CN109406390A - A kind of detection method and its equipment of coating interface bond strength - Google Patents
A kind of detection method and its equipment of coating interface bond strength Download PDFInfo
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Abstract
The invention discloses a kind of detection methods of coating interface bond strength, are related to coating interface bond strength performance detection technical field, comprising the following steps: the related data based on coating and substrate determines the cohesive zone unit of characterization coating interface binding characteristic；The cohesive force abided by based on cohesive zone parameter and cohesive zone unit-opening displacement relationship, is calculated the analog result of anchoring strength of coating；Comparison based on analog result with the test result for obtaining anchoring strength of coating by experiment, obtains the stress index and energy indexes of description coating interface bond strength.The present invention can describe Interface Crack germinating and the overall process along interface extension, and the characterization interfacial combined function index provided is only dependent upon coating material self character, unrelated with sample geometry.
Description
Technical field
The present invention relates to coating interface bond strength performance detection technical fields, and it is strong to particularly relate to a kind of coating interface combination
The detection method and its equipment of degree.
Background technique
To meet specific environmental protection and functional requirement, coating and thin-film material are in modern chain drive and electronic product
In gradually have been widely used.These coating/substrate material systems may be subjected to high temperature, vibration for a long time in use
Dynamic, temperature the joint destruction of environment-load, the indexs such as failure mode, bond strength and use reliability of coating such as is followed and is got over
To get over the attention by engineers and technicians.How accurately to characterize with evaluation coating binding performance, at present there are mainly two types of
Viewpoint: first is that when stress viewpoint, i.e. coating are peeled off from substrate on unit area required power size, generally use bond strength
The parameters such as (including tensile strength and shear strength) and stress intensity factor characterize, wherein tensile strength and shear strength difference
Reflect that the ability stretched with failure by shear is resisted at material system interface, and stress intensity parameter is from linear elastic fracture mechanics
Related concept；Second is that when energetics viewpoint, i.e. coating are peeled off from substrate energy needed for unit area size, including interface is tough
Property and the parameters such as fracture toughness, wherein toughness indicates material from being deformed the energy absorbed to during the entire process of until being broken
Amount, and fracture toughness then characterizes material containing pre- crackle, resists the ability that the pre- crackle further expands.
The currently used means for obtaining bond strength characteristic index mainly include economics analysis method and finite element simulation method,
Such as crack tip stress analysis method, stress intensity factor method, energy release method belong to the reason derived based on mechanical model
By analysis method.The basic ideas of FInite Element are to carry out finite element modeling point according to loading procedure of the test curve to experiment
Analysis and numerical simulation obtain the Stress Field Distribution of the crack initiation moment plane of disruption, therefrom extract peak value characterization coating material and open and split
The stress index of intensity.Inventor has found that prior art characterization and the method for the binding performance of evaluation coating have the following deficiencies:
Although being proved to be effectively using the viewpoint of stress intensity factor, mainly it is applied to the boundary for analyzing macroscopical block materials
In the crack problem of face, coating or thin-film material interface debonding problem for micro-nano magnitude, there are clearly disadvantageous for the theory.
Firstly, interface debonding opens the Stress singularity parameter split dependent on its geometrical characteristic, interface opens that split characterisitic parameter be several with sample
What is relevant；Secondly, although they describe identical boundary material separation failure, obtained control interface crack initiation and expansion
The Roughness Parameter of exhibition is not identical；Third, correlative study discovery, when the relative layer thickness in sample becomes smaller, stress intensity because
The dominates district of son narrows down to the range apart from several microns of interface end, even more small.Under this situation, fracture mechanics concept energy
It is no to continue to be applicable in worth discussion.
Summary of the invention
In view of this, it is an object of the invention to propose the detection method and its equipment of a kind of coating interface bond strength,
So that the calculating of coating interface bond strength does not depend on its geometrical characteristic.
