CN103940534B - For testing foil gauge assembly and the method for testing of thermosetting cast PBX solidification internal stress - Google Patents
For testing foil gauge assembly and the method for testing of thermosetting cast PBX solidification internal stress Download PDFInfo
- Publication number
- CN103940534B CN103940534B CN201410130965.2A CN201410130965A CN103940534B CN 103940534 B CN103940534 B CN 103940534B CN 201410130965 A CN201410130965 A CN 201410130965A CN 103940534 B CN103940534 B CN 103940534B
- Authority
- CN
- China
- Prior art keywords
- foil gauge
- base material
- testing
- internal stress
- solidification
- 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.)
- Expired - Fee Related
Links
Abstract
The present invention relates to the foil gauge assembly for testing thermosetting cast PBX solidification internal stress and method of testing.The involved foil gauge assembly being used for testing thermosetting cast PBX solidification internal stress includes base material and cladding foil gauge in the substrate, described foil gauge in described base material in tiling shape, the composition of described base material is: end hydroxy butadiene, dioctyl adipate, aluminium powder, 2,4 toluene di-isocyanate(TDI) and triphenyl bismuths.The method of testing of involved thermosetting cast PBX solidification internal stress includes, the calibration of foil gauge assembly, arrange foil gauge assembly and cast body and the test of solidification process stress.The foil gauge assembly of the present invention can be random the diverse location put within cast PBX; in test process, base material is good with the medicine slurry compatibility; the protection foil gauge having had base material will not crimp the corrosion also will not starched by liquid medicine, notable to the test effect of cast PBX solidification internal stress.
Description
Technical field
The invention belongs to explosive wastewater performance detection technique field, be particularly used for testing thermosetting cast PBX
The foil gauge assembly of solidification internal stress and method of testing.
Background technology
The size of thermosetting cast PBX solidification internal stress directly affects explosive and carefully sees physical arrangement, mechanical property
Dividing of the defects such as uniformity and explosive air entrapment, hole, irregular pattern, hard impurity and density interruption
Cloth.These phenomenons above-mentioned directly affect again the safety of cast PBX emission process.So test is certain solid
The size of solidification internal stress and distribution under metallization processes, find factor affect solidification internal stress size scarce to cast PBX
The control fallen into is most important, at this in research it is important that obtain inside cast PBX not coordination the most accurately
Put the numerical value of solidification internal stress.
Prior art the test of cast PBX solidification internal stress is typically all the most first by strain gauge adhesion equipped with thermosetting
Property cast PBX body shell on, by monitor shell case strain, use Hooke's law calculate in body
The solidification internal stress of explosive.This solidification internal stress can only represent the total stress of material in bullet, it is impossible to obtains in body not
The solidification internal stress of explosive at co-located.
Summary of the invention
For defect or the deficiency of prior art, one of technical purpose of the present invention is to provide a kind of for testing
The foil gauge assembly of thermosetting cast PBX solidification internal stress.
To this end, the foil gauge assembly being used for testing thermosetting cast PBX solidification internal stress that the present invention provides includes
Base material and cladding foil gauge in the substrate, described foil gauge in described base material in tiling shape, described base material
Composition be: end hydroxy butadiene, dioctyl adipate, aluminium powder, 2,4 toluene diisocyanate and three
Phenyl bismuth.
Preferably, the center during described foil gauge is positioned at described base material.
Preferably, the density of described base material is 1.62g/cm3～1.70g/cm3。
Preferably, granularity d of described aluminium powder50Being 13 μm, the mass percent of aluminium powder is 80%～81%,
The mass percent of dioctyl adipate is 10%～11%, and the mass percent of end hydroxy butadiene is
7.26%～8.74%, the mass percent of 2,4 toluene diisocyanate is 1.04%～1.25%, triphenyl
The mass percent of bismuth is 0.01%, and the mass percent of each component and be 100%.To guarantee that solid phase is at liquid
Occur without sedimentation in mutually, meet cast to pulp density and the requirement of viscosity simultaneously.
Preferably, the thickness of described base material is 1.9～2.2mm, the area of described base material and described foil gauge
Area ratio is 2.25～5.06.To guarantee that foundation material keeps Tong Bu deformation with foil gauge, and the coefficient of strain is steady
Fixed.
For defect or the deficiency of prior art, the two of the purpose of the present invention are to provide a kind of thermosetting cast
The method of testing of PBX diverse location solidification internal stress.
