CN104573141B - Solder design analogy method based on finite element analysis - Google Patents
Solder design analogy method based on finite element analysis Download PDFInfo
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- CN104573141B CN104573141B CN201310469136.2A CN201310469136A CN104573141B CN 104573141 B CN104573141 B CN 104573141B CN 201310469136 A CN201310469136 A CN 201310469136A CN 104573141 B CN104573141 B CN 104573141B
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- 229910000679 solder Inorganic materials 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000004458 analytical method Methods 0.000 title claims abstract description 38
- 238000004088 simulation Methods 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 210000001848 seam cell Anatomy 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 210000004027 cell Anatomy 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
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- Electric Connection Of Electric Components To Printed Circuits (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The present invention proposes the solder design analogy method based on finite element analysis, the method includes：It determines the size of actual weld seam and determines the size and thickness for the heat-affected zone of the weld seam and the grid in nugget region according to the size of actual weld seam；Finite element modeling is carried out to the weld seam based on the size and thickness of the grid in the identified heat-affected zone and nugget region for the weld seam.Solder design analogy method disclosed in this invention based on finite element analysis has high simulation accuracy.
Description
Technical field
The present invention relates to solder design analogy methods, are simulated more particularly, to the solder design based on finite element analysis
Method.
Background technology
Currently, growing and universal with vehicle, by finite element method to used in vehicle manufacture
Seam weld is modeled（Such as CAE（Computer-aided engineering）Model）With accurate simulation solder design and analysis and determination pair in turn
Intensity, fatigue resistance, crash-worthiness and the NVH for the structure answered（Noise, vibration and sound vibration roughness）Etc. characteristics become increasingly
It is important.
The basic functional principle of the existing two kinds solder design analogy methods based on finite element analysis is as follows：（1）
In a kind of mode, solder design is defined as the rigid connection between two plates, and simulated using rigid element；（2）
In the second way, using flexible connection, but weld seam is defined as the thickness of two connecting plates, and its material properties is equivalent
In the material properties of two connecting plates.
However, there are the following problems for existing technical solution：（1）For the first scheme, since solder design is simple
Ground is defined as being rigidly connected, therefore the unit of junction can be caused to be mutated, to cause the analog result in the region untrue（I.e. with
It is practical larger compared to difference）, thus cause the effect of simulation relatively rough；（2）For second scheme, which obviate junctions
Unit mutation, but due to not accounting for the influence of heat affected area and nugget area, therefore solder design model is still fairly simple,
Thus cause the effect of simulation still relatively rough.
Accordingly, there exist following demands：The solder design mould based on finite element analysis with high simulation accuracy is provided
Quasi- method.
Invention content
In order to solve the problems existing in the prior art scheme, the present invention is proposed with high simulation accuracy
Solder design analogy method based on finite element analysis.
The purpose of the present invention is what is be achieved through the following technical solutions：
A kind of solder design analogy method based on finite element analysis, the method includes the following steps：
（A1）It determines the size of actual weld seam and the hot shadow for the weld seam is determined according to the size of actual weld seam
Ring the size and thickness of the grid in region and nugget region；
（A2）Based on the grid in the identified heat-affected zone and nugget region for the weld seam size and
Thickness carries out finite element modeling to the weld seam.
In scheme disclosed above, it is preferable that the step（A2）Further comprise：
（B1）It will be adjacent to the first row of the weld seam according to the grid in the identified heat-affected zone for the weld seam
Cell formation is at heat affected area domain model；
（B2）It will be at position while welding and overlap according to the grid in the identified nugget region for the weld seam
Cell formation at nugget regional model.
In scheme disclosed above, it is preferable that the step（B1）Further comprise：It is used for institute according to identified
State the size cutting heat-affected zone geometrical model of the grid in the heat-affected zone of weld seam.
In scheme disclosed above, it is preferable that the step（B2）Further comprise：It is used for institute according to identified
State the size cutting nugget region geometry model of the grid in the nugget region of weld seam.
In scheme disclosed above, it is preferable that the step（A2）Further comprise：Extract the inner edge of welded seam area
Face is with grid division in edge geometry；It adjusts and optimizes divided inward flange grid, so that the heat-affected zone and the weldering
The grid node of core region can correspond；It is that the heat-affected zone and the nugget region assign material according to design requirement
Expect attribute, and the thickness of the grid in the identified heat-affected zone and nugget region for the weld seam is assigned respectively
Give the heat-affected zone and the nugget region.