Based on a kind of above-mentioned purpose detection method of coating interface bond strength provided by the invention, comprising the following steps:
Related data based on coating and substrate determines the cohesive zone unit of characterization coating interface binding characteristic；
Coating combination is calculated in the cohesive force abided by based on cohesive zone parameter and cohesive zone unit-opening displacement relationship
The analog result of intensity；
Comparison based on analog result with the test result for obtaining anchoring strength of coating by experiment, obtains description and applies stratum boundary
The stress index and energy indexes of face bond strength.
Optionally, determine characterization coating interface binding characteristic cohesive zone unit the following steps are included:
Collect the related data of coating and substrate；
The finite element mesh model of simulation coating experiments loading condition is generated by the related data of collection；
The cohesive zone unit of characterization coating interface binding characteristic is determined in finite element mesh model.
Optionally, the analog result of anchoring strength of coating is calculated the following steps are included:
Cohesive zone unit information is output in model source file, is adjusted used in FEM calculation in model source file
Control parameter；
Modify cohesive zone unit attribute, and assign characterization cohesive zone element failure normal direction and Tangents Control parameter it is initial
Value；
The cohesive force that cohesive zone unit is abided by-opening displacement transformation is subprogram；
It calls cohesive zone parameter and subprogram to carry out numerical simulation calculation, obtains the displacement or change of load(ing) point characteristic portion
Shape, to obtain the simulation load-displacement curve at the position；
The analog result of anchoring strength of coating is calculated by simulation load-displacement curve.
Optionally, obtain description coating interface bond strength stress index and energy indexes the following steps are included:
Comparative simulation result and test result；
When analog result and test result comparison meet error requirements, determine that cohesive zone parameter can characterize coating interface
Bond strength and fracture property；
Cohesive zone analog result is exported, the stress index and energy indexes of description coating interface bond strength are obtained.
Optionally, the coating and the relevant parameter of substrate include load, boundary condition and the material of coating and base system
Expect performance parameter.
Optionally, it includes cell type, analysis that control parameter used in FEM calculation is adjusted in the model source file
Step-length and convergence precision.
Optionally, the cohesive force-opening displacement relationship is index, bilinearity or the trapezoidal cohesion that cohesive zone unit is abided by
Power-opening displacement relationship.
Optionally, further include following steps:
When analog result and test result comparison are unsatisfactory for error requirements, adjustment cohesive zone parameter is until analog result is full
Sufficient error requirements；
Cohesive zone analog result is exported, the stress index and energy indexes of description coating interface bond strength are obtained.
A kind of electronic equipment of coating interface bond strength, including at least one processor；And with it is described at least one
The memory of processor communication connection；Wherein, the memory is stored with the instruction that can be executed by least one described processor,
Described instruction is executed by least one described processor, so that at least one described processor is able to carry out such as claim 1-8
Method described in any one.
From the above it can be seen that a kind of detection method of coating interface bond strength provided by the invention and its setting
It is standby, for deficiency existing for the current means for obtaining anchoring strength of coating characteristic index, propose to see based on thermodynamics energy balance
The cohesive zone model analysis method of point is more suitable for.For delaminating film destroy finite element modelling practice have shown that, it can be retouched
Interface Crack germinating and the overall process along interface extension are stated, the characterization interfacial combined function index provided is only dependent upon coating material
Self character, it is unrelated with sample geometry.It is constituted according to the parameter of cohesion section model, it can be integrated goes out from stress and energetics viewpoint
Hair can be carried out quantitatively characterizing to the interfacial bonding property of coating/substrate material.Specific step has:
Related data based on coating and substrate determines the cohesive zone unit of characterization coating interface binding characteristic；
Coating combination is calculated in the cohesive force abided by based on cohesive zone parameter and cohesive zone unit-opening displacement relationship
The analog result of intensity；
Comparison based on analog result with the test result for obtaining anchoring strength of coating by experiment, obtains description and applies stratum boundary
The stress index and energy indexes of face bond strength.
By described above the present invention has the advantage that
1) Interface Crack germinating and the overall process along interface extension, the characterization interfacial combined function index provided can be described
It is only dependent upon coating material self character, it is unrelated with sample geometry；
2) it is suitable for describing the coating of micro-nano magnitude or thin-film material interface debonding or breakage problem, tradition can be overcome
The shortcomings and deficiencies of stress intensity factor viewpoint；
It 3) can be from stress and the comprehensive quantitative finger for providing characterization coating/substrate material interface binding performance of energy point of view
Mark.