To this end, the method for testing of the thermosetting cast PBX solidification internal stress of present invention offer includes:
(1) calibration of foil gauge assembly: determine the coefficient of strain of base material strain value and foil gauge strain value,
Described base material strain value is base material strain value and foil gauge strain value with the coefficient of strain of foil gauge strain value
Ratio；
(2) foil gauge assembly is arranged: need the position of test in casting mold according to test body medicine slurry
Arrange foil gauge assembly.
(3) cast body and the test of solidification internal stress: water injection slurry in casting mold, and utilize strain
The stress of chip module test corresponding position solidification process.
Compared with prior art, the beneficial effects of the present invention is:
(1) in the foil gauge assembly of the present invention, base material is close, at testing large body with test medicine pulp density
During different depth solidification internal stress, base material can be fixed on the position of required test accurately, and does not haves base
The consistency problem that material is starched with medicine.
(2) foil gauge is tightly wrapped up by curing network by base material, solves the stickup of foil gauge and base material
Etching problem with foil gauge.
(3) in the foil gauge assembly of the present invention, base material is consistent with the deformation synchronicity of foil gauge, the coefficient of strain
Constant, solve stability and the integrity problem of test data.
To sum up, the diverse location put within cast PBX that the foil gauge assembly of the present invention can be random,
In test process, base material is good with the medicine slurry compatibility, has had the protection foil gauge of base material to crimp and also will not be subject to
The corrosion of liquid medicine slurry, notable to the test effect of cast PBX solidification internal stress.
Accompanying drawing explanation
Base material layout drawing in body when Fig. 1 is test cast loading solidification internal stress；
Fig. 2 is thick for 1.0mm base material with the strain that solidifies foil gauge in the substrate；
Fig. 3 is thick for 2.0mm base material with the strain that solidifies foil gauge in the substrate；
Fig. 4 is thick for 4.0mm base material with the strain that solidifies foil gauge in the substrate；
Fig. 5 is that area is 6 × 12mm base material and solidifies the strain of foil gauge in the substrate；
Fig. 6 is that area is 10 × 20mm base material and solidifies the strain of foil gauge in the substrate；
Fig. 7 is the strain curve that in cast loading solidification process, in base material 1, foil gauge is tested；
Fig. 8 is the strain curve that in cast loading solidification process, in base material 2, foil gauge is tested.
Detailed description of the invention
Utilize existing foil gauge (the high temperature resistant foil gauge of BB120-44A (11) 250 prepared such as Air China's electrical measurement)
When directly cloth carries out solidification process stress test in being put into cast PBX explosive, owing to existing foil gauge size is little,
Can crimp after by the thermal stress in medicine slurry solidification process, wave, and foil gauge starches it with explosive medicine
Between the compatibility bad, foil gauge can be caused to corrode, it is impossible to obtain the solidification internal stress of explosive diverse location in body.
It is therefore desirable to a kind of foil gauge base material of preparation, to solve existing foil gauge in testing liquid-solid transition process
Problem existing during solidification internal stress.The needs quantified for cast loading solidification internal stress, the present invention utilizes heat
The thinking of solidity base material parcel foil gauge, to cast loading, under different solidification temperatures, in solidification process, solidification should
Power is measured and record in real time, has reached the purpose of solidification internal stress accurate quantification, thus has joined for curing process
Arranging of number provides data support.
About the determination of base material formula, the main research carried out in research process of the present invention is as follows:
For the arbitrary portion in foil gauge may be at body medicine slurry when testing solidification internal stress, made base material
Density should be close with the density of medicine slurry, the compatibility simultaneously starched in order to ensure base material and medicine and reduction preparation process
Danger take the composition of base material component and cast PBX close and remove containing can composition.Base material component is:
End hydroxy butadiene, dioctyl adipate, aluminium powder, 2,4 toluene diisocyanate and triphenyl bismuth.
Consider cast and the making of foil gauge assembly of base material, to granularity d50It is 5 μm, 13 μm, 26 μm
The impact of density is found by content of aluminium powder, and the mass percentage content of these several granularity aluminium powders is between 80%-81%
During change, the aluminium powder in slip will not settle, and uniformity is good.On this basis, aluminium powder grain has been carried out
Spending affects experimentation to density and viscosity.The results are shown in Table 1, according to viscosity and the basic demand of density,
Finally determine granularity d50It is 13 μm aluminium powders.
