CN210051636U - Tensile compression test fixture - Google Patents
Tensile compression test fixture Download PDFInfo
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- CN210051636U CN210051636U CN201920504537.XU CN201920504537U CN210051636U CN 210051636 U CN210051636 U CN 210051636U CN 201920504537 U CN201920504537 U CN 201920504537U CN 210051636 U CN210051636 U CN 210051636U
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- 238000012669 compression test Methods 0.000 title claims abstract description 9
- 238000012360 testing method Methods 0.000 claims abstract description 23
- 238000000926 separation method Methods 0.000 claims abstract description 19
- 230000001788 irregular Effects 0.000 claims description 34
- 229910001095 light aluminium alloy Inorganic materials 0.000 claims description 4
- 239000002905 metal composite material Substances 0.000 claims description 3
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 2
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 2
- 229920000049 Carbon (fiber) Polymers 0.000 abstract description 27
- 239000004917 carbon fiber Substances 0.000 abstract description 27
- 239000002131 composite material Substances 0.000 abstract description 27
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 26
- 238000005452 bending Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 238000004381 surface treatment Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000009864 tensile test Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004918 carbon fiber reinforced polymer Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 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 technical field of test equipment is used in mechanical properties test, a tensile compression test anchor clamps is disclosed. The connecting device comprises an eye end, a first connecting body and a second connecting body, and the clamping device comprises a separating clamping piece and a clamping ring. The utility model is provided with the knuckle bearing at the eye end, and the knuckle bearing provides complete three degrees of freedom, thereby preventing the influence of bending and twisting load on the test accuracy during the test; the shapes of the inner surface of the separation clamping piece and the outer surface of the tensioning plug are subjected to curved surface treatment, so that the separation clamping piece is more closely attached to a carbon fiber composite circular tube, and the phenomenon that a joint device falls off and is pulled out in the test process due to the stress concentration effect caused by sudden change of the part near the tail end of the carbon fiber composite circular tube is reduced; the tensioning plug is separated from the joint device, so that the radial collapse of the end head of the carbon fiber composite circular tube can be prevented.
Description
Technical Field
The utility model belongs to the technical field of test equipment is used in mechanical properties test, concretely relates to tensile compression test anchor clamps.
Background
Carbon Fiber Reinforcement (CFRP), a material with great potential, is a common material for structural engineer and designer component design. The carbon fiber composite round tube is a typical product in the application of carbon fiber materials, has more advantages than a metal round tube in the aspects of specific strength, specific modulus, linear expansion coefficient, corrosion resistance, fatigue resistance, damping coefficient and the like, becomes an important structural material, is widely used for manufacturing mechanical roll shafts, high-precision checking tools, optical remote sensors, various equipment supports and the like, and has a better application prospect in the fields of light-weight industrial equipment, unmanned aerial vehicles, medical instruments, sports leisure and the like.
For the components only bearing tensile and compressive unidirectional loads, a unidirectional carbon fiber composite circular tube can be selected, and the unidirectional carbon fiber composite has high-uniformity section moment of inertia and a simple section, so that the unidirectional carbon fiber composite is beneficial to manufacturing. And testing the tensile and compressive properties of the composite circular tube according to the design requirements. The testing research on various performances of the carbon fiber composite circular tube is not much at home and abroad, the design of a clamp for testing the carbon fiber composite circular tube is particularly important, and the design of the integral equivalent strength of a test joint is a main problem at present.