Detailed description of the invention
Fig. 1 is the flow chart of the detection method and its equipment of a kind of coating interface bond strength of the embodiment of the present invention；
Fig. 2 is a kind of detection method of coating interface bond strength of the embodiment of the present invention and its detail flowchart of equipment；
Fig. 3 is index of embodiment of the present invention cohesive force-Normal Displacement graph of relation；
Fig. 4 is index of embodiment of the present invention cohesive force-tangential displacement graph of relation；
Fig. 5 is bilinearity of embodiment of the present invention cohesive force-Normal Displacement graph of relation；
Fig. 6 is bilinearity of embodiment of the present invention cohesive force-tangential displacement graph of relation；
Fig. 7 is the trapezoidal cohesive force of the embodiment of the present invention-opening displacement graph of relation；
Three kinds of typical simulation curve figures compared with empirical curve when Fig. 8 is Cu layers of linear elasticity of the embodiment of the present invention；
Influence diagram of the interface feature length to analog result when Fig. 9 is Cu layers of linear elasticity of the embodiment of the present invention；
Influence diagram of the cohesive strength to analog result when Figure 10 is Cu layers of linear elasticity of the embodiment of the present invention；
Influence diagram of the cohesive energy ratio to analog result when Figure 11 is Cu layers of linear elasticity of the embodiment of the present invention；
Figure 12 is a kind of detection method of coating interface bond strength of the embodiment of the present invention and its electronic equipment of equipment
The hardware structural diagram of one embodiment.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, and reference
Attached drawing, the present invention is described in more detail.
The application proposes to be based on thermodynamics for deficiency existing for the current means for obtaining anchoring strength of coating characteristic index
Cohesion section model (CZM, Cohesive Zone Model) analysis method of energy balance viewpoint is more suitable for.For film point
The finite element modelling of damage layer practice have shown that, it can describe Interface Crack germinating and the overall process along interface extension, provide
Characterization interfacial combined function index is only dependent upon coating material self character, unrelated with sample geometry.According to cohesion section model
Parameter is constituted, it, which can be integrated, can be carried out quantitatively the interfacial bonding property of coating/substrate material from stress and energetics viewpoint
Characterization.
CZM has been widely used for analog study metal, ceramics, polymer matrix usually as a kind of Macroscopic phenomenological method model
The fracture and Problem of Failure of numerous materials such as composite material, such as the plasticity and creep, the crazing of polymer, gluing of crack tip
Connection, the crackle bridging of composite material, the crack propagation of concrete and binary phase materials interface debonding etc..In order to simplify to complexity
Boundary material is characterized as deferring to the thin layer of a cohesion rule by the analysis of boundary material separation process, cohesion section model.The cohesion
The specific manifestation form of rule is cohesive force-opening displacement curve, shows themselves in that the increase being displaced with interfacial separation, interface
Cohesive force progressivelyes reach maximum value, then gradually reduces, and when interface is kept completely separate, cohesive force disappears.Its basic parameter has cohesion
Intensity, cohesive energy and interface feature length.Wherein, interfacial separation can be the characteristic parameter of boundary material, unrelated with sample geometry.
The driving force of boundary material separation must overcome interfacial separation energy and Plastic dissipative energy.For the rupture failure of different materials, grind
Study carefully personnel and many various forms of cohesion section models have been proposed, the main distinction is cohesive force-opening displacement curve
Shape and the parameter for describing its shape common are rectangle, multinomial, index, trapezoidal, bilinearity equicohesive section model.
In order to obtain the corresponding index of coating interface bond strength using cohesive zone model analysis method, the present invention provides
As shown in Figure 1, a kind of detection method and its equipment of coating interface bond strength, comprising:
Step S101, the related data based on coating and substrate determine the cohesive zone list of characterization coating interface binding characteristic
Member；
Step S102, the cohesive force abided by based on cohesive zone parameter and cohesive zone unit-opening displacement relationship, is calculated
The analog result of anchoring strength of coating；
Step S103 obtains the test result of anchoring strength of coating by experiment；
Step S104, the comparison based on analog result and test result obtain the stress of description coating interface bond strength
Index and energy indexes.
As can be seen from the above embodiments, how the detection method needle of the coating interface bond strength accurately characterizes and evaluate
The binding performance of coating is calculated by the cohesive force-opening displacement relationship abided by based on cohesive zone parameter and cohesive zone unit
Analog result and test result to anchoring strength of coating compare, and obtain the stress index and energy of description coating interface bond strength
Figureofmerit.To further obtain the overall process that can be described Interface Crack germinating and extend along interface, while the characterization provided
Interfacial combined function index is only dependent upon coating material self character, unrelated with sample geometry.
As shown in Fig. 2, optional, determine the cohesive zone unit of characterization coating interface binding characteristic the following steps are included:
Step S201 collects the related data of coating and substrate；
Step S202 generates the finite element grid mould of simulation coating experiments loading condition by the related data of collection
Type；
Step S203 determines the cohesive zone unit of characterization coating interface binding characteristic in finite element mesh model.
Optionally, the analog result of anchoring strength of coating is calculated the following steps are included:
Cohesive zone unit information is output in model source file by step S301, adjusts finite element in model source file
Calculate control parameter used；
Step S302, modifies the attribute of cohesive zone unit, and assigns the normal direction and tangential control of characterization cohesive zone element failure
Initial parameter value processed；
Step S303, the cohesive force that cohesive zone unit is abided by-opening displacement transformation are subprogram；
Step S304 calls cohesive zone parameter and subprogram to carry out numerical simulation calculation, obtains load(ing) point characteristic portion
Displacement or deformation, to obtain the simulation load-displacement curve at the position；
The analog result of anchoring strength of coating is calculated by simulation load-displacement curve by step S305；
Optionally, obtain description coating interface bond strength stress index and energy indexes the following steps are included:
Step S401, comparative simulation result and test result；
Step S402 determines that cohesive zone parameter being capable of table when analog result meets error requirements with test result comparison
Levy the bond strength and fracture property of coating interface；
Step S403 exports cohesive zone analog result, obtains the stress index and energy of description coating interface bond strength
Index.
Optionally, the coating and the relevant parameter of substrate include load, boundary condition and the material of coating and base system
Expect performance parameter.
Optionally, it includes cell type, analysis that control parameter used in FEM calculation is adjusted in the model source file
Step-length and convergence precision.
Optionally, the cohesive force-opening displacement relationship is index, bilinearity or the trapezoidal cohesion that cohesive zone unit is abided by
Power-opening displacement relationship.
When index cohesive force-opening displacement that cohesive force-opening displacement relationship is abided by step S102 for cohesive zone unit
When relationship, index cohesion section model usually defines a cohesive force potential function:
Wherein, q=φt/φn,φnAnd φtRespectively interface normal direction and tangential cohesive energy；ΔnAnd ΔtPoint
It Wei not interface normal direction and tangential displacement spacing；δnAnd δtRespectively interface normal direction and tangential nature length；It is interface pure
The Normal Displacement critical value of failure moment under shear state.Interface normal direction and tangential cohesive force can determine according to the following formula:
Formula (1) substitution above formula can be obtained:
Correspondingly, the maximum (normal) stress σ of normal direction cohesive energy and tangential cohesive energy and interfacemaxWith maximum shear stress τmaxHave
It closes, is respectively as follows:
Work as ΔtWhen=0, normal direction cohesive force-Normal Displacement relation curve can be obtained by formula (3), as shown in Figure 3；Work as Δn=
When 0, tangential cohesive force-tangential displacement curve can be obtained, Fig. 4 is illustrated in.
When bilinearity cohesive force-opening position that cohesive force-opening displacement relationship is abided by step S102 for cohesive zone unit
When shifting relationship, bilinearity cohesion section model, according to the model, interface normal direction cohesive force and tangential cohesive force are the double of displacement
Linear function, specific relationship are as follows: interface normal direction and be tangentially relationship, which defers to following sheet
Structure relationship:
Work as δnWhen > 0,
Work as δnWhen=0,
Here, σmaxAnd τmaxRespectively interface normal strength and tangential intensity；δmaxFor interface feature length；WithPoint
Not Wei interface it is entirely ineffective when critical normal direction and tangential displacement；δn、δtIt is respectively normal direction after normalized with δ, tangential
With equivalent displacement spacing, it is defined as follows:
In pure extension (Δt=0) and pure shear (Δn=0) under situation, the normal direction cohesive force-of bilinearity cohesive zone model
Displacement curve and tangential cohesion force-displacement curve are as shown in Figure 5 and Figure 6.Corresponding normal direction cohesive energy φnWith tangential cohesive energy
φtIt is respectively as follows:
When trapezoidal cohesive force-opening displacement that cohesive force-opening displacement relationship is abided by step S102 for cohesive zone unit
When relationship, Normal Displacement and the merging of tangential displacement group are defined a nondimensional split displacement by trapezoidal cohesion section model joins
Number, i.e.,
And it is assumed that interface upper stress is reduced to zero as δ=1.In formula (11)WithRespectively normal direction and tangential
The critical value of displacement.Then, then by being defined as follows potential function:
So that it is determined that interface normal direction and tangential cohesive force, relational expression are respectively as follows:
In pure extension state, the normal direction maximum stress at interface is σmax, the tangential maximum stress at interface isAs δ=1, the separation energy of unit area on interface, i.e. cohesive energy Γ can be obtained by formula (12)0.According to
Fig. 7, it is available,
A kind of detection method of coating interface bond strength, further includes following steps:
When analog result and test result comparison are unsatisfactory for error requirements, adjustment cohesive zone parameter is until analog result is full
Sufficient error requirements；
Cohesive zone analog result is exported, the stress index and energy indexes of description coating interface bond strength are obtained.
By constantly adjusting adjustment cohesive zone parameter until analog result meets error requirements, so that analog result is more
It is accurate, this method is suitable for describing the coating or thin-film material interface debonding or breakage problem of micro-nano magnitude, can overcome
The shortcomings and deficiencies of traditional stress intensity factor viewpoint.
In order to further implement this method, consider first using Cu film layer as linear elastic materials, Lai Kaizhan in the present invention
Corresponding CZM simulation calculates.Table 1-1 lists the elastic constant of cohesive force simulation nanocantilever material used.Here false
If layers of material defers to linear elastic deformation rule, wherein Cu layers of elasticity modulus 129GPa, Poisson's ratio 0.34.Cohesion section model
Main characteristic parameters have cohesive strength, cohesive energy and interface feature length.In simulation calculates, by setting different features
Parameter adjusts the mechanical property at interface, make to simulate calculated result and experimental result close to.Assuming that Cu layers of nanometer are abided by
When keeping linear elasticity rule, index, bilinearity and trapezoidal cohesion section model is respectively adopted, Si/Cu film interface delamination failure is carried out
Simulation.Find that calculated result is more sensitive to cohesive strength and the cohesive energy ratio, less to interface feature length by a large amount of tentative calculations
It is sensitive.For every kind of model, is respectively chosen by setting cohesive strength value and compared with the simulation curve represented with empirical curve
Compared with.Fig. 8 gives the typical simulation of three classes CZMs as a result, the label in figure such as " E280MPa " indicates that cohesive strength max is equal to
The simulation curve that 280MPa and using index CZM when obtain；" B440MPa " indicates σmaxWhen=440MPa, bilinearity CZM is used
Obtained simulation curve；" T370MPa " indicates σmaxWhen=370MPa, the simulation curve that is obtained using trapezoidal CZM.As can be seen that
Bilinearity and the analog result of trapezoidal CZM and empirical curve difference are larger, and in comparison, index CZM is more suitable for studying
The delamination failure problem of the film interface.
