CN107091782A - The experimental rig and method tested for composite type III energy release rate rate - Google Patents
The experimental rig and method tested for composite type III energy release rate rate Download PDFInfo
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- CN107091782A CN107091782A CN201710131514.4A CN201710131514A CN107091782A CN 107091782 A CN107091782 A CN 107091782A CN 201710131514 A CN201710131514 A CN 201710131514A CN 107091782 A CN107091782 A CN 107091782A
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- circular hole
- square plate
- testpieces
- type iii
- hole square
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- 239000002131 composite material Substances 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title description 9
- 238000012360 testing method Methods 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims description 10
- 238000002474 experimental method Methods 0.000 claims description 7
- 229920006267 polyester film Polymers 0.000 claims description 7
- 230000006378 damage Effects 0.000 claims description 3
- 238000010998 test method Methods 0.000 claims description 3
- 230000032798 delamination Effects 0.000 description 5
- 239000004568 cement Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
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
- G01N3/26—Investigating twisting or coiling properties
-
- 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
- G01N2203/0021—Torsional
-
- 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
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- 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 provides a kind of experimental rig tested for composite type III energy release rate rate, the device is made up of two torsion clamping devices up and down, two torsion clamping devices are symmetrically placed, clamping device is reversed in top includes top bare terminal end and upper circular hole square plate, clamping device is reversed in lower section includes bottom clamping end and lower circular hole square plate, and circular hole square plate is separately mounted on top bare terminal end and bottom clamping end by fastening bolt up and down.Compared with prior art, apparatus of the present invention simple structure, is easy to safeguard, specimen shape handling ease can easily coordinate torsion testing machine to realize pure type III fracture mode load test, and experimentation cost is relatively low, loading accuracy is high.
Description
Technical field
It is specifically that one kind is released for composite type III energy to fracture the present invention relates to fracture of composite materials testing field
Put the experimental rig and method of rate test.
Background technology
Application proportion of the composite in load-carrying construction is increasing so that the stress state that material is born is also increasingly
It is complicated.Delamination failure is one of common failure mode of composite laminated plate.Therefore, it is special to the delamination toughness of composite
Be not pure type III delamination fractures pattern and theory research it is also necessary all the more, to ensure safety that material structure is in use.
Current composite basic nature energy measuring technology is more ripe, general only to be added by some loading direction
Carry, you can obtain the single shaft mechanical property of material.Common composite single shaft testing standard can be found in GB/T1447-2005
(static tensile test) and GB/T 16779-2008 (La-drawing fatigue property test) etc., common composite laminated plate
Edge delamination drawing process testing standard can be found in HB 7071-1994, and the pure type III zonal testing method of composite then without
Any standard can be followed.
Research for composite delamination damage pattern is concentrated mainly on pure I types (opening mode), pure II types (sliding mode)
With the pattern analysis of I+II mixed types, I types and II types stress intensity factor and energy release rate have obtained more ripe grind
Study carefully, the fracture of I types can be tested according to double cantilever beam (DCB) and obtained, the fracture of II types can bend (ENF) experiment according to end notches and obtain
.The experimental study of above two pattern is easier to operate and obtained, and the more difficult reality of experiment of pure type III (tearing mode) fracture
It is existing.In the process of the test of pure type III fault analysis, I types and II types fracture mode must be sufficiently small so that can ignore, but
The experiment of pure type III fracture mode relatively difficult to achieve in existing technological means.
The content of the invention
The present invention is used for composite type III energy release rate to solve problem of the prior art there is provided one kind
The experimental rig and method of rate test, device simple structure, specimen shape handling ease, experimentation cost are relatively low, and loading accuracy is high.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of experimental rig tested for composite type III energy release rate rate, it is characterised in that：The device by
Two torsion clamping devices are constituted up and down.
Two of which torsion clamping device is symmetrically placed, and clamping device is reversed in top includes top bare terminal end and upper circular hole side
Disk, clamping device is reversed in lower section includes bottom clamping end and lower circular hole square plate；
Above-mentioned upper circular hole square plate is arranged on the bare terminal end of top by four fastening bolts；
Above-mentioned lower circular hole square plate is arranged on bottom clamping end by four fastening bolts.