Table 1 aluminum powder particle size and pulp density and the relation of viscosity
About the determination of base material thickness, base material and foil gauge strain synchronicity test, it is main that inventor is carried out
Test is described as follows:
(1) test specimen prepares
A width of 40mm of tensile testing machine stretching clamp, when doing tension test, fixture is clamped the position of test specimen and is
50mm, is divided into upper and lower two fixtures, so the minimum length of test specimen is 100mm, because foil gauge used
Area is 4 × 8mm, and when making stretching experiment, foil gauge need to be in the middle of stretching clamp, so upper lower clamp
Between minimum range be 8mm.Because fixture is not readily accessible to foil gauge to avoid the damage of foil gauge, then
In view of the assembling of fixture, so the minimum range that upper lower clamp is when doing base material stretching experiment is 20mm.
The minimum length of base material test specimen is 20mm+50mm+50mm=120mm.
It is 1 × 40 × 120mm according to the manufacture method manufactured size (thickness × width x length) of foil gauge assembly,
The base material each ten with foil gauge of 2 × 40 × 120mm, 4 × 40 × 120mm, the foil gauge size in base material
Being 4 × 8mm, foil gauge is in the center of each base material.Carry out base material and foil gauge strain synchronicity test.
The manufacture method of foil gauge assembly is:
1. configuration base material medicine slurry: accurately weigh end hydroxy butadiene and dioctyl adipate according to recipe requirements
80 DEG C of mixing, processed 4h is cooled to 60 DEG C, adds aluminium powder, 60 DEG C of vacuum kneading 1h, adds
The mixture vacuum stirring of 2,4 toluene diisocyanate and triphenyl bismuth 20 minutes, is cast into
The Teflon mould of 2 × 40 × 120mm forms thin film thick for 1mm (by weight method control: be cast into
The pulp quality of Teflon mould is the volume that pulp density is multiplied by half thickness mould), evacuation is removed
Because of the bubble brought into of cast, swing die makes that slip is smooth is paved with half thickness mould.
Testing this glue 60 DEG C and time a length of 488min of gelatin phenomenon occur, now glue caking property is best,
Foil gauge smooth can be pasted on slip surface.It is attached to coagulate by smooth for foil gauge when 60 DEG C of solidification 488min
The surface of gluey slip, as above prepares new slip casting progressive die tool and ultimately forms the base material of 2 × 40 × 120mm.
2. determined by hardness method and be fully cured duration, when within 4 days, hardness reaches 62HA in 60 DEG C of solidifications, base
Material hardness no longer changes, and solidifies 4 days so the curing process of this base material is 60 DEG C.After having solidified,
Turning off baking oven power supply, when base material is cooled to room temperature, the demoulding obtains 2 × 40 × 120mm's with foil gauge
Base material
The fundamental performance parameter of base material is: density 1.62g/cm3～1.70g/cm3；Stretch modulus
15.6-20.0Mpa。
(2) content of the test
1. test specimen is placed between electronic universal tester two fixture, and presss from both sides with less speed adjustment stretching-machine two
The spacing of tool, makes test specimen and fixture compact siro spinning technology, is now critical state, answers vanishing；
2. controlling firing test machine makes the motion of its displacement such as grade (2mm/min) start tension test；
3. strain curve is recorded.
(3) result of the test and analysis
By to the contrast of explosive size before and after solidification, it is believed that the explosive caused because of solidification internal stress strains 6%
Within, inspection base material should be greater than 6% and just can ensure that the test strain value to explosive.Under prior art made
The maximum strain of standby base material is 11%, (when strain is more than 11%, base material destroys).So test base
The maximum that material strains linear synchronicity with foil gauge is set to 11%.
Respectively the base material that 1.0mm, 2.0mm, 4.0mm are thick is carried out stretching experiment, with testing substrates with should
Become the synchronicity of the deformation of sheet.Experimental technique is as follows:
Stretching clamp runs with 2mm/min constant speed, and test specimen sets 4 minutes, i.e. stretches 8.0mm；In conjunction with drawing
Stretch part size, it is known that elongation strain is about 11%, by the relation mapping of tensioning member internal strain in 4 minutes with time
Such as Fig. 2, Fig. 3 and Fig. 4.
Fig. 2 is 1.0mm thickness base material and the strain solidifying foil gauge in the substrate, is solidificated in as seen from Figure 2
Foil gauge in 1.0mm thickness base material is at base material by the strain time of 11%, and foil gauge in base material strain is
Unsticking phenomenon occurs when 0.041, and when base material continues strain, foil gauge does not strain, this phenomenon explanation
1.0mm thickness base material is bad with the stickup of foil gauge, and in base material occurs the strain time of 11%, foil gauge should
Change can not reach the requirement of linear increase.
