CN219657294U - SENB test piece prefabricated crack device - Google Patents
SENB test piece prefabricated crack device Download PDFInfo
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- CN219657294U CN219657294U CN202321089900.9U CN202321089900U CN219657294U CN 219657294 U CN219657294 U CN 219657294U CN 202321089900 U CN202321089900 U CN 202321089900U CN 219657294 U CN219657294 U CN 219657294U
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- test piece
- blade
- senb
- concave groove
- base
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- 238000012360 testing method Methods 0.000 title claims abstract description 55
- 238000005336 cracking Methods 0.000 claims description 7
- 239000002131 composite material Substances 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 4
- 238000007656 fracture toughness test Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 239000007799 cork Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model belongs to the field of composite material shear mechanics tests, and provides a SENB test piece pre-fabricated crack device. Comprising the following steps: a base, a concave groove and a blade; the concave groove is detachably connected with the base; a test piece placing cavity is arranged in the concave groove and is used for placing a SENB test piece; blade grooves are formed in two sides of the test piece placing cavity; the blade is nested in the blade groove, and when the novel SENB test piece is used, a fixed SENB test piece can be cracked only by lightly knocking the blade through a hammer.
Description
Technical Field
The utility model relates to the field of composite material shear mechanics tests, in particular to a SENB test piece pre-fabricated crack device.
Background
SENB (single edge notched beam) test pieces are commonly used in the testing of fracture toughness, which refers to the toughness property of a material against crack propagation fracture, which is one of the important indicators of the mechanical properties of the material.
At present, a test piece forming mode of a high polymer material I-type fracture toughness testing operation mainly comprises the steps of firstly casting and forming a test piece with a rectangular structure through a die, then forming a notch with a conical bottom on one long side (usually in the middle of the long side) of the test piece, then inserting a single-sided blade into the conical bottom of the notch, and finally lightly knocking the back surface of the blade by adopting tools such as a cork hammer and the like to obtain a crack on the test piece at the bottom of the notch.
Chinese patent 201621300525.8 discloses a macromolecular material type I fracture toughness test piece forming die, including the mould body, at least one test piece die cavity has been seted up with the indent mode on the mould body, forming die still includes the blade that corresponds the test piece die cavity, the cutting edge of blade extends to the inside of test piece die cavity from the limit portion wall of test piece die cavity, the test piece die cavity is used for casting macromolecular material into the test piece body that fracture toughness tested, the blade is used for obtaining fracture toughness test's crackle on the test piece body.
However, in the prior art, the device has a complex structure and is inconvenient to use, so that a fracture toughness test piece forming device with a simple structure and convenient use is needed.
Disclosure of Invention
In order to solve the technical problems of complex structure and inconvenient use of the device in the prior art. The utility model provides a SENB test piece pre-cracking device, which comprises: a base, a concave groove and a blade;
the concave groove is detachably connected with the base;
a test piece placing cavity is arranged in the concave groove and used for placing a SENB test piece;
blade grooves are formed in two sides of the test piece placing cavity;
the blade is nested within the blade slot.
Preferably, a plurality of first threaded holes are formed in the central portion of the bottom of the base.
Preferably, the bottom of the concave groove is provided with a plurality of second threaded holes;
the second threaded hole corresponds to the first threaded hole.
Preferably, the device further comprises a locking screw; the locking screw penetrates through the first threaded hole and the second threaded hole to connect and fix the concave groove and the base.
Preferably, the thickness of the blade groove is 0.23 mm-0.27 mm, wherein the height is the length of the cracked grain plus the height of the blade.
The utility model can solve the technical problems of complex structure and inconvenient use in the prior art, and the fixed SENB test piece can be cracked by only lightly knocking the blade through a hammer when the SENB test piece is fixed in the test piece placing cavity.
Drawings
Fig. 1 is a schematic structural view of embodiment 1;
FIG. 2 is a front view of a SENB test piece pre-crack device without a blade;
FIG. 3 is a schematic diagram of the structure after fixing the SENB test piece;
FIG. 4 is a schematic plan view of a base;
FIG. 5 is a plan view of an uncracked SENB specimen;
FIG. 6 is a plan view of the SENB specimen after cracking.