Described upper circular hole square plate upper surface is smooth, and lower surface sets square protruding step and protruding circular ring, square protruding
The length of side and annulus external diameter of step are D, and the up/down perforation circular hole of an a diameter of d is equipped with the middle part of upper circular hole square plate.
Described lower circular hole square plate lower surface is smooth, and upper surface sets square protruding step and protruding circular ring, square protruding
The length of side and annulus external diameter of step are D, and the up/down perforation circular hole of an a diameter of d is equipped with the middle part of lower circular hole square plate.
The method of testing for the experimental rig tested for composite type III energy release rate rate, including procedure below：
Step 1, pure type III fracture mode composite materials testing part is prepared, the circle with a diameter of d is placed in the middle part of testpieces
The square polyester film in hole, is bonded to each other in circular hole regional testing part top layer and testpieces bottom, in polyester film area
Domain forms testpieces interior laminate layer region；
Step 2, by fastening bolt by upper circular hole square plate be arranged on top bare terminal end, by lower circular hole square plate be arranged on bottom
On bare terminal end；
Step 3, by testpieces upper surface together with the lower surface bonds of upper circular hole square plate, testpieces circular hole region with it is upper
The circular hole of circular hole square plate will be overlapped, and treat that cement solidifies；
Step 4, the upper surface of testpieces lower surface and lower circular hole square plate bonded together, testpieces circular hole region is with
The circular hole of circular hole square plate will be overlapped, and treat that cement solidifies；
Lower chuck clamps top bare terminal end and bottom clamping end respectively in step 5, operation torsion testing machine, is belonged to according to material
Property setting loading speed, start experiment, until testpieces destruction.
The present invention operation principle be：Torsion testing machine applies moment of torsion in bare terminal end, until moment of torsion when experimental piece is destroyed
Load is T, then the type III stress strength factor K of materialIIIApproximate formula is
Then type III energy release rate rate GIIIIt can be calculated according to stress intensity factor,
Wherein, G is the modulus of shearing of material.
Beneficial effect of the present invention is：
1st, device simple structure, is easy to process and safeguards, can be conveniently accomplished test mission；
2nd, specimen shape handling ease, it is not necessary to special machining shape；
3rd, pure type III fracture mode load test can be realized on torsion testing machine, experimentation cost is relatively low；
4th, experimental rig has enough loading accuracies.
Brief description of the drawings
Fig. 1 is structural representation of the invention；
Fig. 2 is front view of the invention；
Fig. 3 is the structural representation of testpieces of the present invention；
Loading schematic diagram when Fig. 4 is present invention work；
Each label title in figure：1st, top bare terminal end, 2, upper circular hole square plate, 3, lower circular hole square plate, 4, bottom clamping end, 5,
Fastening bolt, 6, testpieces, 6-1, testpieces top layer, 6-2, polyester film, 6-3, testpieces bottom.
Embodiment
Below in conjunction with the accompanying drawings, by way of embodiment, the present invention is described in detail：
Embodiment
A kind of experimental rig tested for composite type III energy release rate rate, as shown in Figure 1 and Figure 2, it is special
Levy and be：The device is made up of two torsion clamping devices up and down.
Two of which torsion clamping device is symmetrically placed, and clamping device is reversed in top includes top bare terminal end 1 and upper circular hole
Square plate 2, clamping device is reversed in lower section includes bottom clamping end 4 and lower circular hole square plate 3；
Above-mentioned upper circular hole square plate 2 is arranged on top bare terminal end 1 by four fastening bolts 5；
Above-mentioned lower circular hole square plate 3 is arranged on bottom clamping end 4 by four fastening bolts 5.
The described upper upper surface of circular hole square plate 2 is smooth, and lower surface sets square protruding step and protruding circular ring, square protruding
The length of side and annulus external diameter of step are D, and the upper middle part of circular hole square plate 2 is equipped with the up/down perforation circular hole of an a diameter of d.
The described lower lower surface of circular hole square plate 3 is smooth, and upper surface sets square protruding step and protruding circular ring, square protruding
The length of side and annulus external diameter of step are D, and the lower middle part of circular hole square plate 3 is equipped with the up/down perforation circular hole of an a diameter of d.