Fig. 3 is 2.0mm thickness base material and solidifies the strain of foil gauge in the substrate, as seen from Figure 3 base material and
Foil gauge strains linear with the time when constant speed stretches, and linear coefficient all reaches more than 0.9990.
Base material and solidification foil gauge in the substrate can reach the effect simultaneously strained, simply by identical external force
Time, it is not of uniform size that both deform.This phenomenon explanation 2.0mm thickness base material can meet test solidification internal stress
Requirement, however it is necessary that find solidification foil gauge in the substrate and base material itself by strain value during external force it
Between relation.
Fig. 4 is 4.0mm thickness base material and the strain solidifying foil gauge in the substrate, and base material is being subject to as seen from Figure 4
Linear with the time to straining during External Force Acting, and the strain solidifying foil gauge in the substrate did not had with the time
Have linear.This makes the strain value using foil gauge to test be difficult to accurately calculate answering of base material
Become.This phenomenon explanation 4.0mm thickness base material is unsatisfactory for testing the requirement of solidification internal stress.
In above-mentioned strain synchronicity is tested, find that the foil gauge being solidificated in 2.0mm thickness base material is subject at base material
To preferable with the deformation synchronicity of base material during external force, the strain of foil gauge is linear.Use above-mentioned side further
The scope of 2.0mm thickness base material thickness is determined by method, when base material thickness is in the range of 1.90-2.20mm
Base material is preferable with foil gauge deformation synchronicity, and foil gauge strain is linear.
About the determination of base material area, the relevant main experimental that inventor is carried out is described as follows:
Because foil gauge area is the least, the area of base material also can be the least, and tensile test fixture can not complete reality
Test, so selecting compression experiment to carry out the synchronicity of testing substrates and foil gauge strain to determine the big of base material area
Little.Experimental technique is to apply certain pressure on the base material with foil gauge, obtains from universal testing machine
Base material compression strain value compare with the foil gauge compression strain value obtained on dynamic strain indicator, with this
Determine the area of base material.
The foil gauge size (long × wide) that inventor tentatively selects is 4 × 8mm, and tentative base material area is 6 × 12mm,
7 × 14mm, 8 × 16mm, 9 × 18mm, 10 × 20mm, 11 × 20mm, carry out 2mm thickness base under above-mentioned area simultaneously
The synchronicity test of material and foil gauge.Result display area is 6 × 12mm, 7 × 14mm, 8 × 16mm, 9 × 18mm
Base material synchronicity and strain linear preferable, test is such as Fig. 5.Area is 10 × 20mm, 11 × 20mm's
The linear of base material is bad, and test is such as Fig. 6.
So on the premise of length-width ratio follows foil gauge length-width ratio, base material with the area ratio scope of foil gauge is
2.25～5.06.
The following is the specific embodiment that inventor provides, so that technical scheme to be further explained
Bright.
Embodiment:
In this embodiment, use YE3818 dynamic strain indicator (general dynamic strain amplifier), 120 Ω's
The high temperature resistant foil gauge of BB120-44A (11) 250, in 1000ml thermosetting PBX solidification process body two
The solidification internal stress of diverse location is tested, and wherein solidification temperature is 80 DEG C.Test data passes through HBM company
GEN5i is acquired, and frequency acquisition is 10/s, and collection period is 18h.
The composition of thermosetting cast PBX is: end hydroxy butadiene, aluminium powder, dioctyl adipate, 2,4-
Toluene di-isocyanate(TDI), triphenyl bismuth, hexogen and HMX, density is 1.62g/cm3～1.70
g/cm3。
The fundamental performance parameter of base material is: density 1.64g/cm3；Stretch modulus 15.6Mpa；Thick 2mm,
Long 12mm, wide 6mm；A length of 8mm of foil gauge, wide 4mm.
Testing procedure:
(1) make 2.0 × 6.0 × 12.0mm base material 10, carry out strain value system between base material and foil gauge
The calibration of number.Carry out deforming synchronicity demarcation by compression verification method and determine that base material strain value strains with foil gauge
The coefficient of strain of value, the direct survey specifically obtained divided by deformeter with the base material strain data on universal testing machine
Examination data, i.e. can get the coefficient of strain of base material strain value and foil gauge strain value.The calibration value of 10 tests
It is 1.96,1.96,1.96,1.97,1.96,1.96,1.95,1.96,1.95,1.97.10 times
The meansigma methods of calibration value is 1.96.I.e. base material strain value is 1.96 times of foil gauge strain value.
