CN107202756A - A kind of simulating analysis of glass viscose glue failure - Google Patents
A kind of simulating analysis of glass viscose glue failure Download PDFInfo
- Publication number
- CN107202756A CN107202756A CN201710336028.6A CN201710336028A CN107202756A CN 107202756 A CN107202756 A CN 107202756A CN 201710336028 A CN201710336028 A CN 201710336028A CN 107202756 A CN107202756 A CN 107202756A
- Authority
- CN
- China
- Prior art keywords
- viscose glue
- glass
- simulating analysis
- failure
- glass viscose
- 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
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/04—Measuring adhesive force between materials, e.g. of sealing tape, of coating
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 present invention relates to simulation analysis technical field, and in particular to a kind of simulating analysis of glass viscose glue failure, it is characterised in that comprise the following steps：S1：Glass stickie coupon is stretched and shearing test；S2：Stretching and shearing limit force curve are obtained by above-mentioned experiment；S3：Pass through the stretching of above-mentioned limiting force curve acquisition and shear defect；S4：According to stretching, shear defect, the keyword defined in analogue simulation software stretches mistake, shearing effect simulation to realize.The simulating analysis of glass viscose glue failure provided by the present invention, by carrying out simulation analysis to glass viscose glue failure conditions, glass cement to be connected to the situation that can be failed with viscose glue in full scale vehicle collision in complete automobile collision emulation to coincide well, the local deformation pattern of vehicle is differed smaller with experiment, improve the degree of accuracy of emulation.
Description
Technical field
The present invention relates to the simulating analysis of simulation analysis technical field, more particularly to a kind of failure of glass viscose glue.
Background technology
Glass viscose glue is as a kind of common connected mode on automobile, compared to the advantage that conventional point is welded with itself, mainly
It is that gluing is also a kind of load-carrying construction, and larger stress can be born.It is used for the glass viscose glue that structure is connected in automobile, can be with
Between various high tensile metals or nonmetallic forms the connection of permanent high intensity, the allusion quotation during epoxy resin adhesive is exactly gluing
Type is represented.The glass viscose binder commonly used at present, its density is slightly larger than water, and yield strength can reach 20-40Mpa after solidification, real
In the vehicle body design of border, the gluing position being used for based on shearing, to play excellent properties of the adhesive under shearing condition.
At present, coming off for glass viscose glue, the glue between vehicle body sheet metal and glass metal plate are not considered in complete automobile collision emulation
It is connected using inseparable connected way of contact, therefore glass cement is connected in complete automobile collision emulation as will not fail
Mode handled, viscose glue using physical grid set up, because complete automobile collision belongs to Nonlinear Simulation, this mode consumes very much
When, and due to not considering failure, the situation that can be failed with viscose glue in full scale vehicle collision can not well be coincide, can usually be led
Cause the local deformation pattern of vehicle to differ more with experiment, influence the degree of accuracy of emulation.
Based on above-mentioned present situation, how the viscous adhesive strength of more preferable simulation glass cement, it is considered to the failure of viscose glue comes off situation,
Simulation result is more nearly with experiment, just turn into the technical problem of urgent need to resolve.In view of this, it is special to propose the present invention.
The content of the invention
(1) technical problem to be solved
It is an object of the invention to provide a kind of simulating analysis of glass viscose glue failure, it is intended to solves prior art
In, glass cement is connected in complete automobile collision emulation and handled as the mode that will not be failed, viscose glue point uses physical grid
Set up, because complete automobile collision belongs to Nonlinear Simulation, this mode takes very much；And due to not considering failure, touched with real vehicle
The situation that hitting middle viscose glue can fail can not coincide well, can frequently result in the local deformation pattern of vehicle and differed with experiment
It is more, influence the accuracy problems of emulation.
(2) technical scheme
In order to solve the above-mentioned technical problem, the invention provides a kind of simulating analysis of glass viscose glue failure, including
Following steps：
S1：Glass stickie coupon is stretched and shearing test；
S2：Stretching and shearing limit force curve are obtained by the shearing test described in step S1；
S3：Tensile breaking point NFLS and shearing by glass viscose glue described in limiting force curve acquisition described in step S2
Strength degree SFLS；
S4：According to the tensile breaking point obtained in step S3, keyword is with reality defined in analogue simulation software
Existing tensile failure simulation；Or according to the shear defect obtained in step S3, it is crucial defined in analogue simulation software
Word with realize shear fails simulate.