SUMMERY OF THE UTILITY MODEL
For overcoming the shortcomings existing in the prior art, the utility model aims to provide a tensile compression test fixture.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a tensile compression test clamp comprises a joint device, a tensioning plug and a clamping device, wherein the joint device comprises an eye end, a first connecting body and a second connecting body, the clamping device comprises at least one group of separating clamping pieces and clamping rings;
the eye end is composed of two sections: one section is an irregular segment, the other section is an irregular round table, the two opposite sides of the irregular segment are tangent planes parallel to the axis of the segment (namely the irregular segment is formed by vertically cutting a segment from top to bottom on the two opposite sides of the segment), the two opposite sides of the irregular round table are tangent planes parallel to the axis of the round table (namely the irregular round table is formed by vertically cutting a round table from top to bottom on the two opposite sides of the segment), and the center of the irregular segment is provided with a circular through hole; the first connecting body and the second connecting body are both cylindrical, the diameter of the first connecting body is larger than that of the second connecting body, and external threads are arranged outside the first connecting body; the bottom of the irregular segment is matched with the large end of the irregular round table and is butted with the large end of the irregular round table to be integrally formed, the small end of the irregular round table is integrally formed with one end of the first connecting body, and the other end of the first connecting body is integrally formed with one end of the second connecting body;
the tensioning plug also consists of two sections: one section is a circular table, and the other section is a cylinder with the same diameter as the small end of the circular table; the tensioning plug is provided with an axial through hole, and the size of the axial through hole is matched with the diameter of the second connecting body;
each group of the separation clamping pieces consists of two half-split hollow circular truncated cones (namely each group of the separation clamping pieces consists of two clamping pieces formed by vertically cutting one hollow circular truncated cone from top to bottom along the axis of the hollow circular truncated cone); the clamping ring comprises a circular cylinder, one end of the circular cylinder is provided with an internal thread annular groove matched with the connecting body, the other end of the circular cylinder is provided with a circular truncated cone-shaped through hole, the large end of the circular truncated cone-shaped through hole is communicated with the internal thread annular groove, and the size of the circular truncated cone-shaped through hole is matched with the external size of the separation clamping piece from the large end to the middle part;
the round through hole of the irregular segment is internally provided with a joint bearing matched with the irregular segment, and the outer surface of the tensioning plug and the inner surface of the separation clamping piece are matched curved surfaces.
Preferably, the small end of the eye end irregular round table is smoothly transited to one end of the connector and is integrally formed with the connector.
Preferably, both ends of the clamp ring are rounded.
Preferably, the eye end, the first connector, the second connector, the tensioning plug, the separating clamping piece and the clamping ring are all made of one of high-strength alloy steel or high-modulus metal composite materials.
Preferably, the high modulus metallic composite is titanium alloy tc4, aircraft aluminum 7050, or aircraft aluminum 7075.
Has the advantages that:
1. the utility model is provided with the knuckle bearing at the eye end, and the knuckle bearing provides complete three degrees of freedom, thereby preventing the influence of bending and twisting load on the test accuracy during the test;
2. the shapes of the inner surface of the separation clamping piece and the outer surface of the tensioning plug are subjected to curved surface treatment, so that the separation clamping piece is more closely attached to a carbon fiber composite circular tube, and the phenomenon that a joint device falls off and is pulled out in the test process due to the stress concentration effect caused by sudden change of the part near the tail end of the carbon fiber composite circular tube is reduced;
3. the tensioning plug and the connector device are separated and fixed to the end of the carbon fiber composite circular tube by using an adhesive, so that the end of the carbon fiber composite circular tube can be prevented from radially collapsing;
4. the design of the tensioning plug and the clamping ring can ensure that the load applied by the mechanical testing machine is transmitted along the axial direction of the carbon fiber composite material circular tube, and can effectively eliminate the test error caused by the damage of a joint in the test; the clamp ring bears axial and circumferential tensile loads simultaneously, the connecting strength of the clamp and the carbon fiber composite material circular tube is higher than the tensile and compression strength of the carbon fiber composite material circular tube, and the clamping requirement of a tensile and compression test sample of the carbon fiber composite material circular tube is met;
5. the separation clamping pieces can be flexibly matched with the carbon fiber composite circular tubes, the number of the separation clamping pieces can be set to be more than two groups for replaceable universal parts, and corresponding separation clamping pieces can be prepared according to different test standard requirements and the size specification of a standard sample.
