CN110361255A - A kind of fixture for testing I mode Ⅱ fracture toughness for double cantilever beam tension test - Google Patents
A kind of fixture for testing I mode Ⅱ fracture toughness for double cantilever beam tension test Download PDFInfo
- Publication number
- CN110361255A CN110361255A CN201910766812.XA CN201910766812A CN110361255A CN 110361255 A CN110361255 A CN 110361255A CN 201910766812 A CN201910766812 A CN 201910766812A CN 110361255 A CN110361255 A CN 110361255A
- Authority
- CN
- China
- Prior art keywords
- hole
- clamping part
- clamped portion
- fixture
- cantilever beam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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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
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- 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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
-
- 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
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
-
- 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
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0067—Fracture or rupture
-
- 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
- G01N2203/0429—Chucks, fixtures, jaws, holders or anvils using adhesive bond; Gluing
Abstract
The invention discloses a kind of fixtures that I mode Ⅱ fracture toughness is tested for double cantilever beam tension test, it includes that structure is identical and the upper clamping device and lower clamping device of mirror image distribution, the upper clamping device includes: clamped portion, one end is clamped on testing machine, it is symmetrically set on the other end in the clamped portion there are two first lug, each first lug is equipped with first through hole；Clamping part, one end are equipped with the second lug, and second lug is equipped with the second through-hole, and the other end of the clamping part is connected through adhesive with a side end of testpieces；Pin is threaded through in the first through hole and the second through-hole, and second through-hole is located between two first through hole, and the both ends of the pin are threaded with nut, and the nut is connected to the two sides of the clamping part.The present invention facilitates the clamping and use of testing machine, while can ensure that load application will not be deviated and is uniformly distributed in drawing process.
Description
Technical field
The present invention relates to clamp arts, more particularly to a kind of double cantilever beam tension test I type interlayer of test that is used for break
Split the fixture of toughness.
Background technique
Currently, composite material has a wide range of applications in aerospace, new-energy automobile and weapon military industry field.Splicing is
A kind of common connection type of composite material, has many advantages, such as that structure is strong, antifatigue, joint efficiency is high.Therefore, for composite wood
Expect that the strength study of cementing structure has highly important theoretical value and engineering significance.
I type fracture toughness of adhesive bonding of composites structure is studied, needs to be tested using pairwise sequence alignment, it is existing
Some double cantilever beam load transmitting components use loading blocks or piano hinge more, but this two kinds of test fixtures have the disadvantage in that
Although loading blocks structure is simple, inconvenience is by test machine clamping；And piano hinge can not be truly realized in load transmission
Tensile load is evenly distributed with and is transmitted on testpieces.
Summary of the invention
It the technical issues of in the presence of the present invention mainly solution prior art, is pressed from both sides to provide a kind of facilitate by testing machine
It holds, and tensile load can be evenly distributed with to the double cantilever beam tension test that is used for being transmitted on testpieces and test I mode Ⅱ fracture toughness
Fixture.
Above-mentioned technical problem of the invention is mainly to be addressed by following technical proposals:
The fixture of I mode Ⅱ fracture toughness is tested provided by the present invention for double cantilever beam tension test comprising structure
The upper clamping device and lower clamping device of identical and mirror image distribution, the upper clamping device include:
Clamped portion, one end are clamped on testing machine, symmetrically set that there are two the on the other end in the clamped portion
One lug, each first lug are equipped with first through hole；
Clamping part, one end are equipped with the second lug, and second lug is equipped with the second through-hole, the other end of the clamping part
It is connected through adhesive with a side end of testpieces；
Pin is threaded through in the first through hole and the second through-hole, and second through-hole is located at two first through hole
Between, the both ends of the pin are threaded with nut, and the nut is connected to the two sides of the clamping part；
Wherein, the width in the clamped portion is slightly less than the width of the clamping part；When the clamped portion, clamping part,
After pin and nut assembly, the clamped portion can be freely rotated around the axis direction of the pin；
The fixture axle center, testpieces axle center and testing machine axle center are consistent.
Further, the shape in the clamped portion is rectangle, and the width in the clamped portion is slightly less than the testpieces
Width.
Further, the width of the clamping part and the testpieces is of same size.
Further, the first through hole is identical with the aperture of the second through-hole.
The beneficial effects of the present invention are: the clamping part of upper clamping device and lower clamping device passes through adhesive clamp assay
Then part assembles clamped portion using nut and pin and clamping part, nut is connected to the two sides of clamping part, because being clamped portion
Width is less than the width of clamping part, makes have gap between clamped portion and nut, so that clamped portion be made to be formed with clamping part
The mechanism of hinge-like can keep flexible rotating during the experiment, and then facilitate the clamping and use of testing machine, together
When, the clamp shaft heart, testpieces axle center and testing machine axle center can be made consistent with the effect of nut by pin, can ensured
Load application will not be deviated and is uniformly distributed in drawing process.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the use state of the fixture that I mode Ⅱ fracture toughness is tested for double cantilever beam tension test of the invention
Figure；
Fig. 2 is the structural representation of the fixture that I mode Ⅱ fracture toughness is tested for double cantilever beam tension test of the invention
Figure；
Fig. 3 is the upper clamping machine of the fixture that I mode Ⅱ fracture toughness is tested for double cantilever beam tension test of the invention
The structural schematic diagram of structure；
Fig. 4 is the explosive view of Fig. 3.