It is preferred that, in the tensile breaking point NFLS and shear defect SFLS, the step S4 in the step S3
Viscose glue unit normal stress σ n and tangential stress σ s, if meeting formulaThen viscose glue contact failure.
It is preferred that, the glass stickie coupon in the step S1 includes glass viscose glue and the mobile metal being oppositely arranged
Plate and fixed metal plate, the glass viscose glue are arranged between the mobile metallic plate and the fixed metal plate.
It is preferred that, the thickness of the mobile metallic plate is 1mm to 3mm.
It is preferred that, the glass viscose glue is radius 15mm to 25mm cake, the thickness of the glass viscose glue for 2mm extremely
4mm。
It is preferred that, the glass stickie coupon stretching in the step S1, the speed of shearing are in 0.04m/s extremely
0.06m/s。
It is preferred that, in the step S4, adhesive area grid is processed into hexahedron net in the analogue simulation software
Trellis viscose glue unit, and then set up the contact of adhesive area.
It is preferred that, the viscose glue unit is modeled in the analogue simulation software, face in extraction, the viscose glue unit and institute
The gap for stating middle face is 0.5mm to 1.5mm.
It is preferred that, the basic size of the viscose glue unit is 5mm to 15mm.
It is preferred that, the object of the simulation in the analogue simulation software is No. 20 body materials.
(3) beneficial effect
The above-mentioned technical proposal of the present invention has the advantages that：The emulation of glass viscose glue failure provided by the present invention
Analysis method, by carrying out simulation analysis to glass viscose glue failure conditions so that lose glass viscose glue in complete automobile collision emulation
The situation of effect takes into account so that glass cement is connected in complete automobile collision emulation can fail with viscose glue in full scale vehicle collision
Situation can coincide well, the local deformation pattern of vehicle differ smaller with experiment, the degree of accuracy that raising is emulated.
Brief description of the drawings
The flow chart for the simulating analysis that Fig. 1 fails for the glass viscose glue of the embodiment of the present invention；
The side view of glass viscose glue simulation model in the simulating analysis that Fig. 2 fails for the glass viscose glue of the embodiment of the present invention
Figure；
The contact of glass viscose glue sets figure in the simulating analysis that Fig. 3 fails for the glass viscose glue of the embodiment of the present invention；
Stretching force-displacement curve figure in the simulating analysis that Fig. 4 fails for the glass viscose glue of the embodiment of the present invention；
Shearing force-displacement curve figure in the simulating analysis that Fig. 5 fails for the glass viscose glue of the embodiment of the present invention；
Wherein, 1- moves metallic plate；2- fixed metal plates；3- glass viscose glues.
Embodiment
Embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples.Following examples are used for
Illustrate the present invention, but can not be used for limiting the scope of the present invention.
In the description of the invention, unless otherwise indicated, " multiple " are meant that two or more；Unless otherwise saying
Bright, the implication of " nick shaped " is the shape in addition to section is concordant.Term " on ", " under ", "left", "right", " interior ", " outer ", " preceding
End ", " rear end ", " head ", the orientation of the instruction such as " afterbody " or position relationship be based on orientation shown in the drawings or position relationship,
It is for only for ease of the description present invention and simplifies description, rather than to indicate or imply that signified device or element must have specific
Orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.In addition, term " first ",
" second ", " 3rd " etc. are only used for describing purpose, and it is not intended that indicating or implying relative importance.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected to by intermediary.For this
For the those of ordinary skill in field, concrete condition can be regarded and understand the concrete meaning of above-mentioned term in the present invention.