The method of testing for the experimental rig tested for composite type III energy release rate rate, including procedure below：
Step 1, pure type III fracture mode composite materials testing part 6 is prepared, as shown in figure 3, placing band in the middle part of testpieces
The square polyester film 6-2 of a diameter of d circular hole, is mutually bonded in circular hole regional testing part top layer 6-1 and testpieces bottom 6-3
Together, the interior laminate layer region of testpieces 6 is formed in polyester film 6-2 regions；
Step 2, by fastening bolt by upper circular hole square plate 2 be arranged on top bare terminal end 1, lower circular hole square plate 3 is arranged on
On bottom clamping end 4；
Step 3, by the upper surface of testpieces 6 together with the lower surface bonds of upper circular hole square plate 2, the circular hole region of testpieces 6
To be overlapped with the circular hole of upper circular hole square plate 2, treat that cement solidifies；
Step 4, the upper surface of the lower surface of testpieces 6 and lower circular hole square plate 3 bonded together, the circular hole region of testpieces 6
To be overlapped with the circular hole of lower circular hole square plate 3, treat that cement solidifies；
Lower chuck clamps top bare terminal end 1 and bottom clamping end 4 respectively in step 5, operation torsion testing machine, according to material
Attribute setup loading speed, starts experiment, until testpieces 6 is destroyed.
Torsion testing machine applies moment of torsion in bare terminal end, as shown in figure 4, until torque load when experimental piece is destroyed is T, then
The type III stress strength factor K of materialIIIApproximate formula is
Then type III energy release rate rate GIIIIt can be calculated and obtained according to stress intensity factor：
Wherein, G is the modulus of shearing of material.
Concrete application approach of the present invention is a lot, and described above is only the preferred embodiment of the present invention, it is noted that for
For those skilled in the art, under the premise without departing from the principles of the invention, some improvement can also be made, this
A little improve also should be regarded as protection scope of the present invention.
Claims (4)
1. a kind of experimental rig tested for composite type III energy release rate rate, it is characterised in that：Device is above and below
Two torsion clamping devices are constituted,
Two of which torsion clamping device is symmetrically placed, and clamping device is reversed in top includes top bare terminal end（1）With upper circular hole side
Disk（2）, upper circular hole square plate（2）It is fixedly mounted on top bare terminal end（1）On；
Clamping device is reversed in lower section includes bottom clamping end（4）With lower circular hole square plate（3）, lower circular hole square plate（3）It is fixedly mounted on
Bottom clamping end（4）On.
2. a kind of experimental rig tested for composite type III energy release rate rate according to claim 1, its
It is characterised by：Described upper circular hole square plate（2）Upper surface is smooth, and lower surface sets square protruding step and protruding circular ring, square
The length of side and annulus external diameter of raised step beD, upper circular hole square plate（2）It is a diameter of that middle part is equipped with onedUp/down perforation circular hole.
3. a kind of experiment dress tested for composite type III energy release rate rate according to claim 1 or 2
Put, it is characterised in that：Described lower circular hole square plate（3）Lower surface is smooth, and upper surface sets square protruding step and protruding circular ring,
The length of side and annulus external diameter of square protruding step beD, lower circular hole square plate（3）It is a diameter of that middle part is equipped with onedUp/down perforation circle
Hole.