Specific embodiment
The preferred embodiment of the present invention is described in detail with reference to the accompanying drawing, so that advantages and features of the invention energy
It is easier to be readily appreciated by one skilled in the art, so as to make a clearer definition of the protection scope of the present invention.
Refering to fig. 1 shown in -4, the fixture that I mode Ⅱ fracture toughness is tested for double cantilever beam tension test of the invention,
It includes that structure is identical and the upper clamping device 1 and lower clamping device 2 of mirror image distribution, upper clamping device 1 include:
Clamped portion 11, one end are clamped in testing machine (not shown), are clamped symmetrical on the other end in portion 11
Ground is set there are two first lug 12, and each first lug 12 is equipped with first through hole 13；
Clamping part 14, one end be equipped with the second lug 18, the second lug 18 be equipped with the second through-hole 16, clamping part 14 it is another
End is connected through adhesive with a side end of testpieces 3；In the present invention, the second lug 18 and clamping part 14 are combined into a T
Type shape；The other end of the clamping part 14 of lower clamping device 2 is also connected through adhesive with the end side of testpieces 3.
Pin 15 is threaded through in first through hole 13 and the second through-hole 16, the second through-hole 16 be located at two first through hole 13 it
Between, the both ends of pin 15 are threaded with nut 17, and nut 17 is connected to the two sides of clamping part 14；
Wherein, the width for being clamped portion 11 is slightly less than the width of clamping part 14 and (in the present embodiment, is clamped the width in portion 11
Width less than clamping part 14 is 1mm)；After the assembly of clamped portion 11, clamping part 14, pin 15 and nut 17, it is clamped portion
11 can be freely rotated around the axis direction of pin 15；
Fixture axle center, 3 axle center of testpieces and testing machine axle center are consistent.
In the present invention, the clamping part 14 of upper clamping device 1 and lower clamping device 2 clamps testpieces 3 by adhesive, so
Afterwards, clamped portion 11 and clamping part 14 are assembled using nut 17 and pin 15, nut 17 is connected to the two sides of clamping part 14, because of quilt
The width of clamping part 11 is less than the width of clamping part 14, makes have gap between clamped portion 11 and nut 17, to make to be pressed from both sides
It holds portion 11 and clamping part 14 forms the mechanism of hinge-like, flexible rotating can be kept during the experiment, and then facilitate
The clamping and use of testing machine, meanwhile, by the effect of pin 15 and nut 17 can make the clamp shaft heart, 3 axle center of testpieces with
And testing machine axle center is consistent, can ensure that load application will not be deviated and is uniformly distributed in drawing process.
In the present invention, the shape for being clamped portion 11 is rectangle, and clamped portion 11 can be made using metal material, this
Sample can increase holding area, guarantee grip strength；Preferably, the width for being clamped portion 11 is slightly less than the width of testpieces, main
Interference is contacted in order to generate clamped portion 11 with nut 17.
Preferably, in order to improve effective holding area, the width of clamping part 14 is of same size with testpieces 3.
Preferably, relative torsion is generated in order to reduce clamped portion 11 with clamping part 14, improves mutual concentricity,
Ensure that the uniformity that load applies in experiment, first through hole 13 are identical with the aperture of the second through-hole 16.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
The change or replacement expected without creative work, should be covered by the protection scope of the present invention.Therefore, of the invention
Protection scope should be determined by the scope of protection defined in the claims.
Claims (4)
1. a kind of fixture for testing I mode Ⅱ fracture toughness for double cantilever beam tension test, which is characterized in that including structure phase
The upper clamping device and lower clamping device of same and mirror image distribution, the upper clamping device include:
Clamped portion, one end are clamped on testing machine, are symmetrically set on the other end in the clamped portion convex there are two first
Ear, each first lug are equipped with first through hole；
Clamping part, one end are equipped with the second lug, and second lug is equipped with the second through-hole, and the other end of the clamping part is through glue
Stick is connected with a side end of testpieces；
Pin is threaded through in the first through hole and the second through-hole, and second through-hole is located between two first through hole,
The both ends of the pin are threaded with nut, and the nut is connected to the two sides of the clamping part；
Wherein, the width in the clamped portion is slightly less than the width of the clamping part；When the clamped portion, clamping part, pin
After nut assembly, the clamped portion can be freely rotated around the axis direction of the pin；
The fixture axle center, testpieces axle center and testing machine axle center are consistent.