Referring to Fig. 1, the flow chart for the simulating analysis that Fig. 1 fails for the glass viscose glue of the embodiment of the present invention.It is now right
A kind of simulating analysis for glass viscose glue failure that the present invention is provided is illustrated.A kind of simulation analysis of glass viscose glue failure
Method, comprises the following steps：
S1：Glass stickie coupon is stretched and shearing test；
S2：Stretching and shearing limit force curve are obtained by the shearing test described in step S1；
S3：Tensile breaking point NFLS and shearing by glass viscose glue described in limiting force curve acquisition described in step S2
Strength degree SFLS；
S4：According to the tensile breaking point obtained in step S3, keyword is with reality defined in analogue simulation software
Existing tensile failure simulation；Or according to the shear defect obtained in step S3, it is crucial defined in analogue simulation software
Word with realize shear fails simulate.
The simulating analysis for a kind of glass viscose glue failure that the present invention is provided, compared with prior art, by glass
Viscose glue failure conditions carry out simulation analysis so that glass cement is connected in complete automobile collision emulation and can sent out with viscose glue in full scale vehicle collision
The situation of raw failure can coincide well, the local deformation pattern of vehicle is differed smaller with experiment, improve the accurate of emulation
Degree.
Tensile breaking point NFLS and shear defect in a kind of embodiment of the present invention, the step S3
The normal stress σ of viscose glue unit in SFLS, the step S4nWith tangential stress σsIf meeting formulaThen
Viscose glue contact failure.
Further, referring to Fig. 2, Fig. 2 is glass in the simulating analysis of the glass viscose glue failure of the embodiment of the present invention
The side view of glass viscose glue simulation model.A kind of a kind of tool of the simulating analysis of the glass viscose glue failure provided as the present invention
The glass stickie coupon in body embodiment, the step S1 includes glass viscose glue and the mobile metallic plate 1 being oppositely arranged
With fixed metal plate 2, the glass viscose glue 3 is arranged between the mobile metallic plate 1 and the fixed metal plate 2.Specifically,
The basic size of mobile metallic plate 1 and fixed metal plate 2 is length of side 100mm square, and the thickness of mobile metallic plate is 1mm
To 3mm, preferably 2mm；The size of glass viscose glue is the cake that radius is 20mm, and thickness is 3mm.In complete automobile collision emulation, only
Need first to carry out stretching and the shearing test of glass stickie coupon, workload is smaller.
A kind of embodiment of the present invention, the glass viscose glue is radius 15mm to 25mm cake, the glass
The thickness of viscose glue is 2mm to 4mm.In the present embodiment, the size of glass viscose glue is the cake that radius is 20mm, and thickness is 3mm.
Glass stickie coupon stretching in a kind of embodiment of the present invention, the step S1, the speed of shearing
Degree is 0.04m/s to 0.06m/s.In the present embodiment, stretching, shear rate are in 0.05m/s.
In a kind of embodiment of the present invention, the step S4, by adhesive area in the analogue simulation software
Grid is processed into hexahedral mesh shape viscose glue unit, and then sets up the contact of adhesive area；The basic size of viscose glue unit is 5mm
To 15mm, preferred size is 10mm.
The object of simulation in a kind of embodiment of the present invention, analogue simulation software is No. 20 body materials.
In the present embodiment, the present invention obtains stretching and the shear defect of glass adhesive by testing, according to experiment
Carry out simulation modeling, the reasonability that checking simulation parameters are set.
Glass viscose glue tensile breaking point according to《The measure of GBT6329-1996 adhesive banjo fixing butt jointing tensile strengths》Enter
Row determine, glass viscose glue shear defect according to《Measure (the rigidity of GB-7124-2008-T- adhesive-tensile shear strength
Material is to rigid material)》It is measured, measures the tensile stress limit for 22.6mpa, the shear stress limit is 16.4mpa.