4. a kind of method of testing tested for composite type III energy release rate rate, it is characterised in that including following mistake
Journey：
Step 1, prepare pure type III fracture mode composite materials testing part（6）, placed in the middle part of testpieces with a diameter ofdCircle
The square polyester film in hole（6-2）, in circular hole regional testing part top layer（6-1）With testpieces bottom（6-3）It is mutually bonded one
Rise, in polyester film（6-2）Region forms testpieces（6）Interior laminate layer region；
Step 2, by upper circular hole square plate（2）Installed in top bare terminal end（1）, by lower circular hole square plate（3）Installed in bottom clamping end
（4）On；
Step 3, by testpieces（6）Upper surface and upper circular hole square plate（2）Lower surface bonds together, make testpieces（6）Circular hole
Region and upper circular hole square plate（2）Circular hole overlap, and solidified；
Step 4, by testpieces（6）Lower surface and lower circular hole square plate（3）Upper surface bond together, make testpieces（6）Circular hole
Region and lower circular hole square plate（3）Circular hole to overlap, and solidified；
Lower chuck clamps top bare terminal end respectively in step 5, operation torsion testing machine（1）With bottom clamping end（4）, according to material
Attribute setup loading speed, starts experiment, until testpieces（6）Destruction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710131514.4A CN107091782B (en) | 2017-03-07 | 2017-03-07 | Test device and method for testing III-type fracture energy release rate of composite material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710131514.4A CN107091782B (en) | 2017-03-07 | 2017-03-07 | Test device and method for testing III-type fracture energy release rate of composite material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107091782A true CN107091782A (en) | 2017-08-25 |
| CN107091782B CN107091782B (en) | 2020-01-24 |
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|---|---|---|---|
| CN201710131514.4A Expired - Fee Related CN107091782B (en) | 2017-03-07 | 2017-03-07 | Test device and method for testing III-type fracture energy release rate of composite material |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107345874A (en) * | 2017-09-04 | 2017-11-14 | 桂林电子科技大学 | A kind of rupture failure experimental rig and method |
| CN107389454A (en) * | 2017-09-04 | 2017-11-24 | 桂林电子科技大学 | A kind of composite rupture test device suitable for various shapes size test specimen |
| CN108595754A (en) * | 2018-03-20 | 2018-09-28 | 南京航空航天大学 | The emulation mode of interlayer toughened composite laminated plate |
| CN111207983A (en) * | 2020-03-31 | 2020-05-29 | 福州晋安丁舒基电子科技有限公司 | Novel detection test device for bonding material |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD270141A1 (en) * | 1988-03-21 | 1989-07-19 | Koethen Ing Hochschule | DEVICE FOR PRODUCING AND TESTING AXIAL SYMMETRIC SAMPLES FOR WELDABILITY AND LAMINATE RAKE |
| CN201196613Y (en) * | 2008-04-07 | 2009-02-18 | 吴力航 | Material fracture toughness test sample without prefabricated crackle |
| CN102507346A (en) * | 2011-09-28 | 2012-06-20 | 中国工程物理研究院流体物理研究所 | Dynamic tension fracture experiment method of material |
-
2017
- 2017-03-07 CN CN201710131514.4A patent/CN107091782B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD270141A1 (en) * | 1988-03-21 | 1989-07-19 | Koethen Ing Hochschule | DEVICE FOR PRODUCING AND TESTING AXIAL SYMMETRIC SAMPLES FOR WELDABILITY AND LAMINATE RAKE |
| CN201196613Y (en) * | 2008-04-07 | 2009-02-18 | 吴力航 | Material fracture toughness test sample without prefabricated crackle |
| CN102507346A (en) * | 2011-09-28 | 2012-06-20 | 中国工程物理研究院流体物理研究所 | Dynamic tension fracture experiment method of material |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107345874A (en) * | 2017-09-04 | 2017-11-14 | 桂林电子科技大学 | A kind of rupture failure experimental rig and method |
| CN107389454A (en) * | 2017-09-04 | 2017-11-24 | 桂林电子科技大学 | A kind of composite rupture test device suitable for various shapes size test specimen |
| CN107345874B (en) * | 2017-09-04 | 2023-06-23 | 桂林电子科技大学 | Fracture damage test device and method |
| CN108595754A (en) * | 2018-03-20 | 2018-09-28 | 南京航空航天大学 | The emulation mode of interlayer toughened composite laminated plate |
| CN111207983A (en) * | 2020-03-31 | 2020-05-29 | 福州晋安丁舒基电子科技有限公司 | Novel detection test device for bonding material |
| CN111207983B (en) * | 2020-03-31 | 2020-12-15 | 巫山县曲尺乡宝子滩李子专业合作社 | Detection test device for bonding material |
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| CN107091782B (en) | 2020-01-24 |
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Granted publication date: 20200124 |