In scheme disclosed above, it is preferable that the step（A2）Further comprise：By the heat-affected zone and
Corresponding grid node in the nugget region is connected one by one with two-dimentional shell unit, is connected with the weld seam simulated between two components
It connects.
In scheme disclosed above, it is preferable that the method further includes：It will be built by step (A1)-(A2)
The vertical solder design model based on finite element is applied in automobile overall structure finite element analysis model.
In scheme disclosed above, it is preferable that determine the heat-affected zone for the weld seam based on such as under type
And the size of the grid in nugget region：（1）The unit size in heat-affected zone is：aL = L2、 bL = L2、dL=L2,
In, aLIt is the plank simulated heat-affected zone grid a length dimensions that thickness is t1；bL, dLIt is that the plank that thickness is t2 simulates hot shadow
Area grid b, d length dimensions are rung, L2 is the width dimensions that actual welds connect on the plank that thickness is t2；2) nugget region
Unit size is：cL=L2/2, wherein cLIt is the length dimension for the simulation nugget area grid that thickness is t2 planks, L2 is practical
The width dimensions that weld seam connects on the plank that thickness is t2.
In scheme disclosed above, it is preferable that determine the heat-affected zone for the weld seam based on such as under type
And the thickness of the grid in nugget region：(1）The element thickness in heat-affected zone is：aT = t1+(L1/2)、bT = t2+(L2/
2)、dT=t2+ (L1/2), wherein aTIt is the plank simulated heat-affected zone grid a thickness that thickness is t1; bT, dTIt is thick
Degree is plank simulated heat-affected zone grid b, the d thickness of t2, and t1, t2 are plate thicknesss；L1 is that actual welds are in thickness
The width dimensions connected on the plank of t1；L2 is the width dimensions that actual welds connect on the plank that thickness is t2；（2）Nugget
The element thickness in region is：cT=t2+L2, wherein cTIt is the thickness for the simulation nugget area grid c that thickness is t2 planks；T2 is
Plate thickness；L2 is the width that actual welds connect on the plank that thickness is t2.
Solder design analogy method disclosed in this invention based on finite element analysis has the following advantages：Due to avoiding
Influence of the mesh distortion to emulation, while both heat-affected zone and the nugget region for considering seam weld, therefore can significantly carry
The simulation accuracy of high finite element model.
Description of the drawings
In conjunction with attached drawing, technical characteristic of the invention and advantage will be more fully understood by those skilled in the art, wherein：
Fig. 1 is the flow chart of the solder design analogy method according to an embodiment of the invention based on finite element analysis；
Fig. 2 is the first realization example of the solder design analogy method according to an embodiment of the invention based on finite element analysis
The schematic diagram of son；
Fig. 3 is the second realization example of the solder design analogy method according to an embodiment of the invention based on finite element analysis
The schematic diagram of son.
Specific implementation mode
Fig. 1 is the flow chart of the solder design analogy method according to an embodiment of the invention based on finite element analysis.Such as
Shown in Fig. 1, the solder design analogy method disclosed in this invention based on finite element analysis includes the following steps：（A1）It determines real
The size of the weld seam on border simultaneously determines heat-affected zone and the nugget region for being used for the weld seam according to the size of actual weld seam
Grid size and thickness；（A2）Based on the net in the identified heat-affected zone for the weld seam and nugget region
The size and thickness of lattice carry out finite element modeling to the weld seam.
Preferably, disclosed in this invention in the solder design analogy method based on finite element analysis, the step
（A2）Further comprise：（B1）It will be adjacent to the weld seam according to the grid in the identified heat-affected zone for the weld seam
First row cell formation is at heat affected area domain model；（B2）It will according to the grid in the identified nugget region for the weld seam
Cell formation at position while welding and overlap is at nugget regional model.
Preferably, disclosed in this invention in the solder design analogy method based on finite element analysis, the step
（B1）Further comprise：Heat-affected zone is cut according to the size of the grid in the identified heat-affected zone for the weld seam
Geometrical model.
Preferably, disclosed in this invention in the solder design analogy method based on finite element analysis, the step
（B2）Further comprise：Nugget region geometry is cut according to the size of the grid in the identified nugget region for the weld seam
Model.