Table 1-1 simulation calculates elastic properties of materials constant used
Emphasis is directed to index CZM below, further adjusts its cohesion parameter amplitude, excellent by carrying out with experimental result comparison
Change, obtains the optimized parameter index of characterization interfacial combined function.It, will in this research under the premise of guaranteeing that calculating process is constringent
The reasons why interface feature length is taken as 0.004 μm, this selection will be illustrated with Fig. 9.It is in figure the result is that taking σmax=
280MPa and q=1, successively change interface feature length δn=δtObtained from 0.003 μm, 0.004 μm and 0.005 μm.At this time
Corresponding cohesive energy φn=φtRespectively 2.28J/m2,3.05J/m2 and 3.81J/m2.Label in figure, such as " 280-0.004-
3.05 " expression cohesive strengths are equal to 280MPa, characteristic length and take 0.004 μm, calculated result of cohesive energy when being 3.05J/m2, remaining
Analogize；Data point labeled as " Experiment " is quoted from the experimental result in document, similarly hereinafter.It can be seen that interface feature
Length δn=δt=0.004 μm closer to experimental point.In comparison, influence of the cohesive strength parameter to calculated result be more
It is significant.According to the relationship and a large amount of tentative calculation of cohesive strength and material yield strength, in this research, by normal direction cohesive strength
σmaxIt is taken as 260MPa, 270MPa and 280MPa respectively, and by interface is tangential and the ratio between normal direction cohesive energy q=φt/φnIt is taken as 1.
According to formula, corresponding cohesive energy is respectively 2.83J/m2,2.94J/m2 and 3.05J/m2.It can be seen from fig. 10 that simulation P- δ
Curve is to cohesive strength σmaxChange more sensitive.Tentative calculation discovery, works as σmaxWhen lower than 260MPa, simulation curve can substantial deviation reality
Curve is tested, if more low value is taken to will lead to the diverging of iterative solution process and be unable to complete calculating.With the increase of cohesive strength, mould
Pseudocurve is moved closer in empirical curve.When cohesive strength be equal to 260MPa and 270MPa when calculated curve major part line segment and
Empirical curve is close, but destroys the moment in adjacent interface, and the deviation of the two is larger.It is found in simulation, calculated curve deviates real
It tests curved portion and corresponds to crackle along interface extension phase.Work as σmaxWhen=280MPa, simulation curve is relatively real on the whole
It tests a little, and the breaking load and experiment value that obtain are more identical.Work as σmaxWhen more than 280MPa, although calculated curve still close to
Empirical curve, but cannot achieve Interface Crack germinating and extended along interface.
The ratio between cohesive energy q=φt/φnInfluence of the parameter to analog result is as shown in figure 11.σ is enabled in figuremax=280MPa,
δn=0.004 μm and φn=3.0464J/m2, successively changing parameter q is 0.5,1,2 and 5.Known by formula, is corresponding with δt=0.002 μ
M, 0.004 μm, 0.008 μm and 0.02 μm, φt=1.52J/m2,3.05J/m2,6.09J/m2,15.23J/m2.As can be seen that
Relatively experimental point, the two essentially coincide two simulation curves of the cohesive energy ratio q=0.5 and q=1, only carry in final destroy
He Chu has some differences；The simulation curve of q=2 is generally also more conform with, but excessively relatively low to the prediction of breaking load；q
=5 simulation curve then deviates considerably from experimental point.Discovery is calculated, when one timing of cohesive strength, the cohesive energy ratio q increase means to cut
Increase to cohesive energy, i.e., tangential interface feature length increases.It is reflected in this structure of tangential cohesive force-opening displacement, is exactly interface
The stress softening stage is elongated.This can bring interface tangential displacement and cantilever beam end displacement δ to increase, and show as under same load level
The other curves of Displacement Ratio are bigger, and calculated result is made to deviate empirical curve.In comparison, choose q=1 when analog result more
Rationally.
To sum up, it is strong that all parameters of cohesion model determined when Cu film layer defers to linear elasticity constitutive relation are respectively as follows: cohesion
Spend σmax=280MPa, interface feature length δn=δt=0.004 μm, it is broken cohesive energy φn=φt=3.05J/m2.
The second aspect of the embodiment of the present invention proposes and a kind of executes the coating interface bond strength detection method
One embodiment of electronic equipment.
