CN209927599U - Anchor clamps suitable for I type bed crack toughness test of combined material - Google Patents
Anchor clamps suitable for I type bed crack toughness test of combined material Download PDFInfo
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- CN209927599U CN209927599U CN201920722154.XU CN201920722154U CN209927599U CN 209927599 U CN209927599 U CN 209927599U CN 201920722154 U CN201920722154 U CN 201920722154U CN 209927599 U CN209927599 U CN 209927599U
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Abstract
The utility model provides an anchor clamps suitable for I type of layer of combined material is split toughness test, including the last anchor clamps and the lower anchor clamps of symmetric distribution, go up anchor clamps and all include connecting device and clamp splice with lower anchor clamps, connecting device and clamp splice pass through the universal joint and connect, connecting device and universal joint pass through the bearing and connect. The bearing is arranged between the connecting device and the universal joint, after the clamp is locked by the testing machine, the clamp rotates on the horizontal plane, the alignment position of the clamp is convenient to be connected with a test piece, the clamp is convenient to be connected with the test piece, and the time for adjusting the clamp is saved; the utility model discloses in the universal joint that sets up, can make anchor clamps rotate with two directions of horizontal plane vertically, make things convenient for the centering of test piece to adjust, very big improvement test efficiency. The clamp is compact in size, convenient to install, time-saving and labor-saving. The accurate positioning of the sample can be realized, the direction of a chuck of the testing machine can be quickly adapted, the testing time is saved, and the clamp is light and convenient.
Description
Technical Field
The utility model relates to a combined material mechanical properties tests technical field, concretely relates to anchor clamps suitable for I type bed crack toughness test of combined material.
Background
The composite material has the advantages of high specific strength and specific stiffness, excellent fatigue performance, high damage tolerance and the like, so that the composite material has wide application in the fields of aerospace, automobile manufacturing and the like.
The fiber laminate is mainly characterized by a multilayer interface, and the existence of the multilayer interface enables the fiber laminate to be easily layered and cracked in use, so that the weak link of the fiber laminate is poor in interlayer performance. Aircraft complex
The composite material main bearing structural member is usually under the action of external low-speed impact load in use, and severe invisible delamination damage can be formed inside the laminated plate composite material due to low-speed impact; in designing a laminate composite material to be lightweight, it is necessary to consider that, after the outer layer of the laminate composite material fails to set, a peeling load is generated between the outer layer and the inner reinforcing material which have failed, and the strength of the laminate composite material is influenced and determined by the peeling. The presence of delamination may cause a reduction in the structural strength and stiffness of the laminate composite such that the performance of the laminate composite is not fully exploited. Therefore, the study of the interfacial properties of laminate composites, and the improvement of their interlaminar strength, is a problem that must be addressed for the performance and use of other strength functions of laminate composites.
The I-type interlaminar fracture toughness test can be used for determining a design allowable value, and is a research method for researching the interface performance of the laminated plate composite material and improving the interlaminar strength of the laminated plate composite material.
At present, a Double Cantilever Beam (DCB) test method is commonly adopted for testing the fracture toughness of the I-type layer, a tester can realize control of the position of a test piece and guarantee load centering when the test piece is pulled through adjusting a clamp, the current clamp can only realize unidirectional rotation, the flexibility of the clamp is greatly reduced, test load centering is inconvenient to carry out, great inconvenience is brought to the tester for adjusting the position of the test piece, and if the test piece is not centered, important influence is generated on an experimental result. Although the chinese patent 201410805431.5 "a composite material i-type layer fracture toughness test fixture" solves the problems of many repetitive operations, high test labor intensity, easy fatigue of the tester and long test preparation time of the tester, the problem of centering of the test piece still needs to be improved.
Disclosure of Invention
For solving the technical problem, the utility model provides a high efficiency anchor clamps that is used for I type layer of combined material to split toughness test, fundamentally has solved the problem of sample position centering in the experimentation, has also made things convenient for the experimenter to adjust the test piece position, and its structural design is compact, and the centering easy operation to the accuracy of experimental result has been ensured.
The utility model discloses the technical scheme who adopts as follows:
the utility model provides a anchor clamps suitable for I type of combined material layer is cracked toughness test, includes symmetrical distribution's last anchor clamps and lower anchor clamps, goes up anchor clamps and all includes connecting device and clamp splice down, and connecting device and clamp splice pass through the universal joint and connect, connecting device and universal joint pass through tapered roller bearing and connect (be equipped with tapered roller bearing between connecting device and the universal joint.)