Preferably, disclosed in this invention in the solder design analogy method based on finite element analysis, the step
（A2）Further comprise：Extract welded seam area（Including heat affecting geometric areas and nugget geometric areas）Inward flange geometry in
Face is with grid division；Adjustment and the divided inward flange grid of optimization, so that the heat-affected zone and the nugget region
Grid node can correspond；It is that the heat-affected zone and the nugget region assign material properties according to design requirement,
And described in the thickness of the grid in the identified heat-affected zone and nugget region for the weld seam is assigned respectively
Heat-affected zone and the nugget region.
Preferably, disclosed in this invention in the solder design analogy method based on finite element analysis, the step
（A2）Further comprise：By the two-dimentional shell unit one of the corresponding grid node in the heat-affected zone and the nugget region
One connection, to simulate the solder design between two components.
Preferably, the solder design analogy method disclosed in this invention based on finite element analysis further comprises：It will lead to
The solder design model based on finite element for crossing step (A1)-(A2) foundation is applied to automobile overall structure finite element analysis model
In（Such as by way of node fusion）.
Preferably, disclosed in this invention in the solder design analogy method based on finite element analysis, based on such as lower section
Formula determines the size for the heat-affected zone of the weld seam and the grid in nugget region：（1）The unit ruler in heat-affected zone
It is very little to be：aL = L2、 bL = L2、dL=L2, wherein aLIt is the plank simulated heat-affected zone grid a length dimensions that thickness is t1；
bL, dLIt is plank simulated heat-affected zone grid b, the d length dimension that thickness is t2, L2 is actual welds in the plank that thickness is t2
The width dimensions of upper connection；2) unit size in nugget region is：cL=L2/2, wherein cLIt is the simulation that thickness is t2 planks
The length dimension of nugget area grid, L2 are the width dimensions that actual welds connect on the plank that thickness is t2.
Preferably, disclosed in this invention in the solder design analogy method based on finite element analysis, based on such as lower section
Formula determines the thickness for the heat-affected zone of the weld seam and the grid in nugget region：（1）The units thick in heat-affected zone
Degree is：aT = t1+(L1/2)、bT = t2+(L2/2)、dT=t2+ (L1/2), wherein aTIt is that the plank that thickness is t1 is simulated
Heat affected area grid a thickness; bT, dTIt is plank simulated heat-affected zone grid b, the d thickness that thickness is t2, t1, t2
It is plate thickness；L1 is the width dimensions that actual welds connect on the plank that thickness is t1；L2 is that actual welds are in thickness
The width dimensions connected on the plank of t2；（2）The element thickness in nugget region is：cT=t2+L2, wherein cTBe thickness be t2
The thickness of the simulation nugget area grid c of plank；T2 is plate thickness；L2 is that actual welds connect on the plank that thickness is t2
Width.
Fig. 2 is the first realization example of the solder design analogy method according to an embodiment of the invention based on finite element analysis
The schematic diagram of son, wherein in described first realizes example, the type of seam weld is Lap types.Fig. 3 is implementation according to the present invention
The second of the solder design analogy method based on finite element analysis of example realizes the schematic diagram of example, wherein real described second
In existing example, the type of seam weld is T-type.
Therefore the solder design analogy method disclosed in this invention based on finite element analysis has following advantages：
Due to avoiding influence of the mesh distortion to emulation, while both heat-affected zone and the nugget region for considering seam weld, therefore energy
The simulation accuracy of finite element model is enough significantly increased,
Although the present invention is described by above-mentioned preferred embodiment, way of realization is not limited to
Above-mentioned embodiment.It should be realized that：In the case where not departing from spirit and scope of the present invention, those skilled in the art can be with
Different change and modification are made to the present invention.
Claims (8)
1. a kind of solder design analogy method based on finite element analysis, the method includes the following steps：
（A1）It determines the size of actual weld seam and the heat affected area for the weld seam is determined according to the size of actual weld seam
The size and thickness of the grid in domain and nugget region；With
（A2）Based on the size and thickness of the grid in the identified heat-affected zone and nugget region for the weld seam
Finite element modeling is carried out to the weld seam；
The size for the heat-affected zone of the weld seam and the grid in nugget region is determined based on such as under type：（1）Hot shadow
Ring region unit size be：aL = L2、 bL = L2、dL=L2 wherein, aLIt is the plank simulated heat-affected zone that thickness is t1
Grid a length dimensions；bL, dLIt is plank simulated heat-affected zone grid b, the d length dimension that thickness is t2, L2 is that actual welds exist
The width dimensions connected on the plank that thickness is t2；（2) unit size in nugget region is：cL=L2/2 wherein, cLIt is thick
Degree is the length dimension of the simulation nugget area grid of t2 planks, and L2 is the width that actual welds connect on the plank that thickness is t2
Size.