Specifically, shown in Figure 2, the basic size of mobile metallic plate 1 and fixed metal plate 2 is length of side 100mm
Square, the size of glass viscose glue is the cake that radius is 20mm, and thickness is 3mm.Stretching, shear rate are 0.05m/s, are imitated
1 thickness of very middle mobile metallic plate is 2mm, is simulated using No. 20 body materials of ls-dyna softwares, and metal plate grid needs
Modeled in hyperworks, face in extraction, viscose glue should be 1mm with middle face gap, it is necessary to assure start time, mobile terminal was with gluing
Glue is that, without penetrating, viscose glue is set up using hexahedral mesh in contact, and unit basic size is 10mm, each using bilinearity
Strengthen the elastoplastic property of modeling viscose glue to the same sex, the material property of viscose glue is from experiment.(referring to table 1)
| Modulus of elasticity (Gpa)) | Poisson's ratio | Surrender (Gpa) | Hardening modulus (Gpa) |
| 2.8 | 0.42 | 0.09 | 0.5 |
The material parameter of the viscose glue of table 1
Referring to shown in Fig. 3 to 5, glass glues in the simulating analysis that Fig. 3 fails for the glass viscose glue of the embodiment of the present invention
The contact of glue sets figure；Tensile force-displacement in the simulating analysis that Fig. 4 fails for the glass viscose glue of the embodiment of the present invention is bent
Line chart；Shearing force-displacement curve figure in the simulating analysis that Fig. 5 fails for the glass viscose glue of the embodiment of the present invention.According to
The tensile ultimate strength obtained is tested, * CONTACT_AUTOMATIC_SUR FACE_TO_ are led in ls-dyna softwares
SURFACE_TIEBREAK_ID keywords realize that tensile failure is simulated.Normal stress limit NFLS is set to tension test intensity
Limit 22.6Mpa, tangential stress limit SFLS is set to shearing test strength degree 16.4Mpa.Option elects 2 as.Contact is thick
Degree SST, MST are disposed as zero, represent to use part actual thickness as contact thickness.Tensile force reaches in emulation
Failure is contacted during 24.38KN, limit of stretch power is 28.38KN in experiment, contact is lost when shearing force reaches 18.8KN in emulation
Effect, shears limiting force 20.59KN in experiment.The limiting force of l-G simulation test more meets, it was demonstrated that be connected failure contact reliability compared with
It is good.
The key point of the present invention is as follows：
First, demonstrate ls-dyan be connected failure Contact Algorithm can simulation viscose glue very well failure, the stretching of viscose glue is strong
NFLS and shear strength SFLS is spent from experiment, the normal stress and tangential stress of viscose glue unit is calculated in emulation, if full
Sufficient formulaViscose glue contact is failed.
2nd, key of the invention is that viscose glue starts to contact and can not penetrate, viscose glue with the metal plate of vehicle body
It should be eliminated with the initial breakthrough of metal plate, the material parameter of viscose glue should be from experiment, using bilinearity isotropic hardening model
Simulation.
The present invention is applied in complete automobile collision emulation, it is only necessary to first carry out stretching and the shearing test of glass stickie coupon,
Workload is smaller.The limit force curve of stretching and shearing is obtained by experiment, gluing stretching and shear strength just can be obtained
The limit, by the simple process to adhesive area grid, sets up the contact of adhesive area in hyperworks softwares, it is possible to
Easily realize gluing failure simulation, the present invention implements fairly simple, but the degree of accuracy of emulation can be improved, by reality
The impact test of car shows that this scheme is practical, has reached more satisfactory effect to mark.
Embodiments of the invention are provided for the sake of example and description, and are not exhaustively or by this to send out
It is bright to be limited to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Choosing
Select and describe embodiment and be more preferably to illustrate the principle and practical application of the present invention, and make one of ordinary skill in the art
It will be appreciated that the present invention is so as to design the various embodiments with various modifications suitable for special-purpose.
Claims (10)
1. a kind of simulating analysis of glass viscose glue failure, it is characterised in that comprise the following steps：
S1：Glass stickie coupon is stretched and shearing test；
S2：Stretching and shearing limit force curve are obtained by the shearing test described in step S1；
S3：Pass through the tensile breaking point NFLS and shear strength of glass viscose glue described in limiting force curve acquisition described in step S2
Limit SFLS；
S4：According to the tensile breaking point obtained in step S3, the keyword defined in analogue simulation software is to realize drawing
Stretch crash simulation；Or according to the shear defect obtained in step S3, the keyword defined in analogue simulation software with
Realize that shear fails are simulated.
2. the simulating analysis of glass viscose glue failure according to claim 1, it is characterised in that in the step S3
Tensile breaking point NFLS and the viscose glue unit in shear defect SFLS, the step S4 normal stress σnAnswered with tangential
Power σsIf meeting formulaThen viscose glue contact failure.