2. testing the fixture of I mode Ⅱ fracture toughness for double cantilever beam tension test as described in claim 1, feature exists
In the shape in the clamped portion is rectangle, and the width in the clamped portion is slightly less than the width of the testpieces.
3. testing the fixture of I mode Ⅱ fracture toughness for double cantilever beam tension test as described in claim 1, feature exists
In the width of the clamping part is of same size with the testpieces.
4. testing the fixture of I mode Ⅱ fracture toughness for double cantilever beam tension test as described in claim 1, feature exists
In the first through hole is identical with the aperture of the second through-hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910766812.XA CN110361255A (en) | 2019-08-20 | 2019-08-20 | A kind of fixture for testing I mode Ⅱ fracture toughness for double cantilever beam tension test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910766812.XA CN110361255A (en) | 2019-08-20 | 2019-08-20 | A kind of fixture for testing I mode Ⅱ fracture toughness for double cantilever beam tension test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110361255A true CN110361255A (en) | 2019-10-22 |
Family
ID=68223989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910766812.XA Pending CN110361255A (en) | 2019-08-20 | 2019-08-20 | A kind of fixture for testing I mode Ⅱ fracture toughness for double cantilever beam tension test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110361255A (en) |
Citations (9)
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|---|---|---|---|---|
| AU2008101040A4 (en) * | 2008-10-20 | 2009-01-08 | Karpour, Arash Mr | Mixed mode I/II/III fracture grip interface |
| CN102156069A (en) * | 2011-03-30 | 2011-08-17 | 复旦大学 | Clamp for mixed fracture test of dual-phase material interface |
| CN102346115A (en) * | 2010-08-03 | 2012-02-08 | 同济大学 | Axial tension test hinge mechanism capable of eliminating eccentric bending moment |
| KR20140084990A (en) * | 2012-12-27 | 2014-07-07 | 한국항공우주연구원 | Jig for tesile test of composite laminated structure |
| CN104142266A (en) * | 2014-07-31 | 2014-11-12 | 浙江大学 | Clamp for compact tension specimen of material testing machine under high pressure hydrogen environment |
| CN107621408A (en) * | 2017-08-29 | 2018-01-23 | 南京航空航天大学 | A kind of Fiber Reinforced Metal Laminates I mode Ⅱ fracture toughness GICEvaluation test method and device |
| CN108267363A (en) * | 2016-12-30 | 2018-07-10 | 中国科学院宁波材料技术与工程研究所 | A kind of composite material interlayer faults toughness test fixture and its application |
| CN108333047A (en) * | 2018-02-07 | 2018-07-27 | 西北工业大学 | A kind of the dynamic symmetry stretching device and its experimental method of I types precracked specimen |
| CN109738289A (en) * | 2019-02-27 | 2019-05-10 | 兰州大学 | A kind of two generation high-temperature superconductor band interfacial fracture toughness test methods |
-
2019
- 2019-08-20 CN CN201910766812.XA patent/CN110361255A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2008101040A4 (en) * | 2008-10-20 | 2009-01-08 | Karpour, Arash Mr | Mixed mode I/II/III fracture grip interface |
| CN102346115A (en) * | 2010-08-03 | 2012-02-08 | 同济大学 | Axial tension test hinge mechanism capable of eliminating eccentric bending moment |
| CN102156069A (en) * | 2011-03-30 | 2011-08-17 | 复旦大学 | Clamp for mixed fracture test of dual-phase material interface |
| KR20140084990A (en) * | 2012-12-27 | 2014-07-07 | 한국항공우주연구원 | Jig for tesile test of composite laminated structure |
| CN104142266A (en) * | 2014-07-31 | 2014-11-12 | 浙江大学 | Clamp for compact tension specimen of material testing machine under high pressure hydrogen environment |
| CN108267363A (en) * | 2016-12-30 | 2018-07-10 | 中国科学院宁波材料技术与工程研究所 | A kind of composite material interlayer faults toughness test fixture and its application |
| CN107621408A (en) * | 2017-08-29 | 2018-01-23 | 南京航空航天大学 | A kind of Fiber Reinforced Metal Laminates I mode Ⅱ fracture toughness GICEvaluation test method and device |
| CN108333047A (en) * | 2018-02-07 | 2018-07-27 | 西北工业大学 | A kind of the dynamic symmetry stretching device and its experimental method of I types precracked specimen |
| CN109738289A (en) * | 2019-02-27 | 2019-05-10 | 兰州大学 | A kind of two generation high-temperature superconductor band interfacial fracture toughness test methods |
Non-Patent Citations (1)
| Title |
|---|
| 中华人民共和国国家质量监督检验检疫总局等: "《中华人民共和国国家标准》", 5 November 2012 * |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20191022 |