CN110472307A - A kind of display system optical cement removing emulation mode - Google Patents
A kind of display system optical cement removing emulation mode Download PDFInfo
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- CN110472307A CN110472307A CN201910686513.5A CN201910686513A CN110472307A CN 110472307 A CN110472307 A CN 110472307A CN 201910686513 A CN201910686513 A CN 201910686513A CN 110472307 A CN110472307 A CN 110472307A
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- display system
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- optical cement
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
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Abstract
The invention discloses a kind of display system optical cements to remove emulation mode, comprising: establishes the finite element model of display system；Elasticity modulus, Poisson's ratio, linear expansion coefficient are obtained by the mechanics physical property table of optical cement and component, above-mentioned parameter is loaded into the constitutive equation under each corresponding component grid, and boundary is carried out to the finite element model according to display system actual installation in pre-processing software and is fixed, complete and export the finite element model of format required for finite element analysis software；The finite element model that previous step is imported in finite element analysis software establishes Implicit Static and calculates analysis step, opens nonlinear switching；Setting global finite element model initial temperature is walked in initial analysis；High temperature or low temperature load are loaded in Implicit Static analysis step, destination file is obtained by FEM calculation, obtain whether the thickness optical glue under the structure can occur high/low temperature removing.Have the advantages that at low cost, high-efficient, effect is good using the technical solution.
Description
Technical field
The present invention relates to field of display technology, in particular to a kind of display system optical cement removes emulation mode.
Background technique
It is to be attached using the full applying method of optical cement at present in display system, between backlight and touch screen, but light
Learning glue adhesive strength under high and low temperature can decline, and optical cement is caused to be removed in bonding plane, and conventional method is first to design, again
Then sample preparation carries out experimental verification, if the removing of optical cement occurs in experiment, then goes modification to design, increase optical cement thickness with
The possibility for occurring removing is reduced, then goes to test again, is recycled with this until not occurring optical cement removing in experiment.
Conventional method lacks data and supports, overall structure is different, and required optical cement thickness is different, and experience is difficult to inherit, from
It is designed into sample preparation, then to verifying, time-consuming, it is at high cost, and a modification twice may not be able to achieve the desired results.
Summary of the invention
The embodiment of the present invention is designed to provide a kind of display system optical cement removing emulation mode, have it is at low cost,
Advantage high-efficient, effect is good.
A kind of display system optical cement provided in an embodiment of the present invention removes emulation mode, comprising:
The 3D model of foundation is imported into finite-element preprocessing software, the finite element model of display system is established；
Elasticity modulus, Poisson's ratio, linear expansion coefficient are obtained by the mechanics physical property table of optical cement and component, by above-mentioned parameter
Be loaded into the constitutive equation under each corresponding component grid, and in pre-processing software according to display system actual installation to described
Finite element model carries out boundary and fixes, and completes and export the finite element model of format required for finite element analysis software；
The finite element model that previous step is imported in finite element analysis software establishes Implicit Static and calculates analysis step,
Open nonlinear switching；
Setting global finite element model initial temperature is walked in initial analysis；
High temperature or low temperature load are loaded in Implicit Static analysis step, and destination file is obtained by FEM calculation,
It reuses the poster processing soft and extracts optical cement bearing stress and shear stress in destination file；
The negative value of compression is that the shearing strength of the tensile strength comparison of tensile stress and glue, shear stress and glue carries out pair
Than can be obtained whether the thickness optical glue under the structure can occur high/low temperature removing, if tensile stress is more than optics glue sticking
Tensile strength or shear stress be more than optics glue sticking shearing strength, then optical cement in an experiment can be peeling-off, needs
Re-start design.
Optionally, the ProE 3D model established is imported into finite-element preprocessing software, is established by pre-processing software
The finite element model of display system.
Optionally, optical cement is modeled using three layers of single order hexahedron solid element, and aspect ratio control is 4 hereinafter, to essence
Really calculate compression and shear stress.
Optionally, the plastic casing of display system is modeled using second order tetrahedron element, is collapsed than control 0.15 or more.
Optionally, metal plate and touch screen use shell unit, and Jacobi is controlled 0.6 or more.
Optionally, 90 DEG C of high temperature or -40 DEG C of low temperature load are loaded in Implicit Static analysis step.
Optionally, global finite element model initial temperature is set as 25 DEG C in initial analysis step.
Therefore it can basis due to using the removing of emulation mode analysis optical cement using the present embodiment technical solution
Simulation result determines whether there is removing risk, compared with experimental method, has the advantages that at low cost, high-efficient, effect is good.
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 without any creative labor, may be used also for those of ordinary skill in the art
To obtain other drawings based on these drawings.
Fig. 1 is to remove emulation side under a kind of display system optical cement high/low temperature based on finite element software provided by the invention
Method flow chart；
Fig. 2 is a kind of 90 DEG C of simulation results provided by the invention；
Fig. 3 is a kind of -40 DEG C of simulation results provided by the invention；
Fig. 4 is 1-4 point simulation result statistics in Fig. 2 and Fig. 3；
Fig. 5 is optical cement peeling in a kind of corresponding experiment provided by the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Embodiment:
Emulation mode is removed under the display system optical cement high/low temperature based on finite element software that the present embodiment provides a kind of, such as
Shown in Fig. 1:
The ProE 3D model established is imported into finite-element preprocessing software, display system is established by pre-processing software
Finite element model；Optical cement is modeled using three layers of single order hexahedron solid element, and aspect ratio is controlled to 4 hereinafter, to accurate
It calculates compression and shear stress, plastic casing to model using second order tetrahedron element, collapse than control 0.15 or more, metal plate and touching
Screen is touched using shell unit, Jacobi control is 0.6 or more, to eliminate influence of the mesh quality to detail rigidity as possible.