3. the simulating analysis of glass viscose glue failure according to claim 1, it is characterised in that in the step S1
The glass stickie coupon includes glass viscose glue and the mobile metallic plate and fixed metal plate that are oppositely arranged, and the glass viscose glue is set
It is placed between the mobile metallic plate and the fixed metal plate.
4. the simulating analysis of glass viscose glue failure according to claim 3, it is characterised in that the mobile metallic plate
Thickness be 1mm to 3mm.
5. the simulating analysis of glass viscose glue according to claim 3 failure, it is characterised in that the glass viscose glue is
Radius 15mm to 25mm cake, the thickness of the glass viscose glue is 2mm to 4mm.
6. the simulating analysis of glass viscose glue failure according to claim 1, it is characterised in that in the step S1
The glass stickie coupon stretching, the speed of shearing are in 0.04m/s to 0.06m/s.
7. the simulating analysis of glass viscose glue failure according to claim 1, it is characterised in that in the step S4,
Adhesive area grid is processed into hexahedral mesh shape viscose glue unit in the analogue simulation software, and then sets up adhesive area
Contact.
8. the simulating analysis of glass viscose glue failure according to claim 7, it is characterised in that the viscose glue unit exists
Modeled in the analogue simulation software, face in extraction, the gap in the viscose glue unit and the middle face is 0.5mm to 1.5mm.
9. the simulating analysis of glass viscose glue failure according to claim 7, it is characterised in that the viscose glue unit
Basic size is 5mm to 15mm.
10. the simulating analysis of glass viscose glue failure according to claim 1, it is characterised in that the analogue simulation
The object of simulation in software is No. 20 body materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710336028.6A CN107202756A (en) | 2017-05-12 | 2017-05-12 | A kind of simulating analysis of glass viscose glue failure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710336028.6A CN107202756A (en) | 2017-05-12 | 2017-05-12 | A kind of simulating analysis of glass viscose glue failure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107202756A true CN107202756A (en) | 2017-09-26 |
Family
ID=59906588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710336028.6A Pending CN107202756A (en) | 2017-05-12 | 2017-05-12 | A kind of simulating analysis of glass viscose glue failure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107202756A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109975205A (en) * | 2018-11-30 | 2019-07-05 | 北京空天技术研究所 | A kind of adhesive asserably performance estimating method |
| CN110220841A (en) * | 2019-06-05 | 2019-09-10 | 吉林大学 | A kind of follow-on bonding test specimen fracture failure stress test method |
| CN111046602A (en) * | 2019-11-27 | 2020-04-21 | 中国第一汽车股份有限公司 | Automobile windshield collision simulation method |
| CN111651881A (en) * | 2020-06-01 | 2020-09-11 | 中国第一汽车股份有限公司 | Method for simplifying lock riveting simulation failure parameters |
| CN112966407A (en) * | 2021-01-28 | 2021-06-15 | 中国汽车技术研究中心有限公司 | Simulation method for rubber-riveting composite connection collision working condition |
| CN115544644A (en) * | 2022-09-13 | 2022-12-30 | 成都飞机工业（集团）有限责任公司 | Adhesive determination method and device for laminated structure, storage medium and equipment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103942441A (en) * | 2014-04-25 | 2014-07-23 | 上海交通大学 | Carbon fiber composite material fatigue life estimating method based on stress ratio influences |
| CN106092774A (en) * | 2016-06-21 | 2016-11-09 | 四川大学 | Test metal and the pilot system of glass viscose glue shear strength |
-
2017
- 2017-05-12 CN CN201710336028.6A patent/CN107202756A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103942441A (en) * | 2014-04-25 | 2014-07-23 | 上海交通大学 | Carbon fiber composite material fatigue life estimating method based on stress ratio influences |
| CN106092774A (en) * | 2016-06-21 | 2016-11-09 | 四川大学 | Test metal and the pilot system of glass viscose glue shear strength |
Non-Patent Citations (1)