The connecting device is connected with the mechanical property testing machine, is in a cylindrical shape and is directly connected with a chuck of the universal testing machine.
The clamping blocks are connected with the test piece through positioning pins.
The utility model discloses anchor clamps's beneficial effect is: the bearing is arranged between the connecting device and the universal joint, after the clamp is locked by the testing machine, the clamp rotates on the horizontal plane, the alignment position of the clamp is convenient to be connected with a test piece, the clamp is convenient to be connected with the test piece, and the time for adjusting the clamp is saved; the utility model discloses in the universal joint that sets up, can make anchor clamps rotate with two directions of horizontal plane vertically, make things convenient for the centering of test piece to adjust, very big improvement test efficiency. The clamp is compact in size, convenient to install, time-saving and labor-saving. The accurate positioning of the sample can be realized, the direction of a chuck of the testing machine can be quickly adapted, the testing time is saved, and the clamp is light and convenient.
Drawings
The invention is further described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is a front view of the present invention;
FIG. 3 is a schematic structural view of a universal joint device of the clamp of the present invention;
FIG. 4 is a schematic structural view of a test piece positioning pin in the fixture of the present invention;
fig. 5 is a schematic structural view of a test piece clamping block in the clamp of the present invention.
The sequence numbers in FIG. 1 illustrate: the test device comprises a connecting device 1, a sealing cover 2, a bearing 3, a universal joint 4, a clamping block 5, a positioning pin 6 and a test piece 7.
Detailed Description
The technical scheme of the invention will be further detailed with reference to the attached drawings as follows:
example 1
As shown in attached figures 1-5, the high-efficiency clamp for the I-type layer fracture toughness test of the composite material comprises an upper clamp and a lower clamp, wherein the upper clamp and the lower clamp are symmetrically distributed, the upper clamp and the lower clamp comprise a connecting device 1 and a clamping block 5, the connecting device 1 and the clamping block 5 are connected through a universal joint 4, a tapered roller bearing is arranged between the connecting device 1 and the universal joint 4, and the tapered roller bearing is installed at the lower end of the connecting device 1. The connecting device 1 is connected with a mechanical property testing machine, and the connecting device 1 is in a cylindrical shape and is directly connected with a chuck of a universal testing machine.
The clamping block 5 and the test piece 7 are connected through a positioning pin 6.
When an interlaminar fracture toughness test is carried out, the specific working process of the clamp is as follows:
firstly, a connecting device 1 is clamped by a chuck of a testing machine, then universal joints 4 on the outer sides of bearings 3 of an upper clamp and a lower clamp are respectively rotated, the horizontal position of a clamping block 5 is adjusted to a proper position, a positioning pin 6 is inserted into the clamping block 5 of the upper clamp (the chuck of the clamping block 5), a test piece is fixed, then the spatial position (two directions vertical to the horizontal plane) of the clamping block 5 is adjusted through the universal joints 4 of the upper clamp and the lower clamp, the test piece and the clamps are conveniently centered, and after all the positions are adjusted, the positioning pin 6 is inserted into the clamping block 5 of the lower clamp, so that the test can be started.
Claims (3)
1. The utility model provides a anchor clamps suitable for I type interlaminar fracture toughness test of combined material which characterized in that: including last anchor clamps and lower anchor clamps, go up anchor clamps and all include connecting device (1) and clamp splice (5) down, connecting device (1) and clamp splice (5) are connected through universal joint (4), connecting device (1) and universal joint (4) are connected through bearing (3).
2. The clamp suitable for the I-type layer fracture toughness test of the composite material as claimed in claim 1, wherein: the connecting device (1) is connected with the mechanical property testing machine, and the connecting device (1) is cylindrical.
3. The clamp suitable for the I-type layer fracture toughness test of the composite material as claimed in claim 1, wherein: the clamping block (5) is connected with the test piece through a positioning pin (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920722154.XU CN209927599U (en) | 2019-05-20 | 2019-05-20 | Anchor clamps suitable for I type bed crack toughness test of combined material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920722154.XU CN209927599U (en) | 2019-05-20 | 2019-05-20 | Anchor clamps suitable for I type bed crack toughness test of combined material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209927599U true CN209927599U (en) | 2020-01-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920722154.XU Active CN209927599U (en) | 2019-05-20 | 2019-05-20 | Anchor clamps suitable for I type bed crack toughness test of combined material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209927599U (en) |
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2019
- 2019-05-20 CN CN201920722154.XU patent/CN209927599U/en active Active
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