(2) as it is shown in figure 1, foil gauge assembly 1 is arranged in casting mold 3, cloth in this embodiment
Putting two foil gauge assemblies, shown in Fig. 1, upper position is position one, and lower position is position two, in advance
Preparation one is used for fixing the rectangle brandreth 2 of base material, is fixed on brandreth by lead-in wire by foil gauge assembly,
Then brandreth epoxy glue solution is vertically pasted onto at the bottom of bullet；
(3) in casting mold, test medicine slurry is injected；
(4) body is put into curing oven；Lead-out wire on foil gauge is connected with deformeter simultaneously, opens
Open power supply to test.Along with the carrying out of curing reaction, solidification internal stress will act directly on and cause base on base material
The deformation of material, thus cause the change of base material internal strain sheet, the strain data obtained according to deformeter calculates should
The size of power.
Strain time graph such as Fig. 5 and Fig. 6 of various location in the body that dynamic strain indicator is tested, from
Fig. 5 and Fig. 6 i.e. can get the strain value that solidification process a certain moment foil gauge is tested, should according to base material
Variate is 1.96 times of foil gauge strain value, i.e. εBase material=1.96εTest, then calculate stress according to formula σ=E ε
Size.σ is the stress of test；E is the elastic modelling quantity of base material, E=15.6Mpa；εBase materialAnswering for base material
Become；εTestStrain for test.
In this embodiment body, diverse location cast PBX is at the solidification internal stress (solidification process in difference solidification moment
In stress) be shown in Table 2.
The solidification internal stress of table 2 cast loading different hardening time
| Time/hour | Position 1 solidification internal stress/Pa | Position 2 solidification internal stresses/Pa |
| 0 | 0 | 0 |
| 7.1 | 737 | 787 |
| 8.3 | 981 | 1030 |
| 10.7 | 542 | 603 |
| 12.5 | 333 | 435 |
| 17.2 | 102 | 150 |
| 23.6 | 95 | 159 |
| 47.3 | 32 | 58 |
Claims (4)
1. the foil gauge assembly being used for testing thermosetting cast PBX solidification internal stress, it is characterised in that
This foil gauge assembly includes base material and cladding foil gauge in the substrate, described foil gauge in described base material in
Tiling shape, the composition of described base material is: end hydroxy butadiene, dioctyl adipate, aluminium powder, 2,4-first
Phenylene diisocyanate and triphenyl bismuth；
Granularity d of described aluminium powder50Being 13 μm, the mass percent of aluminium powder is 80%～81%, adipic acid two
The mass percent of monooctyl ester is 10%～11%, the mass percent of end hydroxy butadiene be 7.26%～
8.74%, the mass percent of 2,4 toluene diisocyanate is 1.04%～1.25%, the matter of triphenyl bismuth
Amount percentage ratio is 0.01%, and the mass percent of each component and be 100%.
2. the foil gauge assembly for testing thermosetting cast PBX solidification internal stress as claimed in claim 1,
It is characterized in that, described foil gauge is positioned at the center in described base material.
3. the foil gauge assembly for testing thermosetting cast PBX solidification internal stress as claimed in claim 1,
It is characterized in that, the density of described base material is 1.62g/cm3～1.70g/cm3。
4. the foil gauge assembly for testing thermosetting cast PBX solidification internal stress as claimed in claim 1,
It is characterized in that, the thickness of described base material is 1.9～2.2mm, the area of described base material and described foil gauge
Area ratio is 2.25～5.06.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410130965.2A CN103940534B (en) | 2014-04-02 | 2014-04-02 | For testing foil gauge assembly and the method for testing of thermosetting cast PBX solidification internal stress |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410130965.2A CN103940534B (en) | 2014-04-02 | 2014-04-02 | For testing foil gauge assembly and the method for testing of thermosetting cast PBX solidification internal stress |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103940534A CN103940534A (en) | 2014-07-23 |
| CN103940534B true CN103940534B (en) | 2016-08-17 |
Family
ID=51188298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410130965.2A Expired - Fee Related CN103940534B (en) | 2014-04-02 | 2014-04-02 | For testing foil gauge assembly and the method for testing of thermosetting cast PBX solidification internal stress |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103940534B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104236758B (en) * | 2014-09-18 | 2016-09-14 | 西安近代化学研究所 | Explosive wastewater curing molding process internal stress and the measurement apparatus of distribution thereof |