| Title |
|---|
| 张永祥: "环氧树脂胶黏剂粘接结构性能的实验和理论研究", 《中国优秀硕士学位论文全文数据库 工程科技I辑》 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109975205A (en) * | 2018-11-30 | 2019-07-05 | 北京空天技术研究所 | A kind of adhesive asserably performance estimating method |
| CN109975205B (en) * | 2018-11-30 | 2022-07-15 | 北京空天技术研究所 | Method for evaluating bonding assembly performance |
| CN110220841A (en) * | 2019-06-05 | 2019-09-10 | 吉林大学 | A kind of follow-on bonding test specimen fracture failure stress test method |
| CN111046602A (en) * | 2019-11-27 | 2020-04-21 | 中国第一汽车股份有限公司 | Automobile windshield collision simulation method |
| CN111046602B (en) * | 2019-11-27 | 2023-01-10 | 中国第一汽车股份有限公司 | Automobile windshield collision simulation method |
| CN111651881A (en) * | 2020-06-01 | 2020-09-11 | 中国第一汽车股份有限公司 | Method for simplifying lock riveting simulation failure parameters |
| CN112966407A (en) * | 2021-01-28 | 2021-06-15 | 中国汽车技术研究中心有限公司 | Simulation method for rubber-riveting composite connection collision working condition |
| CN112966407B (en) * | 2021-01-28 | 2023-02-28 | 中国汽车技术研究中心有限公司 | Simulation method for rubber riveting composite connection collision working condition |
| CN115544644A (en) * | 2022-09-13 | 2022-12-30 | 成都飞机工业（集团）有限责任公司 | Adhesive determination method and device for laminated structure, storage medium and equipment |
| CN115544644B (en) * | 2022-09-13 | 2024-05-14 | 成都飞机工业（集团）有限责任公司 | Method and device for determining adhesive of laminated structure, storage medium and equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107202756A (en) | A kind of simulating analysis of glass viscose glue failure | |
| CN103792143B (en) | Quick acquisition method of true stress strain curve in whole process of uniaxial drawing | |
| CN107092721B (en) | A kind of Residual Strength Assessment method of composite structure containing low-velocity impact damage | |
| CN101122583B (en) | Sheared frame structure damage detection method | |
| CN106092619B (en) | A kind of bonded structure life-span prediction method of high-speed EMUs | |
| CN111753373B (en) | Collision simulation method of automobile foamed plastic material | |
| CN105260536B (en) | The calculation method of welding toe hot spot stress | |
| CN105022860A (en) | Method and system for predicting random vibration life of PCB solder point | |
| CN103823924A (en) | Automobile part steel-to-plastic optimal design method based on CAE simulation technology | |
| CN103278383A (en) | Testing device for compound type cracking of asphalt mixture | |
| CN105022887A (en) | Evaluation method and apparatus for reinforcing bracket of automobile | |
| Yang et al. | Fracture resistance curve over the complete mixed-mode I and II range for 5083 aluminum alloy | |
| CN204789182U (en) | Block of four staight scissors appearance | |
| CN107063901A (en) | The acquisition methods of Fatigue Strength of Concrete curve under a kind of curved scissors stress | |
| CN204439350U (en) | Gearshift endurance testing device | |
| CN108089960B (en) | Method and device for verifying power consumption limiting function of memory | |
| CN106446386B (en) | In mode energy method between mode stiffness of coupling a kind of confining method | |
| CN209802841U (en) | test fixture for simulating tensile-shearing complex stress state of metal plate | |
| CN108387350A (en) | Vehicle body attachment point dynamic stiffness test method, device and storage medium | |
| Haufe et al. | A semi-analytical model for polymers subjected to high strain rates | |
| Yuan et al. | Rheological experimental properties and numerical modeling of a pressure-transmitting silicone rubber used in sheet metal flexible-die forming | |
| CN103246791B (en) | The computing method of vibration damper circular sandwich valve plate circumferential stress under non-uniform distributed pressure | |
| CN105300798B (en) | A kind of method for testing multiple material Irregular Shaped Parts fatigue properties | |
| CN206451781U (en) | Round simulation lead-acid accumulator monomer unit | |
| CN101256844A (en) | Internal memory testing device and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170926 |