CN112179759A - Sandwich structure material compression shear test fixture - Google Patents
Sandwich structure material compression shear test fixture Download PDFInfo
- Publication number
- CN112179759A CN112179759A CN202011028866.5A CN202011028866A CN112179759A CN 112179759 A CN112179759 A CN 112179759A CN 202011028866 A CN202011028866 A CN 202011028866A CN 112179759 A CN112179759 A CN 112179759A
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- China
- Prior art keywords
- test piece
- piece chuck
- sandwich structure
- structure material
- limiting adapter
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- Pending
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- 238000012360 testing method Methods 0.000 title claims abstract description 113
- 239000000463 material Substances 0.000 title claims abstract description 27
- 238000007906 compression Methods 0.000 title claims abstract description 24
- 230000006835 compression Effects 0.000 title claims abstract description 21
- 230000003014 reinforcing effect Effects 0.000 claims description 12
- 239000002131 composite material Substances 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 4
- 238000010008 shearing Methods 0.000 abstract description 4
- 238000005452 bending Methods 0.000 description 1
- 238000012669 compression test Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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Classifications
-
- 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
-
- 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
- G01N2203/0025—Shearing
-
- 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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/04—Chucks, fixtures, jaws, holders or anvils
- G01N2203/0423—Chucks, fixtures, jaws, holders or anvils using screws
-
- 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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/04—Chucks, fixtures, jaws, holders or anvils
- G01N2203/0435—Chucks, fixtures, jaws, holders or anvils modifying the type of the force applied, e.g. the chuck transforms a compressive machine for applying a bending test
Landscapes
- 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)
Abstract
The invention belongs to the technical field of honeycomb sandwich structure composite material tests, and discloses a clamp for a compression-shear test of sandwich structure materials. The clamping device is suitable for all tension-compression unidirectional loading testing machines, different angles and loading of load sizes are realized through the clamping device, the specific realization method is that angle change can be realized through two groups of symmetrical clamps, so that unidirectional tension-compression loading is converted into oblique shearing load, the proportion of the shearing load and the compression load is changed through rotation of one group of clamps, and compression-shearing load application under different conditions is realized.
Description
Technical Field
The invention belongs to the technical field of honeycomb sandwich structure composite material tests, and relates to a clamp for a compression-shear test of sandwich structure materials.
Background
The honeycomb sandwich composite material is applied to the existing helicopter skin structure in a large amount due to the fact that the honeycomb sandwich composite material has high specific strength and specific stiffness and has strong repairability. The load types borne by the honeycomb sandwich composite material applied to different parts are also greatly different, and the common load types comprise bending load, shearing load, compression-shear composite load and the like.
The test method for testing the bearing capacity of the honeycomb sandwich composite material plate with different materials or defects is a necessary step in the research process of the bearing capacity of the material, under the condition that a compression shear load is loaded, a clamp clamps a test piece in the loading process for loading, a common clamp is generally customized according to the structure of the test piece to adapt to the size of the test piece and a loading tester, sometimes even test equipment needs to be modified to realize the application of the shear load, different shear loads need to be clamped by different sets of clamps, and the test cost is very high.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the clamping device for the honeycomb sandwich composite material plate compression shear test is composed of two groups of symmetrical inner and outer clamps, and a mutually-nested and limiting structure is designed for facilitating loading of a unidirectional loading testing machine and converting the loading into compression shear loads with different proportions so as to solve the problem that a specially-made clamping device is needed in the honeycomb sandwich composite material compression shear test.
Technical scheme of the invention
A clamp for a compression shear test of a sandwich structure material comprises: the device comprises an upper limiting adapter, a lower limiting adapter, an upper test piece chuck, a lower test piece chuck, a pretightening force bolt, a pretightening force nut and a locking nut;
the sandwich structure material is clamped between an upper test piece clamping head and a lower test piece clamping head; the upper test piece chuck and the lower test piece chuck are fixed through a pretightening force bolt and a pretightening force nut;
upper locking bolts are arranged at two ends of the top of the upper test piece chuck; the upper limiting adapter is fixed with a locking bolt on the upper test piece chuck through a locking nut;
the two ends of the top of the lower test piece chuck are provided with lower locking bolts; and the lower limiting adapter is fixed with a lower locking bolt on the lower test piece chuck through a locking nut.
Further, the bottoms of the upper test piece chuck and the lower test piece chuck are grooves; the sandwich structure material is clamped in the grooves of the upper test piece chuck and the lower test piece chuck.
Further, the jig further includes: an upper reinforcing sheet and a lower reinforcing sheet;
the upper reinforcing sheet is fixed between two side walls of the upper test piece chuck groove and the sandwich structure material;
the lower reinforcing sheet is fixed between two side walls of the lower test piece chuck groove and the sandwich structure material.
Further, the jig further includes: fastening a bolt;
threaded holes are formed in two side walls of the grooves of the upper test piece chuck and the lower test piece chuck;
the fastening bolt penetrates through the threaded hole to fix the reinforcing sheet.
Further, the jig further includes: fastening a bolt locking nut;
the fastening bolt locking nut is sleeved on the fastening bolt; and the fastening bolt locking nut is matched with two side walls of the grooves of the upper test piece chuck and the lower test piece chuck to lock the fastening bolt.
Further, the jig further includes: the upper limiting adapter and the lower limiting adapter are of semicircular groove structures; through holes are formed in two side walls of the semicircular grooves of the upper limiting adapter and the lower limiting adapter, the upper test piece chuck is arranged in the semicircular groove of the upper limiting adapter, and upper locking bolts at two ends of the upper test piece chuck penetrate through the through holes in the two side walls of the semicircular groove; the lower test piece chuck is arranged in a semicircular groove of the lower limiting adapter, and lower locking bolts at two ends of the lower test piece chuck penetrate through holes in two side walls of the semicircular groove; the locking nut is used for being matched with the side wall of the semicircular groove to fix the upper locking bolt and the lower locking bolt.
Further, through holes in two side walls of the semicircular grooves of the upper limiting adapter and the lower limiting adapter are arc-shaped through holes, and the radian of each arc-shaped through hole is identical to that of each semicircular groove;
the upper fastening bolt can slide in the arc-shaped through holes on the two side walls of the semicircular groove of the upper limiting adapter;
the lower fastening bolt can slide in the arc-shaped through holes in the two side walls of the semicircular groove of the lower limiting adapter.
Furthermore, bosses are arranged at the tops of the upper limiting adapter and the lower limiting adapter; the boss is used for being connected with the unidirectional tension and compression testing machine.
The invention has the advantages that: the clamp device is stable and reliable in structure and convenient to operate, can realize the loading of the compression-shear composite loads in different proportions only through a one-way tension-compression testing machine, does not need to repeatedly replace a special clamp, greatly reduces the tooling cost and improves the testing efficiency.
Drawings
FIG. 1 is a schematic view of a fixture according to the present invention;
FIG. 2 is a schematic view of a specimen clamping;
FIG. 3 is a schematic view of a specimen holder;
FIG. 4 is a schematic diagram of a limiting adapter
1-upper limiting adapter, 2-lower limiting adapter, 3-upper test piece chuck, 4-lower test piece chuck, 5-reinforcing sheet, 6-fastening bolt, 7-fastening bolt locking nut, 8-pretightening bolt, 9-pretightening nut, 10-test piece chuck locking nut and 11-limiting adapter locking nut mechanism.
Detailed Description
A clamp suitable for a compression shear test of a sandwich structure material is shown in figure 1 and comprises: go up spacing adapter 1, lower spacing adapter 2, go up test piece chuck 3, lower test piece chuck 4 strengthens piece 5, fastening bolt 6, fastening bolt lock nut 7, pretightning force bolt 8, pretightning force nut 9, test piece chuck lock nut 10, spacing adapter lock nut 11.
The invention is applied to the test of the press-shear composite load in the in-plane direction of the honeycomb sandwich panel, and the specific implementation method comprises the following steps:
1. the sandwich structure material test specimen is clamped by the upper specimen chuck and the lower specimen chuck, and the sandwich structure material test specimen can be used for test specimens with different thicknesses and sizes. The upper and lower specimen grips are shown in figure 3.
2. The four reinforcing pieces are respectively positioned between the test piece and two side walls of the groove of the upper test piece chuck and the two side walls of the groove of the lower test piece chuck, and the test piece of the sandwich structure material passes through the threaded holes of the side walls of the upper test piece chuck and the lower test piece chuck by the fastening bolt, is propped against the reinforcing pieces for fixing and is locked by the fastening bolt locking nut.
3. The upper test piece chuck and the lower test piece chuck are respectively arranged in the semicircular grooves of the upper limiting adapter and the lower limiting adapter, the locking bolts at the two ends of the upper test piece chuck and the lower test piece chuck penetrate through the through holes in the two side walls of the semicircular grooves of the upper limiting adapter and the lower limiting adapter to be assembled, and meanwhile, the pretightening force can be applied to the test piece through the pretightening force bolts at the opening parts of the upper limiting adapter and the lower limiting adapter according to test requirements before the angle is adjusted. The upper limit adapter and the lower limit adapter are shown in fig. 4.
4. And then, according to the required load application proportion, the upper test piece chuck and the lower test piece chuck are adjusted to the specified positions by the fastening bolts of the upper test piece chuck and the lower test piece chuck sliding in the arc-shaped through holes of the upper limiting adapter and the lower limiting adapter, the adjustment range is 0-90 degrees, and the upper test piece chuck and the lower test piece chuck are locked by the test piece chuck locking nuts after being adjusted to the specified positions. As shown in FIG. 2, the present invention can realize compression test, pure shear test and compression-shear combined load test.
5. And finally, installing the clamp on the unidirectional tension and compression testing machine through the bosses at the tops of the upper limiting adapter and the lower limiting adapter, and locking the clamp through a locking bolt of the limiting adapter.
6. The test loading can be started through the unidirectional tension and compression testing machine, and the strain gauge and other sensors can be added according to the test requirements to carry out auxiliary measurement.
Claims (8)
1. The utility model provides a sandwich structure material compression shear test anchor clamps which characterized in that: the jig includes: the device comprises an upper limiting adapter, a lower limiting adapter, an upper test piece chuck, a lower test piece chuck, a pretightening force bolt, a pretightening force nut and a locking nut;
the sandwich structure material is clamped between an upper test piece clamping head and a lower test piece clamping head; the upper test piece chuck and the lower test piece chuck are fixed through a pretightening force bolt and a pretightening force nut;
upper locking bolts are arranged at two ends of the top of the upper test piece chuck; the upper limiting adapter is fixed with a locking bolt on the upper test piece chuck through a locking nut;
the two ends of the top of the lower test piece chuck are provided with lower locking bolts; and the lower limiting adapter is fixed with a lower locking bolt on the lower test piece chuck through a locking nut.
2. The clamp for the compression shear test of the sandwich structure material according to claim 1, wherein:
the bottoms of the upper test piece chuck and the lower test piece chuck are grooves; the sandwich structure material is clamped in the grooves of the upper test piece chuck and the lower test piece chuck.
3. The clamp for the compression shear test of the sandwich structure material according to claim 1, wherein:
the jig further includes: an upper reinforcing sheet and a lower reinforcing sheet;
the upper reinforcing sheet is fixed between two side walls of the upper test piece chuck groove and the sandwich structure material;
the lower reinforcing sheet is fixed between two side walls of the lower test piece chuck groove and the sandwich structure material.
4. The clamp for the compression shear test of the sandwich structure material according to claim 3, wherein: the jig further includes: fastening a bolt;
threaded holes are formed in two side walls of the grooves of the upper test piece chuck and the lower test piece chuck;
the fastening bolt penetrates through the threaded hole to fix the reinforcing sheet.
5. The clamp for the compression shear test of the sandwich structure material according to claim 3, wherein: the jig further includes: fastening a bolt locking nut;
the fastening bolt locking nut is sleeved on the fastening bolt; and the fastening bolt locking nut is matched with two side walls of the grooves of the upper test piece chuck and the lower test piece chuck to lock the fastening bolt.
6. The clamp for the compression shear test of the sandwich structure material according to claim 1, wherein: the jig further includes: the upper limiting adapter and the lower limiting adapter are of semicircular groove structures; through holes are formed in two side walls of the semicircular grooves of the upper limiting adapter and the lower limiting adapter, the upper test piece chuck is arranged in the semicircular groove of the upper limiting adapter, and upper locking bolts at two ends of the upper test piece chuck penetrate through the through holes in the two side walls of the semicircular groove; the lower test piece chuck is arranged in a semicircular groove of the lower limiting adapter, and lower locking bolts at two ends of the lower test piece chuck penetrate through holes in two side walls of the semicircular groove; the locking nut is used for being matched with the side wall of the semicircular groove to fix the upper locking bolt and the lower locking bolt.
7. The clamp for the compression shear test of the sandwich structure material according to claim 1, wherein: through holes on two side walls of the semicircular grooves of the upper limiting adapter and the lower limiting adapter are arc-shaped through holes, and the radian of each arc-shaped through hole is the same as that of each semicircular groove;
the upper fastening bolt can slide in the arc-shaped through holes on the two side walls of the semicircular groove of the upper limiting adapter;
the lower fastening bolt can slide in the arc-shaped through holes in the two side walls of the semicircular groove of the lower limiting adapter.
8. The clamp for the compression shear test of the sandwich structure material according to claim 1, wherein: bosses are arranged at the tops of the upper limiting adapter and the lower limiting adapter; the boss is used for being connected with the unidirectional tension and compression testing machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011028866.5A CN112179759A (en) | 2020-09-25 | 2020-09-25 | Sandwich structure material compression shear test fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011028866.5A CN112179759A (en) | 2020-09-25 | 2020-09-25 | Sandwich structure material compression shear test fixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112179759A true CN112179759A (en) | 2021-01-05 |
Family
ID=73943657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011028866.5A Pending CN112179759A (en) | 2020-09-25 | 2020-09-25 | Sandwich structure material compression shear test fixture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112179759A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112816326A (en) * | 2021-01-25 | 2021-05-18 | 济南恒瑞金试验机有限公司 | Tool for testing biomechanical property of interbody fusion cage, testing machine and testing method |
| CN113702200A (en) * | 2021-07-15 | 2021-11-26 | 深圳大学 | Temperature-pressure coupling bidirectional electromagnetic loading dynamic compression-shear experimental device and test method |
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| CN107014682A (en) * | 2017-04-05 | 2017-08-04 | 中国矿业大学(北京) | A kind of loading device and method suitable for three-dimensional composite crack growth test |
| CN107063853A (en) * | 2017-06-16 | 2017-08-18 | 哈尔滨工业大学 | A kind of fixture for v-notch beam sample testing shear performance |
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| CN207147879U (en) * | 2017-08-28 | 2018-03-27 | 青岛科技大学 | A kind of improved During Geotechnical Tests shearing clamp |
| CN207439813U (en) * | 2017-11-23 | 2018-06-01 | 大连理工大学 | A kind of vertical tensile test apparatus containing tencel cloth fixture |
| CN108387441A (en) * | 2015-12-15 | 2018-08-10 | 陈晓辉 | A kind of fixture loading method |
| CN109443914A (en) * | 2019-01-02 | 2019-03-08 | 中国科学院地质与地球物理研究所 | Variable-angle compression-shear test fixture and its application method |
| CN111665127A (en) * | 2020-06-09 | 2020-09-15 | 北京科技大学 | Clamp for plate compression-shear fracture analysis sample, method thereof and sample |
-
2020
- 2020-09-25 CN CN202011028866.5A patent/CN112179759A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108387441A (en) * | 2015-12-15 | 2018-08-10 | 陈晓辉 | A kind of fixture loading method |
| CN105842055A (en) * | 2016-03-15 | 2016-08-10 | 北京航空航天大学 | Strength testing fixture using uniaxial testing machine for variable-proportion biaxial loading |
| CN105628496A (en) * | 2016-03-22 | 2016-06-01 | 北京航空航天大学 | Multifunctional shearing test fixture used for composite material parameter identification |
| CN107014682A (en) * | 2017-04-05 | 2017-08-04 | 中国矿业大学(北京) | A kind of loading device and method suitable for three-dimensional composite crack growth test |
| CN107101937A (en) * | 2017-05-10 | 2017-08-29 | 湖北三江航天江河化工科技有限公司 | A kind of multi-angle test device and its application method |
| CN107063853A (en) * | 2017-06-16 | 2017-08-18 | 哈尔滨工业大学 | A kind of fixture for v-notch beam sample testing shear performance |
| CN207147879U (en) * | 2017-08-28 | 2018-03-27 | 青岛科技大学 | A kind of improved During Geotechnical Tests shearing clamp |
| CN207439813U (en) * | 2017-11-23 | 2018-06-01 | 大连理工大学 | A kind of vertical tensile test apparatus containing tencel cloth fixture |
| CN109443914A (en) * | 2019-01-02 | 2019-03-08 | 中国科学院地质与地球物理研究所 | Variable-angle compression-shear test fixture and its application method |
| CN111665127A (en) * | 2020-06-09 | 2020-09-15 | 北京科技大学 | Clamp for plate compression-shear fracture analysis sample, method thereof and sample |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112816326A (en) * | 2021-01-25 | 2021-05-18 | 济南恒瑞金试验机有限公司 | Tool for testing biomechanical property of interbody fusion cage, testing machine and testing method |
| CN113702200A (en) * | 2021-07-15 | 2021-11-26 | 深圳大学 | Temperature-pressure coupling bidirectional electromagnetic loading dynamic compression-shear experimental device and test method |
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Application publication date: 20210105 |