CN106250595A - Materials hot working whole process heating power stream microstructure multiple physical field numerical computation method - Google Patents
Materials hot working whole process heating power stream microstructure multiple physical field numerical computation method Download PDFInfo
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Abstract
The invention discloses materials hot working whole process heating power stream microstructure multiple physical field numerical computation method, comprise the following steps: build solidification simulation technique to forging simulation process and the one-way interfaces of heat treatment simulation process, build the bidirectional interface of forging simulation process, welding analog technique and panel beating simulation process three and heat treatment simulation process, and build the bidirectional interface of welding analog technique and panel beating simulation process；By the stress calculating results data of solidification simulation technique by one-way interfaces transmission to forging simulation process and heat treatment simulation process；Forging simulation process, welding analog technique and panel beating simulation process three are carried out stress calculating results data transmission with heat treatment simulation process；Step 4, welding analog technique and panel beating simulation process are carried out stress calculating results data transmission.Present invention achieves the coupling of heat processing technique flow process chain, the goodness of fit of analog reslt and actual condition can be promoted.
Description
Technical field
The present invention relates to materials processing thermal process analogue technique, specifically materials hot working whole process heating power stream microstructure
Multiple physical field numerical computation method.
Background technology
Materials processing thermal process includes solidifying, forges, welds, heat treatment and five kinds of techniques of panel beating, realizes material at present and adds
During work thermal technology simulation test, materials processing thermal process numerical computation method is mainly decoupled method independent to each technique,
I.e. simulate calculating respectively for above-mentioned five kinds of techniques, respectively obtain the analog result of each technique.The principle of said method is root
Carry out simplifying and setting up numerical model according to each technique own characteristic, boundary condition is set according to actual process situation, then profit
Calculate with respective or general solver, obtain the single analog result of each technique.
Use aforesaid way to be simulated test, there is no any association and result data transmission between technique, each other
Being isolated, this causes analog reslt relatively low with the goodness of fit of actual condition, can have a strong impact on simulation precision and material adds
The credibility that the simulation of work thermal process calculates.
Summary of the invention
It is an object of the invention to solve current materials processing thermal technology simulation test to each technique individually substep meter
Calculate the technical problem causing analog reslt relatively low with the actual condition goodness of fit, it is provided that a kind of materials hot working whole process heat
Power stream microstructure multiple physical field numerical computation method, makes the hot worked five kinds of technique numerical simulations isolated during its application
It is coupled by transmission and the reading of stress calculating results data, it is achieved that the coupling of heat processing technique flow process chain, energy
Promote the goodness of fit of analog reslt and actual condition.
The present invention solves the problems referred to above and is achieved through the following technical solutions: materials hot working whole process heating power stream microcosmic
Tissue multiple physical field numerical computation method, comprises the following steps:
Step one, structure solidification simulation technique, to forging simulation process and the one-way interfaces of heat treatment simulation process, build forging
Simulation process, welding analog technique and panel beating simulation process three and the bidirectional interface of heat treatment simulation process, and build welding
Simulation process and the bidirectional interface of panel beating simulation process；
Step 2, one-way interfaces of the stress calculating results data of solidification simulation technique being passed through are transmitted and are extremely forged simulation process and heat
Process simulation process；
Step 3, forging simulation process, the stress calculating results data of welding analog technique and panel beating simulation process three are led to
Cross bidirectional interface to transmit to heat treatment simulation process, or the stress calculating results data of heat treatment simulation process are connect by two-way
Oral instructions are transported to forge mould and are intended technique, welding analog technique and panel beating simulation process；
Step 4, by the stress calculating results data of welding analog technique by bidirectional interface transmit to panel beating simulation process, or
The stress calculating results data of panel beating simulation process are transmitted to welding analog technique by bidirectional interface.The operation stream of the present invention
Cheng Shunxu and actual process flow process sequence consensus, wherein, the operation having bidirectional interface can operation up and down each other.
