CN210051637U - Test fixture for testing tensile compression performance of carbon fiber composite circular tube - Google Patents
Test fixture for testing tensile compression performance of carbon fiber composite circular tube Download PDFInfo
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- CN210051637U CN210051637U CN201920504539.9U CN201920504539U CN210051637U CN 210051637 U CN210051637 U CN 210051637U CN 201920504539 U CN201920504539 U CN 201920504539U CN 210051637 U CN210051637 U CN 210051637U
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Abstract
The utility model belongs to the technical field of test equipment is used in mechanical properties test, a carbon-fibre composite pipe tensile compression property test is with test fixture is disclosed. The clamping device comprises at least one group of separating clamping pieces and clamping rings. The utility model discloses in, the design of tensioning stopper and clamp ring can ensure that the load that mechanical testing machine applyed transmits along carbon-fibre composite pipe axial direction, can eliminate the test error that the joint damage in the test brought effectively.
Description
Technical Field
The utility model belongs to the technical field of test equipment is used in mechanical properties test, concretely relates to carbon-fibre composite pipe test fixture is used in tensile compression performance test.
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 weak point that exists among the prior art, the utility model aims at providing a carbon-fibre composite pipe test fixture for tensile compression performance test.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a test fixture for testing tensile and compressive properties of a carbon fiber composite circular tube comprises a connector device and a clamping device, wherein the connector device comprises an eye end, a connector and a tensioning plug, the clamping device comprises at least one group of separation clamping pieces and clamping rings, and the number of the separation clamping pieces is at least one group;
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 connecting body is cylindrical, and external threads are arranged on the outer part of the 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 bottom of the irregular segment is matched with the big end of the irregular round table and is butted and integrally formed, the small end of the irregular round table is integrally formed with one end of the connecting body, the other end of the connecting body is integrally formed with the big end of the round table of the tensioning plug, and the small end of the round table of the tensioning plug is matched with the cylinder of the tensioning plug, butted and integrally formed; the tensioning plug is provided with an axial through hole;
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.
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 connecting body, the tensioning plug, the separating clip and the clamping ringAll are high-strength alloy steels (tensile strength must be 50 kg/mm)
2Above) or high modulus metal composite.
Preferably, the high modulus metallic composite is titanium alloy tc4, aircraft aluminum 7050, or aircraft aluminum 7075.
Has the advantages that:
1. in the utility model, 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 round tube, and the testing error caused by the damage of the joint in the test can be effectively eliminated; 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;
2. 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 diagram of one of the split jaws;
FIG. 6: a schematic top view of one of the set of breakaway clips;
FIG. 7: a front view structure schematic diagram of the clamping ring;
FIG. 8: a left side view structure schematic diagram of the clamping ring;
FIG. 9: FIG. 7 is a schematic sectional view in cross section along line B-B;
FIG. 10: the utility model is a schematic diagram of the structure of the using state;
FIG. 11: FIG. 10 is a schematic sectional view (enlarged) in section C-C;
wherein: 1-eye end, 11-irregular segment, 111-circular through hole and 12-irregular round table; 2-a linker; 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-carbon fiber composite material 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 to 9, a test fixture for testing tensile and compressive properties of a carbon fiber composite circular tube comprises a connector device and a clamping device, wherein the connector device comprises an eye end 1, a connector 2 and a tensioning plug 3, the clamping device comprises two separating clamping pieces 4 and two clamping rings 5, and the number of the separating 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 connecting body 2 is cylindrical, and external threads are arranged on the outer part of the connecting body 2; 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 bottom of the irregular segment 11 is matched with and butted with the large end of the irregular round table 12 to be integrally formed, the small end of the irregular round table 12 is smoothly transited to one end of the connecting body 2 to be integrally formed with the connecting body, the other end of the connecting body 2 is integrally formed with the large end of the round table 31 of the tensioning plug 3, and the small end of the round table 31 of the tensioning plug 3 is matched with and butted with the cylinder 32 of the tensioning plug 3 to be integrally formed; the tensioning plug 3 is provided with an axial through hole 33; each group of the separation clamping pieces 4 consists of two half-split hollow round tables; the clamping ring 5 comprises a circular cylinder body, the two ends of the circular cylinder body are in an inverted fillet shape, one end of the circular cylinder body is provided with an internal thread annular groove 51 matched with the connector 2, the other end of the circular cylinder body 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 eye end 1, the connecting body 2, the tensioning plug 3, the separating clamping piece 4 and the clamping ring 5 are all made of aviation aluminum 7050.
As shown in fig. 10-11, when in use, two sets of test fixtures are required, two ends of a carbon fiber composite circular tube 6 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 circular through holes 111, tensioning plugs 3 of two connector devices are extended into two ends of the carbon fiber composite circular tube 6 (two ends of the carbon fiber composite circular tube 6 are extruded by the tensioning plugs 3 to be in a shape 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 6, 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 connector 2, a circular truncated cone-shaped through hole 52 of the clamping ring 5 is sleeved outside the separation clamping piece 4), the connector devices and the carbon fiber composite circular tube 6 are connected through the clamping ring 5, the tensile and compressive properties of the carbon fiber composite round tube 6 were measured by transmitting the tensile axial load.
Claims (5)
1. The utility model provides a carbon-fibre composite pipe tensile compression test of performance test anchor clamps which characterized in that: the connector comprises a connector device and a clamping device, wherein the connector device comprises an eye end, a connecting body and a tensioning plug, 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 connecting body is cylindrical, and external threads are arranged on the outer part of the 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 bottom of the irregular segment is matched with the big end of the irregular round table and is butted and integrally formed, the small end of the irregular round table is integrally formed with one end of the connecting body, the other end of the connecting body is integrally formed with the big end of the round table of the tensioning plug, and the small end of the round table of the tensioning plug is matched with the cylinder of the tensioning plug, butted and integrally formed; the tensioning plug is provided with an axial through hole;
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.
2. The test fixture for testing the tensile and compressive properties of the carbon fiber composite round tube as claimed in 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 test fixture for testing the tensile and compressive properties of the carbon fiber composite round tube as claimed in claim 1, wherein: both ends of the clamping ring are in a shape of a rounded horn.
4. The test fixture for testing the tensile and compressive properties of the carbon fiber composite round tube as claimed in claim 1, wherein: the eye end, the 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 test fixture for testing the tensile and compressive properties of the carbon fiber composite round tube as claimed in 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 |
|---|---|---|---|
| CN201920504539.9U CN210051637U (en) | 2019-04-15 | 2019-04-15 | Test fixture for testing tensile compression performance of carbon fiber composite circular tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920504539.9U CN210051637U (en) | 2019-04-15 | 2019-04-15 | Test fixture for testing tensile compression performance of carbon fiber composite circular tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210051637U true CN210051637U (en) | 2020-02-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920504539.9U Active CN210051637U (en) | 2019-04-15 | 2019-04-15 | Test fixture for testing tensile compression performance of carbon fiber composite circular tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210051637U (en) |
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2019
- 2019-04-15 CN CN201920504539.9U patent/CN210051637U/en active Active
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| GR01 | Patent grant | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20220615 Address after: 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. |
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