2. the solder design analogy method according to claim 1 based on finite element analysis, which is characterized in that the step
（A2）Further comprise：
（B1）It will be adjacent to the first row unit of the weld seam according to the grid in the identified heat-affected zone for the weld seam
It is built into heat affected area domain model；
（B2）According to the grid in the identified nugget region for the weld seam by the list at position while welding and overlap
Member is built into nugget regional model.
3. the solder design analogy method according to claim 2 based on finite element analysis, which is characterized in that the step
（B1）Further comprise：Heat-affected zone is cut according to the size of the grid in the identified heat-affected zone for the weld seam
Geometrical model.
4. the solder design analogy method according to claim 2 based on finite element analysis, which is characterized in that the step
（B2）Further comprise：Nugget region geometry is cut according to the size of the grid in the identified nugget region for the weld seam
Model.
5. the solder design analogy method according to claim 2 based on finite element analysis, which is characterized in that the step
（A2）Further comprise：Face is with grid division in the inward flange geometry of extraction welded seam area；Adjust and optimize divided inner edge
Hoddy lattice, so that the grid node in the heat-affected zone and the nugget region can correspond；It is according to design requirement
The heat-affected zone and the nugget region assign material properties, and by the identified heat-affected zone for the weld seam
And the thickness of the grid in nugget region assigns the heat-affected zone and the nugget region respectively.
6. the solder design analogy method according to claim 5 based on finite element analysis, which is characterized in that the step
（A2）Further comprise：By the two-dimentional shell unit one of the corresponding grid node in the heat-affected zone and the nugget region
One connection, to simulate the solder design between two components.
7. the solder design analogy method according to claim 1 based on finite element analysis, which is characterized in that the method
Further comprise：The solder design model based on finite element established by step (A1)-(A2) is integrally tied applied to automobile
In structure finite element analysis model.
8. the solder design analogy method according to claim 1 based on finite element analysis, which is characterized in that based on such as
Under type determines the thickness for the heat-affected zone of the weld seam and the grid in nugget region：1）The unit in heat-affected zone
Thickness is：aT = t1+(L1/2)、bT = t2+(L2/2)、dT=t2+ (L1/2), wherein aTIt is the plank mould that thickness is t1
Quasi- heat affected area grid a thickness;bT, dTBe thickness be t2 plank simulated heat-affected zone grid b, d thickness, t1,
T2 is plate thickness；L1 is the width dimensions that actual welds connect on the plank that thickness is t1；L2 is actual welds in thickness
For the width dimensions connected on the plank of t2；（2）The element thickness in nugget region is：cT=t2+L2, wherein cTIt is that thickness is
The thickness of the simulation nugget area grid c of t2 planks；T2 is plate thickness；L2 is that actual welds connect on the plank that thickness is t2
Width.
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| CN105912805B (en) * | 2016-04-28 | 2019-10-18 | 北京汽车研究总院有限公司 | A kind of modeling method and device of metal plate weld seam finite element model |
| CN106294958B (en) * | 2016-08-03 | 2019-12-03 | 奇瑞汽车股份有限公司 | The method and apparatus for creating weld seam |
| CN107378199B (en) * | 2017-09-01 | 2019-04-23 | 苏州热工研究院有限公司 | A method of adjustment welded thin-wall box component geometric dimension distribution |
| CN109522610A (en) * | 2018-10-25 | 2019-03-26 | 南京航空航天大学 | A kind of weld metal zone mixing crystalline region finite element modeling method |
| CN111914439B (en) * | 2019-06-04 | 2024-06-18 | 中车大同电力机车有限公司 | Modeling method and device of finite element model, storage medium and electronic equipment |
| CN111967177B (en) * | 2020-09-01 | 2024-06-11 | 中车大同电力机车有限公司 | Finite element model modeling method for welding seam of welded steel structure |
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| KR100919468B1 (en) * | 2006-10-26 | 2009-09-28 | 삼성중공업 주식회사 | Automatic generation system for welding deformation analysis of ship construction |
| CN100561490C (en) * | 2008-03-13 | 2009-11-18 | 上海交通大学 | Assembly soldering plate welded seam finite element modeling method based on vehicle collision simulation |
| CN101561840B (en) * | 2009-06-02 | 2011-12-21 | 肖锋 | Numerical value simulation method for spot welding connection and failure thereof |
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