Further, the stress calculating results data sending data side's simulation process are passed by described step 2～step 4
Transport to specifically include when receiving data side's simulation process following steps: the ess-strain result of data side's simulation process will be sent,
According to the pre-treatment form of reception data side simulation process, utilize inquiry contrast and optimal algorithm to carry out node selection and read with result
Take, and make grid node corresponding with result data, carry out the seamless coupling link of two kinds of techniques, it is achieved send data side's simulation work
The stress calculating results data transmission of skill is to receiving in data side's simulation process.The present invention in the specific implementation, by solidification simulation
When the stress calculating results data of technique are by one-way interfaces transmission to forging simulation process, solidification simulation technique is as sending number
According to square simulation process, forging simulation process is as receiving data side's simulation process；Stress calculating results by solidification simulation technique
When data are transmitted to heat treatment simulation process by one-way interfaces, solidification simulation technique is as sending data side's simulation process, hot
Process simulation process as receiving data side's simulation process.The present invention between two simulation process equipped with bidirectional interface time, such as:
When the stress calculating results data of welding analog technique are transmitted to panel beating simulation process by bidirectional interface, welding analog technique
As sending data side's simulation process, panel beating simulation process is as receiving data side's simulation process；And by panel beating simulation process
Stress calculating results data by bidirectional interface transmission to welding analog technique time, panel beating simulation process as send data side
Simulation process, welding analog technique is as receiving data side's simulation process.
Further, described solidification simulation technique, forging simulation process, welding analog technique, heat treatment simulation process and
It is consistent that panel beating simulation process calculates the Re involved by process-power accounting equation, will send data side when building interface
The ess-strain result of simulation process and gridding information read out a newly-generated file, then according to receive the simulation of data side
The pre-treatment form of technique carries out reprocessing can realize corresponding interface.
Further, described solidification simulation technique, forging simulation process, welding analog technique, heat treatment simulation process and
Panel beating simulation process all uses Fourier's equation of heat conduction and newton convection heat transfer' heat-transfer by convection equation when carrying out temperature computation；
According to heat transfer principle, the formula of Fourier's equation of heat conduction is:
Wherein, T is temperature, and t is the time,、AndFor the thermal conductivity along tri-directions of xyz, ρ, c are respectively material
Density and specific heat capacity, L is specific latent heat,For solid phase mass fraction；
The formula of newton convection heat transfer' heat-transfer by convection equation is:
Wherein,For heat flow density, α is convective heat-transfer coefficient,For medium temperature,For workpiece temperature.The present invention applies
Time, relate in operation substantially conducts heat and stream calculation is all based on Fourier's equation of heat conduction and newton convection heat transfer' heat-transfer by convection equation
Calculate.
Further, described solidification simulation technique, forging simulation process, welding analog technique, heat treatment simulation process and
Panel beating simulation process Stress calculation, based on thermo-elasto-plasticity constitutive relation, i.e. meets equation below:
In formula,For total stress increment tensor,For overall strain increment tensor,For elasticity tensor,For flexibility
Tensor,For thermal coefficient of expansion,For stress tensor,For temperature increment,For plastic strain increment tensor,For
Kronecker function sign function.
Further, described solidification simulation technique, forging simulation process, welding analog technique, heat treatment simulation process and
Also relate to fluid analysis during panel beating simulation process Stress calculation, mass-conservation equation, conservation of momentum side should be met
Journey and energy conservation equation, wherein, mass-conservation equation is:
In formula, D is divergence, and u, v, w are the fluid velocity component in tri-directions of xyz respectively；
Momentum conservation equation is:
In formula, g is acceleration of gravity, and ρ is density, and p is pressure, and u, v, w are that the fluid flow velocity in tri-directions of xyz divides respectively
Amount, μ is fluid kinematic viscosity；
Energy conservation equation is:
In formula, c is fluid ratio thermal capacitance, and ρ is density, and T is temperature, Q fluid endogenous pyrogen, and λ is fluid thermal conductance.
Further, described step 2～step 4 are further comprising the steps of: described reception data side simulation process according to
The stress calculating results sending data side's simulation process combines the setting of self margin status of process, as Pretreatment, then enters
Row receives the simulation of data side's simulation process and calculates.
