped welding joint |
| CN112595579A (en) * | 2020-12-30 | 2021-04-02 | 华侨大学 | Self-adaptation metal sheet normal direction joint strength test device |
| CN112945714A (en) * | 2021-02-03 | 2021-06-11 | 南京航空航天大学 | Clamping detection device based on pull-out test and use method thereof |
| CN112945714B (en) * | 2021-02-03 | 2022-12-13 | 南京航空航天大学 | Clamping detection device based on pull-out test and use method thereof |
| CN113776930A (en) * | 2021-09-01 | 2021-12-10 | 中国航发北京航空材料研究院 | Combined material T type connecting piece is drawn, is pressed experimental universal fixturing |
| CN114720269A (en) * | 2022-04-02 | 2022-07-08 | 中国飞机强度研究所 | Tensile test fixture for single-side lap joint structure of plate |
| CN114720269B (en) * | 2022-04-02 | 2024-06-07 | 中国飞机强度研究所 | Tensile test fixture for single-side lap joint structure of plate |
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Application publication date: 20200612 |