Elasticity modulus, Poisson's ratio, linear expansion coefficient are obtained by the mechanics physical property table of optical cement and structure other parts, it will
Above-mentioned parameter is loaded into the constitutive equation under the grid of each corresponding part, and according to display system reality in pre-processing software
Installation carries out boundary to finite element model and fixes, and completes and export the finite element model of format required for finite element analysis software.
The finite element model that previous step is imported in finite element analysis software divides establishing Implicit Static (static) and calculating
Analysis step, opens nonlinear switching.
Giving global finite element model initial temperature in initial analysis step is 25 DEG C.90 are loaded in Implicit Static analysis step
DEG C high temperature or -40 DEG C of low temperature load, obtain destination file by FEM calculation, reuse the poster processing soft and extract result text
Optical cement bearing stress and shear stress in part.
The negative value of compression is that the shearing strength of the tensile strength comparison of tensile stress and glue, shear stress and glue carries out pair
Than whether the thickness optical glue can be obtained under the structure can there is a situation where high/low temperatures to remove.If tensile stress is more than optics
The tensile strength or shear stress of glue sticking are more than the shearing strength of optics glue sticking, then it is assumed that optical cement can be sent out in an experiment
Raw removing, needs to re-start design, with the new method that this emulate-is tested again using the design-emulation-optimization-, instead of
Traditional design-sample preparation-experiment-optimization-out-of-date methods that sample preparation-is tested again again reduces sample preparation fund cost, and entirely grinds
The time cost of hair.
The optical cement compression that emulates and shear stress, Fig. 3 (a), (b) are imitative when being -40 DEG C when such as Fig. 2 (a), (b) being 90 DEG C
Genuine optical cement compression and shear stress, as shown in figure 4, maximum tension stress is 0.02MPa at 90 DEG C, higher than optical cement at this time
The tensile strength 0.0157MPa of bonding；Maximum shear stress is 0.025MPa at -40 DEG C, higher than the shearing resistance of optics glue sticking at this time
Intensity 0.02MPa；And position is identical with experimental phenomena.Fig. 5 is that the optical cement removing that high and low temperature occurs in actual experiment is existing
As.The failure of this method prediction and experimental result are completely the same.
Embodiments described above does not constitute the restriction to the technical solution protection scope.It is any in above-mentioned implementation
Made modifications, equivalent substitutions and improvements etc., should be included in the protection model of the technical solution within the spirit and principle of mode
Within enclosing.
Claims (7)
1. a kind of display system optical cement removes emulation mode characterized by comprising
The 3D model of foundation is imported into finite-element preprocessing software, the finite element model of display system is established；
Elasticity modulus, Poisson's ratio, linear expansion coefficient are obtained by the mechanics physical property table of optical cement and component, above-mentioned parameter is loaded
In constitutive equation under to each corresponding component grid, and in pre-processing software according to display system actual installation to described limited
Meta-model carries out boundary and fixes, and completes and export the finite element model of format required for finite element analysis software；
The finite element model that previous step is imported in finite element analysis software establishes Implicit Static and calculates analysis step, opens
Nonlinear switching；
Setting global finite element model initial temperature is walked in initial analysis；
High temperature or low temperature load are loaded in Implicit Static analysis step, and destination file is obtained by FEM calculation,
It reuses the poster processing soft and extracts optical cement bearing stress and shear stress in destination file；
The negative value of compression is that the shearing strength of tensile strength comparison, shear stress and the glue of tensile stress and glue compares,
It can be obtained whether the thickness optical glue under the structure can occur high/low temperature removing, if tensile stress is more than the anti-of optics glue sticking
Tensile strength or shear stress are more than the shearing strength of optics glue sticking, then optical cement in an experiment can be peeling-off, needs again
It is designed.
2. a kind of display system optical cement as described in claim 1 removes emulation mode, which is characterized in that establish ProE
3D model is imported into finite-element preprocessing software, and the finite element model of display system is established by pre-processing software.
3. a kind of display system optical cement as claimed in claim 2 removes emulation mode, which is characterized in that optical cement uses three
Layer single order hexahedron solid element modeling, aspect ratio control is 4 hereinafter, to accurately calculate compression and shear stress.
4. a kind of display system optical cement as claimed in claim 3 removes emulation mode, which is characterized in that the modeling of display system
Rubber shell is modeled using second order tetrahedron element, is collapsed than control 0.15 or more.
5. a kind of display system optical cement as claimed in claim 4 removes emulation mode, which is characterized in that metal plate and touch screen
Using shell unit, Jacobi is controlled 0.6 or more.
6. a kind of display system optical cement as claimed in claim 5 removes emulation mode, which is characterized in that in Implicit Static point
90 DEG C of high temperature or -40 DEG C of low temperature load are loaded in analysis step.
7. a kind of display system optical cement as claimed in claim 6 removes emulation mode, which is characterized in that walked in initial analysis
Global finite element model initial temperature is set as 25 DEG C.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112798442A (en) * | 2020-12-11 | 2021-05-14 | 合肥维信诺科技有限公司 | Device and method for testing normal fatigue of rubber material |
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