In sum, the method have the advantages that the present invention to pass through between simulation process and develop one-way interfaces
Or bidirectional interface, the numerical simulation result data of various simulation process can be transmitted and read by these interfaces, from
And make the hot worked five kinds of technique numerical simulations isolated be coupled by transmission and the reading of result data, can
To realize materials processing thermal technology process and solidify, to forge, to weld, the whole process coupled simulation of heat treatment, sheet metal process calculate,
Take into full account the data transmission of ess-strain between different process and influenced each other, analog reslt and actual condition can have been promoted
The goodness of fit, and then can improve simulation precision and materials processing thermal process simulation calculate credibility and engineering practical value.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing being further appreciated by the embodiment of the present invention, constitutes of the application
Point, it is not intended that the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is the graph of a relation between different simulation process；
Fig. 2 is that between different process, data coupling (unidirectional) move towards FB(flow block)；
Fig. 3 is the process chart of panel beating extremely welding in one specific embodiment of the present invention.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment and accompanying drawing, to this
Invention is described in further detail, and the exemplary embodiment of the present invention and explanation thereof are only used for explaining the present invention, do not make
For limitation of the invention.
Embodiment:
As it is shown in figure 1, materials hot working whole process heating power stream microstructure multiple physical field numerical computation method, including carrying out successively
Following steps: step one, build solidification simulation technique to forging simulation process and the one-way interfaces of heat treatment simulation process, structure
Build the bidirectional interface of forging simulation process, welding analog technique and panel beating simulation process three and heat treatment simulation process, and structure
Build the bidirectional interface of welding analog technique and panel beating simulation process；Step 2, by the stress calculating results number of solidification simulation technique
According to by one-way interfaces transmission extremely forging simulation process and heat treatment simulation process；Step 3, general's forging simulation process, welding mould
The stress calculating results data intending technique and panel beating simulation process three are transmitted to heat treatment simulation process by bidirectional interface, or
The stress calculating results data of heat treatment simulation process are transmitted to forging simulation process, welding analog technique by bidirectional interface
And panel beating simulation process；Step 4, by the stress calculating results data of welding analog technique by bidirectional interface transmit to panel beating
Simulation process, or the stress calculating results data of panel beating simulation process are transmitted to welding analog technique by bidirectional interface.Its
In, step 2～step 4 are further comprising the steps of: receive data side's simulation process according to sending answering of data side's simulation process
Power result of calculation combines self margin status of process and arranges, and as Pretreatment, then is received data side's simulation process
Simulation calculates.
The solidification simulation technique of the present embodiment, forging simulation process, welding analog technique, heat treatment simulation process and panel beating
It is consistent that simulation process calculates the Re involved by process-power accounting equation, will send the simulation of data side when building interface
The ess-strain result of technique and gridding information read out a newly-generated file, then according to receive data side's simulation process
Pre-treatment form carry out reprocessing and can realize corresponding interface.
The step 2 of the present embodiment～step 4 will send the stress calculating results data transmission of data side's simulation process
To specifically including following steps when receiving data side's simulation process: by sending the ess-strain result of data side's simulation process, press
According to the pre-treatment form of reception data side simulation process, utilize inquiry contrast and optimal algorithm to carry out node selection and read with result
Take, and make grid node corresponding with result data, carry out the seamless coupling link of two kinds of techniques, it is achieved send data side's simulation work
The stress calculating results data transmission of skill is to receiving in data side's simulation process.In the present embodiment, each simulation process is based on difference
Simulation softward realizes, and gets through mutual result data transmission by arranging interface, therefore relates to upper one procedure
Result carries out transcoding according to the computation scheme of next process.
The solidification simulation technique of the present embodiment, forging simulation process, welding analog technique, heat treatment simulation process and panel beating
Simulation process all uses Fourier's equation of heat conduction and newton convection heat transfer' heat-transfer by convection equation when carrying out temperature computation；
According to heat transfer principle, the formula of Fourier's equation of heat conduction is:
Wherein, T is temperature, and t is the time,、AndFor the thermal conductivity along tri-directions of xyz, ρ, c are respectively material
Density and specific heat capacity, L is specific latent heat,For solid phase mass fraction；
The formula of newton convection heat transfer' heat-transfer by convection equation is:
Wherein,For heat flow density, α is convective heat-transfer coefficient,For medium temperature,For workpiece temperature.