Drawings
FIG. 1: a front view structure schematic diagram of the joint device;
FIG. 2: the left side view structure schematic diagram of the joint device;
FIG. 3: a schematic top view structure of the joint device;
FIG. 4: the A-A direction of the schematic sectional structure of FIG. 1;
FIG. 5: a front view structure schematic diagram of the tensioning plug;
FIG. 6: a schematic view of a top view structure of the tensioning plug;
FIG. 7: FIG. 5 is a schematic sectional view in section B-B;
FIG. 8: a front view structure diagram of one of the split jaws;
FIG. 9: a schematic top view of one of the set of breakaway clips;
FIG. 10: a front view structure schematic diagram of the clamping ring;
FIG. 11: a left side view structure schematic diagram of the clamping ring;
FIG. 12: FIG. 10 is a schematic cross-sectional view taken along line C-C;
FIG. 13: the front view structure schematic diagram of the joint bearing;
FIG. 14: FIG. 13 is a schematic sectional view taken along line D-D;
FIG. 15: the utility model is a schematic diagram of the structure of the using state;
FIG. 16: FIG. 15 is a schematic sectional view (enlarged) taken along line E-E;
wherein: 1-eye end, 11-irregular segment, 111-circular through hole and 12-irregular round table; 21-linker one, 22-linker two; 3-a tensioning plug, 31-a circular truncated cone, 32-a cylinder and 33-an axial through hole; 4-separating the clamping piece; 5-clamping ring, 51-internal thread annular groove, 52-circular truncated cone through hole; 6-knuckle bearing; 7-carbon fiber composite round tube.
Detailed Description
The technical solution of the present invention will be described in detail and clearly with reference to the following embodiments, but the scope of the present invention is not limited thereto.
Example 1
As shown in fig. 1-14, a tensile and compression test fixture comprises a joint device, a tensioning plug 3 and a clamping device, wherein the joint device comprises an eye end 1, a first connecting body 21 and a second connecting body 22, the clamping device comprises two split clamping pieces 4 and two clamping rings 5, and the number of the split clamping pieces 4 is two; the eye end 1 consists of two sections: one section is an irregular segment 11, the other section is an irregular round table 12, two opposite sides of the irregular segment 11 are tangent planes parallel to the axis of the segment, two opposite sides of the irregular round table 12 are tangent planes parallel to the axis of the round table, and the center of the irregular segment 11 is provided with a circular through hole 111; the first connecting body 21 and the second connecting body 22 are both cylindrical, the diameter of the first connecting body 21 is larger than that of the second connecting body 22, and external threads are arranged on the outer portion of the first connecting body 21; the bottom of the irregular segment 11 is matched with the large end of the irregular round table 12 and is butted and integrally formed, the small end of the irregular round table 12 is smoothly transited to one end of the first connecting body 21 and is integrally formed, and the other end of the first connecting body 21 and one end of the second connecting body 22 are integrally formed; the tensioning plug 3 also consists of two sections: one section is a circular table 31, and the other section is a cylinder 32 with the same diameter as the small end of the circular table 31; the tensioning plug 3 is provided with an axial through hole 33, and the size of the axial through hole 33 is matched with the diameter of the second connecting body 22; each group of the separation clamping pieces 4 consists of two half-split hollow round tables 31; the clamping ring 5 comprises a circular cylinder, two ends of the circular cylinder are in an inverted fillet shape, one end of the circular cylinder is provided with an internal thread annular groove 51 matched with the connector, the other end of the circular cylinder is provided with a circular truncated cone-shaped through hole 52, the large end of the circular truncated cone-shaped through hole 52 is communicated with the internal thread annular groove 51, and the size of the circular truncated cone-shaped through hole 52 is matched with the external dimension of the separation clamping piece 4 from the large end to the middle part; the spherical segment 11 is provided with a spherical through hole 111 in which a joint bearing 6 is arranged, and the outer surface of the tensioning plug 3 and the inner surface of the separation clamping piece 4 are matched curved surfaces. The eye end 1, the first connecting body 21, the second connecting body 22, the tensioning plug 3, the separating clamping piece 4 and the clamping ring 5 are all made of aviation aluminum 7050 or aviation aluminum 7075.
As shown in fig. 15-16, when in use, two groups of test fixtures are needed, two ends of a carbon fiber composite circular tube 7 are respectively sleeved with a clamping ring 5 in advance, then two eye ends 1 are respectively connected with an upper arm and a lower arm of a tensile machine through a circular through hole 111 and a joint bearing 6, after the tensioning plugs 3 of two joint devices are sleeved outside a second connecting body 22, an adhesive (3 MDEEC 2216) is coated on the outer surfaces of the tensioning plugs and extends into two ends of the carbon fiber composite circular tube 7 (the two ends of the carbon fiber composite circular tube 7 are extruded by the tensioning plugs 3 to be tightly attached to the outer surface of the tensioning plugs 3), then separation clamping pieces 4 are respectively sleeved outside two ends of the carbon fiber composite circular tube 7, the clamping ring 5 is sleeved outside the separation clamping pieces 4 (an internal thread annular groove 51 of the clamping ring 5 is sleeved outside the first connecting body 21, and a circular table-shaped through, the joint device and the carbon fiber composite material circular tube 7 are connected through the clamping ring 5, and then the tensile compression performance of the carbon fiber composite material circular tube 7 is measured by applying force to a tensile machine and transmitting tensile axial load.