In the above drawings, each reference numeral indicates:
1. base seat
2. Concave groove
2-1, blade groove
2-2, test piece placing cavity
3. Blade
4. Locking screw
5. SENB test piece
Detailed Description
The technical scheme of the present utility model will be further described in detail with reference to examples, but embodiments of the present utility model are not limited thereto.
Example 1
In a specific embodiment, as shown in fig. 1 and 2, it includes: the device comprises a base 1, a concave groove 2 and a blade 3, wherein the concave groove 2 is detachably connected with the base 1, a test piece placing cavity 2-2 is arranged in the concave groove 2 and is used for placing a SENB test piece, blade grooves 2-1 are formed in two sides of the test piece placing cavity 2-2, the blade 3 is nested in the blade grooves 2-1, in the embodiment, the thickness of the blade grooves 2-1 is 0.25mm, and the height is the length of an opened crack plus the height of the blade 3.
In this embodiment, two second threaded holes (not shown) are provided at the bottom of the concave groove 2, and two first threaded holes (not shown) are provided at the central portion of the base 1, where the two second threaded holes correspond to the two first threaded holes. As shown in fig. 4, the concave groove 2 and the base 1 are connected and fixed through two first screw holes and two second screw holes by two locking screws 4.
When the device is used for manufacturing cracks of the SENB test piece 5, the SENB test piece is placed in the test piece placing cavity 2-2, the SENB test piece 5 is shown in fig. 5, a worker sticks the SENB test piece 5 to the test piece placing cavity 2-2, fixes the SENB test piece 5, puts the blade 3, and opens the fixed SENB test piece 5 into the cracks by lightly knocking the blade 3 with a hammer, as shown in fig. 6.
In a preferred embodiment, the thickness of the insert pocket 2-1 is 0.23mm to 0.27mm, which can be applied to inserts 3 of different thicknesses.
Example 2
In the embodiment 2, a first threaded hole is formed in the central portion of the bottom of the base 1, and a second threaded hole is formed in the bottom of the concave groove 2; the second threaded hole corresponds with the first threaded hole, and the first threaded hole sets up in the positive central point position of base 1, and the second threaded hole sets up the positive central point position of concave groove 2, and locking screw 4 passes first threaded hole and second threaded hole and connects and fix concave groove 2 and base 1. The mounting manner of the remaining components is the same as that of embodiment 1, and will not be described here too much.
The principles and embodiments of the present utility model have been described in detail in this application, the foregoing is a preferred embodiment of the present utility model and is not intended to limit the scope of the utility model. All equivalent modifications and improvements made according to the inventive concept should be considered to be within the scope of the utility model.
Claims (5)
1. A SENB test piece pre-cracking device, comprising: a base, a concave groove and a blade;
the concave groove is detachably connected with the base;
a test piece placing cavity is arranged in the concave groove and used for placing a SENB test piece;
blade grooves are formed in two sides of the test piece placing cavity;
the blade is nested within the blade slot.
2. The SENB test piece pre-cracking device according to claim 1, wherein a plurality of first threaded holes are formed in the central portion of the bottom of the base.
3. The SENB test piece pre-cracking device according to claim 2, wherein a plurality of second threaded holes are formed in the bottom of the concave groove;
the second threaded hole corresponds to the first threaded hole.
4. A SENB test piece pre-cracking device according to claim 3, further comprising a locking screw; the locking screw penetrates through the first threaded hole and the second threaded hole to connect and fix the concave groove and the base.
5. The SENB test piece pre-cracking device according to claim 1, wherein the thickness of the blade groove is 0.23 mm-0.27 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321089900.9U CN219657294U (en) | 2023-05-09 | 2023-05-09 | SENB test piece prefabricated crack device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321089900.9U CN219657294U (en) | 2023-05-09 | 2023-05-09 | SENB test piece prefabricated crack device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219657294U true CN219657294U (en) | 2023-09-08 |
Family
ID=87853184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321089900.9U Active CN219657294U (en) | 2023-05-09 | 2023-05-09 | SENB test piece prefabricated crack device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219657294U (en) |
-
2023
- 2023-05-09 CN CN202321089900.9U patent/CN219657294U/en active Active
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