The solidification simulation technique of the present embodiment, forging simulation process, welding analog technique, heat treatment simulation process and panel beating
Simulation process Stress calculation, based on thermo-elasto-plasticity constitutive relation, i.e. meets equation below:
In formula,For total stress increment tensor,For overall strain increment tensor,For elasticity tensor,For soft
Property tensor,For thermal coefficient of expansion,For stress tensor,For temperature increment,For plastic strain increment tensor,
For Kronecker function sign function.
The solidification simulation technique of the present embodiment, forging simulation process, welding analog technique, heat treatment simulation process and panel beating
Also relate to fluid analysis during simulation process Stress calculation, should meet mass-conservation equation, momentum conservation equation and
Energy conservation equation, wherein, mass-conservation equation is:
In formula, D is divergence, and u, v, w are the fluid velocity component in tri-directions of xyz respectively；
Momentum conservation equation is:
In formula, g is acceleration of gravity, and ρ is density, and p is pressure, and u, v, w are that the fluid flow velocity in tri-directions of xyz divides respectively
Amount, μ is fluid kinematic viscosity；
Energy conservation equation is:
In formula, c is fluid ratio thermal capacitance, and ρ is density, and T is temperature, Q fluid endogenous pyrogen, and λ is fluid thermal conductance.
Fig. 2 shows between different process that data coupling (unidirectional) move towards FB(flow block), the present embodiment in the specific implementation, on
One process simulation and calculation structure output technology Calculation result grid together with upper prepares to change through form translation interface, upper one
The converted result of technique and grid, as the Pretreatment of this technique, then carry out this margin status of process setting,
Carry out this process simulation and calculation again.
During as it is shown on figure 3, the present embodiment carries out panel beating simulation process/welding analog technique coupling, operation is followed successively by CAD mould
Type importing, stress and strain model, the calculating of sheet metal process spring-back research, panel beating springback compensation calculate and welding analog calculating, wherein, and panel beating
And be to realize panel beating grid and the transcoding of corresponding result and output by data-interface between welding calculating, welding is sharp in calculating
The grid transmitted with interface and result add welding parameter and carry out computational analysis.Three-dimensional is utilized during the present embodiment application
Modeling software sets up the geometric model after sheet-metal formed, is then read out by cad model introducting interface.In panel beating software
The resilience of computation model and correlative compensation amount, then utilize the present embodiment data-interface, panel beating result is read out and changes
Become welding analog form, the most just can read in welding analog software and show sheet metal process analog result, at panel beating mould
Add the necessary boundary conditions such as speed of welding on the basis of intending result again, carry out welding procedure simulation and calculate.The present embodiment is at metal plate
On the premise of having ess-strain after gold molding, then carrying out welding analog analysis, its deformation is basis based on sheet-metal formed deformation
On, namely operation result is to have genetic, and this is also the marked feature coupling a upper operation result, and its flow process the most more accords with
Close actual industrial production.
Above-described detailed description of the invention, has been carried out the purpose of the present invention, technical scheme and beneficial effect further
Describe in detail, be it should be understood that the detailed description of the invention that the foregoing is only the present invention, be not intended to limit the present invention
Protection domain, all within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. done, all should comprise
Within protection scope of the present invention.
Claims (7)
1. materials hot working whole process heating power stream microstructure multiple physical field numerical computation method, it is characterised in that include following
Step:
Step one, structure solidification simulation technique, to forging simulation process and the one-way interfaces of heat treatment simulation process, build forging
Simulation process, welding analog technique and panel beating simulation process three and the bidirectional interface of heat treatment simulation process, and build welding
Simulation process and the bidirectional interface of panel beating simulation process；
Step 2, one-way interfaces of the stress calculating results data of solidification simulation technique being passed through are transmitted and are extremely forged simulation process and heat
Process simulation process；
Step 3, forging simulation process, the stress calculating results data of welding analog technique and panel beating simulation process three are led to
Cross bidirectional interface to transmit to heat treatment simulation process, or the stress calculating results data of heat treatment simulation process are connect by two-way
Oral instructions are transported to forge mould and are intended technique, welding analog technique and panel beating simulation process；
Step 4, by the stress calculating results data of welding analog technique by bidirectional interface transmit to panel beating simulation process, or
The stress calculating results data of panel beating simulation process are transmitted to welding analog technique by bidirectional interface.