Figure 12 shows the electronic equipment provided by the invention for executing the coating interface bond strength detection method
The hardware structural diagram of one embodiment.
The electronic equipment for executing the coating interface bond strength, including at least one processor；And with it is described
The memory of at least one processor communication connection；Wherein, the memory, which is stored with, to be held by least one described processor
Capable instruction, described instruction are executed by least one described processor, so that at least one described processor is able to carry out as above
Any one described method.
It include that a processor 401 and one deposit in the electronic equipment by taking electronic equipment as shown in figure 12 as an example
Reservoir 402, and can also include: input unit 403 and output device 404.
Processor 401, memory 402, input unit 403 and output device 404 can pass through bus or other modes
It connects, in Figure 12 for being connected by bus.
Memory 402 is used as a kind of non-volatile computer readable storage medium storing program for executing, can be used for storing non-volatile software journey
Sequence, non-volatile computer executable program and module, such as the calculating of the program of mobile terminal in the embodiment of the present application
Corresponding program instruction/the module of moving method.The non-volatile software that processor 401 is stored in memory 402 by operation
Program, instruction and module, thereby executing the various function application and data processing of server, i.e. the realization above method is implemented
The computation migration method of the program of mobile terminal of example.
Memory 402 may include storing program area and storage data area, wherein storing program area can store operation system
Application program required for system, at least one function；Storage data area can be stored to be filled according to the computation migration of program of mobile terminal
That sets uses created data etc..In addition, memory 402 may include high-speed random access memory, it can also include non-
Volatile memory, for example, at least a disk memory, flush memory device or other non-volatile solid state memory parts.?
In some embodiments, optional memory 402 includes the memory remotely located relative to processor 401.The example of above-mentioned network
Including but not limited to internet, intranet, local area network, mobile radio communication and combinations thereof.
Input unit 403 can receive the number or character information of input, and the calculating generated with program of mobile terminal is moved
The related key signals input of the user setting and function control of moving device.Output device 404 may include that the displays such as display screen are set
It is standby.
One or more of modules are stored in the memory 402, when being executed by the processor 401, are held
The computation migration method of program of mobile terminal in the above-mentioned any means embodiment of row.
Any one embodiment of the electronic equipment of the computation migration method for executing the program of mobile terminal, can be with
Achieve the effect that corresponding aforementioned any means embodiment is identical or similar.
Those of ordinary skill in the art will appreciate that realizing all or part of the process in above-described embodiment method, being can be with
Related hardware is instructed to complete by computer program, the program can be stored in a computer-readable storage medium
In, the program is when being executed, it may include such as the process of the embodiment of above-mentioned each method.Wherein, the storage medium can be magnetic
Dish, CD, read-only memory (Read-OnlyMemory, ROM) or random access memory
(RandomAccessMemory, RAM) etc..The embodiment of the computer program can achieve corresponding aforementioned any
The identical or similar effect of embodiment of the method.
In addition, being also implemented as the computer program executed by CPU, the computer program according to disclosed method
It may be stored in a computer readable storage medium.When the computer program is executed by CPU, executes and limited in disclosed method
Fixed above-mentioned function.
In addition, above method step and system unit also can use controller and for storing so that controller is real
The computer readable storage medium of the computer program of existing above-mentioned steps or Elementary Function is realized.
Those skilled in the art will also understand is that, various illustrative logical blocks, mould in conjunction with described in disclosure herein
Block, circuit and algorithm steps may be implemented as the combination of electronic hardware, computer software or both.It is hard in order to clearly demonstrate
This interchangeability of part and software, with regard to various exemplary components, square, module, circuit and step function to its into
General description is gone.This function is implemented as software and is also implemented as hardware depending on concrete application and application
To the design constraint of whole system.Those skilled in the art can realize described in various ways for every kind of concrete application
Function, but this realization decision should not be interpreted as causing a departure from the scope of the present disclosure.
Various illustrative logical blocks, module and circuit, which can use, in conjunction with described in disclosure herein is designed to
The following component of function described here is executed to realize or execute: general processor, digital signal processor (DSP), dedicated collection
At circuit (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, divide
Any combination of vertical hardware component or these components.General processor can be microprocessor, but alternatively, processing
Device can be any conventional processors, controller, microcontroller or state machine.Processor also may be implemented as calculating equipment
Combination, for example, the combination of DSP and microprocessor, multi-microprocessor, one or more microprocessors combination DSP core or any
Other this configurations.
It should be understood by those ordinary skilled in the art that: the discussion of any of the above embodiment is exemplary only, not
It is intended to imply that the scope of the present disclosure (including claim) is limited to these examples；Under thinking of the invention, above embodiments
Or can also be combined between the technical characteristic in different embodiments, step can be realized with random order, and be existed such as
Many other variations of the upper different aspect of the invention, for simplicity, they are not provided in details.
Claims (9)
1. a kind of detection method of coating interface bond strength, which comprises the following steps:
Related data based on coating and substrate determines the cohesive zone unit of characterization coating interface binding characteristic；
The cohesive force abided by based on cohesive zone parameter and cohesive zone unit-opening displacement relationship, is calculated anchoring strength of coating
Analog result；
Comparison based on analog result with the test result for obtaining anchoring strength of coating by experiment, obtains description coating interface knot
Close the stress index and energy indexes of intensity.
2. a kind of detection method of coating interface bond strength according to claim 1, which is characterized in that determine that characterization applies
The cohesive zone unit of bed boundary binding characteristic the following steps are included:
Collect the related data of coating and substrate；
The finite element mesh model of simulation coating experiments loading condition is generated by the related data of collection；
The cohesive zone unit of characterization coating interface binding characteristic is determined in finite element mesh model.
3. a kind of detection method of coating interface bond strength according to claim 1, which is characterized in that painting is calculated
Layer bond strength analog result the following steps are included:
Cohesive zone unit information is output in model source file, control used in FEM calculation is adjusted in model source file
Parameter；
The attribute of cohesive zone unit is modified, and assigns the normal direction and Tangents Control initial parameter value of characterization cohesive zone element failure；
The cohesive force that cohesive zone unit is abided by-opening displacement transformation is subprogram；
It calls cohesive zone parameter and subprogram to carry out numerical simulation calculation, obtains the displacement or deformation of load(ing) point characteristic portion, from
And obtain the simulation load-displacement curve at the position；
The analog result of anchoring strength of coating is calculated by simulation load-displacement curve.
4. a kind of detection method of coating interface bond strength according to claim 1, which is characterized in that obtain description and apply
The stress index and energy indexes of bed boundary bond strength the following steps are included:
Comparative simulation result and test result；
When analog result and test result comparison meet error requirements, determine that cohesive zone parameter can characterize the knot of coating interface
Close intensity and fracture property；
Cohesive zone analog result is exported, the stress index and energy indexes of description coating interface bond strength are obtained.
5. a kind of detection method of coating interface bond strength according to claim 1, which is characterized in that the coating and
The relevant parameter of substrate includes load, boundary condition and the material property parameter of coating and base system.
6. a kind of detection method of coating interface bond strength according to claim 1, which is characterized in that the model source
It includes cell type, analysis step-length and convergence precision that control parameter used in FEM calculation is adjusted in file.
7. a kind of detection method of coating interface bond strength according to claim 1, which is characterized in that the cohesion
Power-opening displacement relationship is index, bilinearity or the trapezoidal cohesive force-opening displacement relationship that cohesive zone unit is abided by.
8. a kind of detection method of coating interface bond strength according to claim 1, which is characterized in that further include as follows
Step:
When analog result and test result comparison are unsatisfactory for error requirements, adjustment cohesive zone parameter is until analog result satisfaction is missed
Difference requires；
Cohesive zone analog result is exported, the stress index and energy indexes of description coating interface bond strength are obtained.
9. a kind of electronic equipment of coating interface bond strength, which is characterized in that including at least one processor；And with it is described
The memory of at least one processor communication connection；Wherein, the memory, which is stored with, to be held by least one described processor
Capable instruction, described instruction are executed by least one described processor, so that at least one described processor is able to carry out such as power
Benefit requires method described in 1-8 any one.
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Application publication date: 20190301 |