Claims (5)
1. The utility model provides a tensile compression test anchor clamps which characterized in that: the device comprises a joint device, a tensioning plug and a clamping device, wherein the joint device comprises an eye end, a first connecting body and a second connecting body, the clamping device comprises at least one group of separating clamping pieces and clamping rings;
the eye end is composed of two sections: one section is an irregular spherical segment, the other section is an irregular round table, the two opposite sides of the irregular spherical segment are tangent planes parallel to the axis of the spherical segment, the two opposite sides of the irregular round table are tangent planes parallel to the axis of the round table, and the center of the irregular spherical segment is provided with a circular through hole; the first connecting body and the second connecting body are both cylindrical, the diameter of the first connecting body is larger than that of the second connecting body, and external threads are arranged outside the first connecting body; the bottom of the irregular segment is matched with the large end of the irregular round table and is butted with the large end of the irregular round table to be integrally formed, the small end of the irregular round table is integrally formed with one end of the first connecting body, and the other end of the first connecting body is integrally formed with one end of the second connecting body;
the tensioning plug also consists of two sections: one section is a circular table, and the other section is a cylinder with the same diameter as the small end of the circular table; the tensioning plug is provided with an axial through hole, and the size of the axial through hole is matched with the diameter of the second connecting body;
each group of the separation clamping pieces consists of two half-split hollow round tables; the clamping ring comprises a circular cylinder, one end of the circular cylinder is provided with an internal thread annular groove matched with the connecting body, the other end of the circular cylinder is provided with a circular truncated cone-shaped through hole, the large end of the circular truncated cone-shaped through hole is communicated with the internal thread annular groove, and the size of the circular truncated cone-shaped through hole is matched with the external size of the separation clamping piece from the large end to the middle part;
the round through hole of the irregular segment is internally provided with a joint bearing matched with the irregular segment, and the outer surface of the tensioning plug and the inner surface of the separation clamping piece are matched curved surfaces.
2. The tensile-compressive test fixture of claim 1, wherein: the small end of the eye end irregular round table is smoothly transited to one end of the connecting body and is integrally formed with the connecting body.
3. The tensile-compressive test fixture of claim 1, wherein: both ends of the clamping ring are in a shape of a rounded horn.
4. The tensile-compressive test fixture of claim 1, wherein: the eye end, the first connecting body, the second connecting body, the tensioning plug, the separating clamping piece and the clamping ring are all made of one of high-strength alloy steel or high-modulus metal composite materials.
5. The tensile-compressive test fixture of claim 4, wherein: the high modulus metal composite is titanium alloy tc4, aircraft aluminum 7050 or aircraft aluminum 7075.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920504537.XU CN210051636U (en) | 2019-04-15 | 2019-04-15 | Tensile compression test fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920504537.XU CN210051636U (en) | 2019-04-15 | 2019-04-15 | Tensile compression test fixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210051636U true CN210051636U (en) | 2020-02-11 |
Family
ID=69380179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920504537.XU Active CN210051636U (en) | 2019-04-15 | 2019-04-15 | Tensile compression test fixture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210051636U (en) |
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2019
- 2019-04-15 CN CN201920504537.XU patent/CN210051636U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20220531 Address after: 450000 building E3, No. 60, Huashan Road, Zhongyuan District, Zhengzhou City, Henan Province Patentee after: Fanrui Yunzhi Technology (Zhengzhou) Co.,Ltd. Address before: Room 12505, unit 1, building 2, No. 7, Gaoxin 1st Road, high tech Zone, Yanta District, Xi'an, Shaanxi 710075 Patentee before: XI'AN RESPRO APPLIED MATERIALS CO.,LTD. |