Materials hot working whole process heating power stream microstructure multiple physical field numerical computation method the most according to claim 1,
It is characterized in that, the stress calculating results data sending data side's simulation process are transmitted to connecing by described step 2～step 4
Following steps are specifically included: by sending the ess-strain result of data side's simulation process, according to connecing when receiving data side's simulation process
Receive the pre-treatment form of data side's simulation process, utilize inquiry contrast and optimal algorithm to carry out node and select to read with result, and
Make grid node corresponding with result data, carry out the seamless coupling link of two kinds of techniques, it is achieved send data side's simulation process
The transmission of stress calculating results data is to receiving in data side's simulation process.
Materials hot working whole process heating power stream microstructure multiple physical field numerical computation method the most according to claim 2,
It is characterized in that, described solidification simulation technique, forging simulation process, welding analog technique, heat treatment simulation process and panel beating mould
Intend technique and calculate the Re involved by process-power accounting equation unanimously, simulation work in data side's will be sent when building interface
The ess-strain result of skill and gridding information read out a newly-generated file, then according to receive data side's simulation process
Pre-treatment form carries out reprocessing can realize corresponding interface.
Materials hot working whole process heating power stream microstructure multiple physical field numerical computation method the most according to claim 3,
It is characterized in that, described solidification simulation technique, forging simulation process, welding analog technique, heat treatment simulation process and panel beating mould
Intend technique and all use Fourier's equation of heat conduction and newton convection heat transfer' heat-transfer by convection equation when carrying out temperature computation；
According to heat transfer principle, the formula of Fourier's equation of heat conduction is:
Wherein, T is temperature, and t is the time,、AndFor the thermal conductivity along tri-directions of xyz, ρ, c are respectively material
Density and specific heat capacity, L is specific latent heat,For solid phase mass fraction；
The formula of newton convection heat transfer' heat-transfer by convection equation is:
Wherein,For heat flow density, α is convective heat-transfer coefficient,For medium temperature,For workpiece temperature.
Materials hot working whole process heating power stream microstructure multiple physical field numerical computation method the most according to claim 1,
It is characterized in that, described solidification simulation technique, forging simulation process, welding analog technique, heat treatment simulation process and panel beating mould
Intend technique Stress calculation based on thermo-elasto-plasticity constitutive relation, i.e. meet equation below:
In formula,For total stress increment tensor,For overall strain increment tensor,For elasticity tensor,For flexibility
Tensor,For thermal coefficient of expansion,For stress tensor,For temperature increment,For plastic strain increment tensor,
For Kronecker function sign function.
Materials hot working whole process heating power stream microstructure multiple physical field numerical computation method the most according to claim 1,
It is characterized in that, described solidification simulation technique, forging simulation process, welding analog technique, heat treatment simulation process and panel beating mould
Also relate to fluid analysis during intending technique Stress calculation, mass-conservation equation, momentum conservation equation and energy should be met
Amount conservation equation, wherein, mass-conservation equation is:
In formula, D is divergence, and u, v, w are the fluid velocity component in tri-directions of xyz respectively；
Momentum conservation equation is:
In formula, g is acceleration of gravity, and ρ is density, and p is pressure, and u, v, w are that the fluid flow velocity in tri-directions of xyz divides respectively
Amount, μ is fluid kinematic viscosity；
Energy conservation equation is:
In formula, c is fluid ratio thermal capacitance, and ρ is density, and T is temperature, Q fluid endogenous pyrogen, and λ is fluid thermal conductance.
7. according to the materials hot working whole process heating power stream microstructure multiple physical field described in any one in claim 1～6
Numerical computation method, it is characterised in that described step 2～step 4 are further comprising the steps of: described reception data side simulation work
Skill combines self margin status of process according to the stress calculating results sending data side's simulation process and arranges, as pre-treatment bar
Part, then it is received the simulation calculating of data side's simulation process.
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| CN111783324A (en) * | 2020-04-28 | 2020-10-16 | 北京科技大学 | Full-process simulation method for realizing alloy preparation |
| CN113139314A (en) * | 2021-04-29 | 2021-07-20 | 四川大学 | Heat source numerical simulation method for laser additive manufacturing process |
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| CN102831274A (en) * | 2012-08-30 | 2012-12-19 | 中南林业科技大学 | Correction method of distribution of quenching stress field of aluminum alloy thick plate |
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