| CN109682293B (en) * | 2018-12-05 | 2020-05-19 | 东南大学 | Method for determining thickness of structural protection layer of reinforced cement-based composite material with ribbed bar |
| CN110160693A (en) * | 2019-07-08 | 2019-08-23 | 无锡集磁科技有限公司 | The measuring method of orientation silicon steel magnetic core resin solidification stress |
| CN114485538B (en) * | 2021-12-13 | 2023-08-22 | 中国工程物理研究院化工材料研究所 | Method for improving strain measurement accuracy of PBX structural member |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4756194A (en) * | 1985-12-16 | 1988-07-12 | Aerospatiale Societe Nationale Industrielle | Method and system for controlling cracks in loaded structures |
| CN101738459A (en) * | 2010-01-25 | 2010-06-16 | 江苏博特新材料有限公司 | Expansion/shrinkage stress testing device for cement-based material |
| CN201653600U (en) * | 2010-03-24 | 2010-11-24 | 国网电力科学研究院 | Isolated strain-free meter |
| CN103323154A (en) * | 2013-05-24 | 2013-09-25 | 西安近代化学研究所 | Method for measuring inner stress in pouring explosive solidification process |
-
2014
- 2014-04-02 CN CN201410130965.2A patent/CN103940534B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4756194A (en) * | 1985-12-16 | 1988-07-12 | Aerospatiale Societe Nationale Industrielle | Method and system for controlling cracks in loaded structures |
| CN101738459A (en) * | 2010-01-25 | 2010-06-16 | 江苏博特新材料有限公司 | Expansion/shrinkage stress testing device for cement-based material |
| CN201653600U (en) * | 2010-03-24 | 2010-11-24 | 国网电力科学研究院 | Isolated strain-free meter |
| CN103323154A (en) * | 2013-05-24 | 2013-09-25 | 西安近代化学研究所 | Method for measuring inner stress in pouring explosive solidification process |
Non-Patent Citations (1)
| Title |
|---|
| 炸药浇铸过程中应力的两种测试方法;董明等;《兵工自动化》;20090531;第28卷(第5期);第1小节，第2小节 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103940534A (en) | 2014-07-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103940534B (en) | For testing foil gauge assembly and the method for testing of thermosetting cast PBX solidification internal stress | |
| CN108760102B (en) | Piezoresistive sensor with super-elastic porous structure and preparation method thereof | |
| CN103439206B (en) | Micro-indentation-based method for testing residual stress of tiny area of tough block material | |
| US20230160844A1 (en) | Test method and algorithm for aging life of new energy heat management composite, and use thereof | |
| CN106644761B (en) | A kind of test method of measurement rock-concrete interface shearing constitutive relation | |
| CN105466775A (en) | Lateral compression performance testing method for brazing metal honeycomb structure | |
| CN108414379A (en) | A method of indentation Test extraction metal elastic-plastic mechanical parameter in situ | |
| CN110927212A (en) | Testing device for thermal conductivity and contact thermal resistance of gas diffusion layer in compression state | |
| CN111380777A (en) | Measuring die and testing method for lithium ion battery anode material powder compaction density | |
| CN103353366A (en) | Method for dynamic measurement of contact pressure of friction pair of circular plate | |
| CN107084661B (en) | Structural adhesive curing stress testing device and testing method | |
| CN102680361B (en) | Method and device for measuring flowability of rubber compound | |
| CN113640117A (en) | Method for testing elastic modulus of coating | |
| CN106370097A (en) | Strain gauge for composite material and preparation method thereof | |
| CN108169066A (en) | A kind of assay method of bread specific volume | |
| Luo et al. | An experimental investigation on thermal contact resistance across metal contact interfaces | |
| CN109458976A (en) | A kind of device and its measuring method of the strain of measurement inside concrete | |
| CN207044561U (en) | A kind of naphthalene ball manufactures mould | |
| CN110686969A (en) | Method for testing dynamic modulus of asphalt mixture in semicircular bending loading mode | |
| CN105527013A (en) | Implanted piezoelectric acceleration transducer for concrete structure health monitoring/detection as well as manufacturing method and application thereof | |
| US20130327210A1 (en) | Device for applying a directed contact pressure force to a multitude of samples | |
| CN112326419B (en) | Concrete elastic modulus measuring method based on capillary stress | |
| CN109900560B (en) | Metal material deformation-structure relation testing method based on frustum-shaped sample | |
| CN111811938A (en) | Strain brick and preparation method thereof | |
| CN102207476A (en) | Testing method for determining gelation time of EVA hot melt adhesive by rheometer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160817 Termination date: 20190402 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |