CN109918785A - A kind of large-scale complex thin-wall titanium alloy member hot forming corrugation prediction and control method - Google Patents
A kind of large-scale complex thin-wall titanium alloy member hot forming corrugation prediction and control method Download PDFInfo
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Abstract
The invention discloses a kind of large-scale complex thin-wall titanium alloy member hot forming corrugation prediction and control method, belong to metal plate substantially without machining field, the present invention includes Step 1: establishing titanium alloy thin wall component hot forming corrugation prediction theory；Step 2: corrugated region may occur for prediction sheet forming process；Step 3: establishing the hot formed limit element artificial module of sheet metal part；Step 4: determining corrugated regions and corrugation reason；Step 5: optimizing original blank shape and mould structure, then carry out simulation analysis；Step 6: repeat Step 3: four, five, reaches after product technology requires after analog simulation result, carry out practical sheet metal part hot forming and produce；Step 7: being advanced optimized for actual production result, produce again；It can be wrinkled to large-scale complex thin-wall hot forming titanium alloy member using the method for the present invention and be predicted and controlled, reduce rejection rate, improve production efficiency, reduce production cost.
Description
Technical field
The invention belongs to metal plate or pipes, stick or profile substantially without machining or process field, be a kind of metal plate
Material hot sizing technique, specifically a kind of large-scale complex thin-wall titanium alloy member hot forming corrugation prediction and control method.
Background technique
Titanium alloy has specific strength height, high temperature resistant, and corrosion-resistant equal excellent properties are therefore widely used in aerospace
Field.But since plasticity is poor under normal temperature state for titanium alloy, resistance of deformation is big, plate cold forming is difficult；Therefore hot forming
It is that can especially manufacture large-scale high-precision, complicated metal plate for manufacturing the most common process of titanium-alloy sheet metal
Part.
However, when material deforms under punch-pin effect, some materials are sent out in sheet metal part heat pressure forming process
Raw radial direction feed supplement, partial region is by the compression by radial direction, at this time if mold cannot effectively inhibit the pressure of plate
Caused by compression when displacement, plate will wrinkle.
Although many researchers have carried out corrugation to analyze and establish corrugation unstability mechanical model, corrugated
Prediction is still a great problem of thin-wall member forming, especially in titanium alloy plate heat forming processes, material with control
Intensity is significantly affected by factors such as the strain rate of material and temperature, so that the wrinkling of alloy complex thin-wall part is more difficult
Prediction and control.
Summary of the invention
The invention discloses a kind of large-scale complex thin-wall titanium alloy member hot forming corrugation prediction and control method, this hairs
It is bright to be wrinkled prediction theory by establishing titanium alloy thin wall component hot forming, and simulation model is established based on the theory, it is early period
Actual production instructed and optimized offer foundation, and then wrinkle and carry out to large-scale complex thin-wall hot forming titanium alloy member
Prediction and control, solve problems of the prior art.
The present invention is implemented as follows:
Step 1: establishing titanium alloy thin wall component hot forming corrugation prediction theory；
Step 2: obtaining mechanical parameters, it is corrugated critical in the wrong to obtain the generation of blank plate in conjunction with corrugation prediction theory
Transverse stress function predicts that corrugated region may occur for sheet forming process according to practical sheet forming process；
Step 3: being based on above-mentioned material parameter model and plate mold digital-to-analogue, the hot formed finite element of sheet metal part is established
Simulation model；
Step 4: theoretical prediction region and the corrugated regions of the sheet metal component after simulation forming are compared, corrugation is determined
Region and corrugation reason；
Step 5: the transfer characteristic based on material, optimizes original blank shape and mould structure, then carries out simulation and imitate
True analysis；
Step 6: repeat Step 3: four, five, reaches after product technology requires after analog simulation result, carry out practical metal plate
Metal parts hot forming production；
Step 7: advanced optimizing original blank shape and mould structure for actual production result, produce again.
Further, the step one specifically:
1.1, plate is set in one direction by the compression stress in plane, in the other directions by plane
Pressure-pad-force p under interior tensile stress and the effect of general constraints power, for buckling plate and intact plate, load is to pass through list
Tune and proportional increased boundary displacement uxIt carries out, draw direction stress σzWith the compression stress ot on the direction xxIt is proportional, i.e.,
σz/σx=α, wherein stress ratio α is assumed to be constant；It is assumed that in the case where ignoring shear stress, i.e. σ3/σ1=σz/σx=α, therefore
Following stress state is described with principal stress and strain；Assuming that under tension, buckling plate and plate are in third side
There is identical strain increment Δ ε upwards3；
1.2, it is in-plane anisotropy by material modeling, anisotropy is indicated with parameter R, which is simple extension examination
Test the ratio between the plastic strain of the width plastic strain and thickness direction on sheet plane；Equivalent stress and equivalent strain are as follows
It is shown:
The strain hardening behavior of material is described with Alfred Swift formula:
Wherein, K is strength of materials coefficient, and n is strain hardening exponent, ε0It is prestrain；
For a plate, in given edge dislocation uxUnder/L, the corresponding components of strainIt can indicate are as follows:
Compared with no horizontal tension the case where, i.e. α=0, we are available strain increment Δ ε3:
Formula is brought into obtain the equivalent strain of plate are as follows:
Wherein
Therefore, under edge compression and horizontal tension effect, the strain energy E of per unit width on plate0It can indicate
Are as follows:
1.3, correspondingly, the strain energy E of buckling plate unit widthwIt can obtain in the following manner:
In given edge dislocation uxUnder/L, the deformed shape of buckling plate be can be assumed as a sine wave:
Y=δ (1+cos (mx))
Wherein m is the frequency under associative mode；
Based on material Incoercibility and it is without thickness change it is assumed that available per unit width volume are as follows:
Simplify processing, the projection amplitude that our available condition shapes are by Taylor expansion are as follows:
1.4, using the sequential cells finite element analysis for simplifying integral, in the case where no horizontal tension, displacement components uzRecognize
To be uniform, therefore corresponding strain stresszIt is constant is zero, under tensioned effect, it is assumed that buckling plate and on plate
Strain increment Δ ε having the same3, for twisted plate large deformation, external strain εz, radial strain εrWith circumferential strain εθAre as follows:
εz=△ε3
εθ=ln (r/ru)
εr=-Δ ε3-ln(r/ru)
Have been generally acknowledged that Δ ε3< < εθ, the equivalent strain of buckling plate can simplify are as follows:
Wherein,
Wherein r is radius of curvature, ruIt is the radius of curvature on non-stretched surface；If riAnd r0It is inside and outside to respectively indicate twisted plate
The radius of surface curvature；Equally, by the indeformable of volume, available ruAre as follows:
Wherein
r0=ri+t
Under the hypothesis of no thickness change, non-stretched plate is overlapped with the middle surface of twisted plate；
1.5, using Deformation Theory, have studied under edge compression and cross directional stretch effect, the twisted plate of per unit width
Strain energy EwIt can indicate are as follows:
It is approximately: by Taylor expansion
By calculating E0, EwAnd δ, available Critical Buckling stress are as follows:
In order to findRespectively with L1、L2Relationship, establish following relationship:
Therefore, we can quantitatively determine in transfer edge dislocationUnder Critical Buckling stress are as follows:
It can be seen that corrugated limit stress depends on the mechanics ginseng of pressure, stress state and material suffered by plate
Number, it may be assumed that
σcr=f (p, α, n, K, R, ε0)。
Further, the step two specifically:
2.1, establish the hardening model of corresponding titanium alloy member；
2.2, establish titanium alloy member FLD strain forming limit failure criteria；
2.3, it establishes titanium alloy blank plate and corrugated Critical Buckling stress function occurs；
2.4, according to practical sheet forming process, predict that corrugated region and improvement may occur for sheet forming process
The method of plate corrugation behavior.
Further, the step four specifically: the failure mode of forming is obtained according to part forming result；By right
Rugosity degree occurs to assess than form after the deformation of plate central symmetry axes and theoretical part digital-to-analogue centre line shape, then
Corrugated regions and corrugation reason are determined according to rugosity form.
Further, the titanium alloy is large scale complexity TA32 titanium alloy covering part.
The beneficial effect of the present invention compared with prior art is: the present invention is risen by establishing the thin plate of non-homogeneous stress
The corrugation prediction theory of wrinkle unstability mechanical model and its hot forming, and simulation model is established based on the theory, it is the reality of early period
Offer foundation is instructed and is optimized in border production, and then predicts the corrugation of large-scale complex thin-wall hot forming titanium alloy member
And control, large-scale titanium alloy sheet metal part heat forming technology is carried out using the method for the present invention, it can be to large-scale complex thin-wall heat
The corrugation of forming titanium alloy component is predicted and is controlled, and rejection rate is reduced, and improves production efficiency, reduces production cost.
Detailed description of the invention
Fig. 1 is large-scale complex thin-wall hot forming titanium alloy member corrugation prediction and control method flow chart；
Fig. 2 is large scale complexity skin part appearance digital-to-analogue；
Fig. 3 is that blank holder acts on lower plate compression schematic diagram；
Fig. 4 is bent plate schematic diagram；
Fig. 5 is large scale complexity covering finite element model；
Fig. 6 is large scale covering Forming Simulation result；
Fig. 7 is that mould structure modifies schematic diagram；
Fig. 8 is Forming Simulation result after modification mould structure.
Specific embodiment
It is clear to keep the purpose of the present invention, technical solution and effect clearer, be exemplified below example to the present invention into
One step is described in detail.It should be understood that specific implementation described herein is not used to limit this hair only to explain the present invention
It is bright.
This method is directed to large scale complexity TA32 titanium alloy covering part hot forming, and accessory appearance digital-to-analogue is as shown in Figure 2；
Large scale complexity titanium alloy covering part corrugation prediction and control method, method is described in detail below in conjunction with attached drawing 1-8
Flow chart is as shown in Figure 1, step are as follows:
Step 1: establishing titanium alloy thin wall component hot forming corrugation prediction theory；
Step 2: obtaining mechanical parameters, it is corrugated critical in the wrong to obtain the generation of blank plate in conjunction with corrugation prediction theory
Transverse stress function predicts that corrugated region may occur for sheet forming process according to practical sheet forming process；
Step 3: being based on mechanical parameters model and plate mold digital-to-analogue, the hot formed finite element of sheet metal part is established
Simulation model；
Step 4: the possibility of theoretical prediction to that the corrugated regions of the sheet metal component behind corrugated region and simulation forming occur
It compares, determines corrugated regions and corrugation reason；
Step 5: the transfer characteristic based on material, optimizes original blank shape and mould structure, then carries out simulation and imitate
True analysis；
Step 6: repeat Step 3: four, five, reaches after product technology requires after analog simulation result, carry out practical metal plate
Metal parts hot forming production；
Step 7: advanced optimizing original blank shape and mould structure for actual production result, produce again,
It is described in detail below.
In heat pressure forming process, it is corrugated to rectangular slab that the corrugated regions problem on each material point, which can simplify,
Analysis, as shown in Figure 3.Plate is in one direction by the compression stress in plane, in the other directions by plane
Tensile stress and general constraints power effect under pressure-pad-force p.For the buckling plate and intact plate in Fig. 3, load is logical
Cross dull and proportional increased boundary displacement uxIt carries out, draw direction stress σzIt is proportional to the compression on the direction x, i.e.,
σz/σx=α, wherein stress ratio α is assumed to be constant.It is assumed that normal stress and principal stress are one in the case where ignoring shear stress
It causes, i.e. σ3/σ1=σz/σx=α, therefore following stress state is described with principal stress and strain.Plate is in horizontal tension
Under the action of have different degrees of elongation in three directions, this is because the result that the boundary constraint on this direction generates.
Assuming that under tension, buckling plate and plate have identical strain increment Δ ε on third direction3。
It is in-plane anisotropy by material modeling, anisotropy is indicated with parameter R.The parameter is in simple extension test
The ratio between the plastic strain of width plastic strain and thickness direction on sheet plane.Used herein is 1948 standard of Hill ' s
The double yielding criterion of anisotropic material.Equivalent stress and equivalent strain are as follows:
The strain hardening behavior of material is described with Alfred Swift formula:
Wherein, K is strength of materials coefficient, and n is strain hardening exponent, ε0It is prestrain.
For a plate, in given edge dislocation uxUnder/L, the corresponding components of strainIt can indicate are as follows:
Compared with no horizontal tension the case where, i.e. α=0, we are available strain increment Δ ε3:
It is by the equivalent strain that formula brings to obtain plate into
Wherein
Therefore, under edge compression and horizontal tension effect, the strain energy E of per unit width on plate0It can be expressed as
Correspondingly, the strain energy E of buckling plate unit widthwIt can obtain in the following manner.In given margin location
Move uxUnder/L, the deformed shape of buckling plate be can be assumed as a sine wave:
Y=δ (1+cos (mx))
Wherein m is the frequency under associative mode.
Based on material Incoercibility and it is without thickness change it is assumed that available per unit width volume are as follows:
Simplify processing by Taylor expansion, the projection amplitude that our available condition shapes are is
Shearing is answered by the observation exported to strain and stress using the sequential cells finite element analysis for simplifying integral
Power and strain are ignored, and are ignored to normal stress in the plane of buckling plate and strain.These simplification make bending for plate
Qu Wenti becomes a pure buckling problem.In the case where no horizontal tension, displacement components uzIt is considered uniform, therefore
Corresponding strain stresszIt is constant is zero.Under tensioned effect, it is assumed that buckling plate and the strain increasing having the same on plate
Measure Δ ε3.For twisted plate large deformation, external strain εz, radial strain εrWith circumferential strain εθFor
εz=Δ ε3
εθ=ln (r/ru)
εr=-Δ ε3-ln(r/ru)
Have been generally acknowledged that Δ ε3< < εθ, the equivalent strain of buckling plate can simplify for
Wherein,
Wherein r is radius of curvature, ruIt is the radius of curvature on non-stretched surface, bent plate is as shown in Figure 4.If riAnd r0Point
Not Biao Shi twisted plate inner and outer surfaces curvature radius.Equally, by the indeformable of volume, available ruFor
Wherein
r0=ri+t
Under the hypothesis of no thickness change, non-stretched plate is overlapped with the middle surface of twisted plate.
Using Deformation Theory, have studied under edge compression and cross directional stretch effect, the twisted plate of per unit width is answered
Becoming can EwIt can be expressed as
It is approximately by Taylor expansion
By calculating E0, EwAnd δ, available Critical Buckling stress are
In order to findRespectively with L1、L2Relationship, establish following relationship:
Therefore, we can quantitatively determine in transfer edge dislocationUnder Critical Buckling stress be
It can be seen that corrugated limit stress depends on the mechanics ginseng of pressure, stress state and material suffered by plate
Number, it may be assumed that
σcr=f (p, α, n, K, R, ε0)
Establish the hardening model of TA32 titanium alloy, the yield function expression formula of TA32 are as follows:
It is wherein known:
A=A (ε)
N=n (ε)
α=α (ε)
Therefore, in isothermal thermal forming, local derviation is asked to obtain strain and strain rate:
Establish TA32 titanium alloy FLD strain forming limit failure criteria:
εmax=-0.0001536 εmin 3+0.00658εmin 2+0.1031εmin+30.36
It establishes TA32 titanium alloy blank plate and corrugated Critical Buckling stress function occurs；
It quantitatively determines in transfer edge dislocationUnder Critical Buckling stress be
Wherein the R under thermoforming temperatures of TA32 titanium alloy is about 0.8, strain hardening exponent n value and temperature, judgement of speed change
The relational expression of rate are as follows:
By theory it is found that the Critical Buckling stress of thin-wall parts of biggish size itself is lower, especially heat at
In shape technique, hot conditions exacerbate the softening of material, so that Instability buckling stress further decreases.And it was shaping
Cheng Zhong, plate surrounding do not carry out any constraint, therefore the material of part surrounding is inevitably to intermediate flow, cause
Pressure-compressive stress state easy to form, aggravates rugosity degree near heart point.
For large scale complexity TA32 titanium alloy covering part hot forming, wrinkle theoretical prediction the result shows that, pass through change
σ3/σ1=σz/σx=α and increase pressure, i.e., change into pressure-tensile stress state, Ke Yixian for central area pressure-compressive stress state
The corrugation behavior of the improvement plate of work, and then remove wrinkle.
Based on above-mentioned material parameter model and plate mold digital-to-analogue, above-mentioned material parameter constitutive model is compiled into
FORTRAN code, and write referring to the format of the VUHARD subroutine interface of ABAQUS, it can be used to ABAQUS's
In Explicit solver；Input material elasticity modulus, Poisson's ratio, FLC curve model, Critical Buckling stress function etc.；It draws
Divide good grid, it is imitative that setting load and boundary condition etc. complete the hot formed finite element of variable curvature special-shaped thin wall titanium alloy covering part
The foundation of true mode, finite element model are as shown in Figure 5；
The part forming result is as shown in Figure 6 a, is shown by Stress Map, the part mainly shape in without apparent office
Portion's plastic deformation, the failure mode of forming predominantly corrugation unstability.By comparison plate central symmetry axes deformation after form with
Theoretical part digital-to-analogue centre line shape shows that rugosity form is originating primarily from as shown in Figure 6 b to assess the rugosity degree of generation
The area part I, II has a common boundary, and then uniformly to the less area II diffusion profile is deformed, rugosity form extends to the right as wavy.
Plate is forced to bend since the area I touches mold and punching head at first, flexural center is by inside material toward the area I, II boundary center
Point pushes, and causes material to be gathered at the point of interface in the area I, II, therefore reach bifurcation at first herein, is easy to happen corrugation and loses
Surely.
According to corrugation Unstability Theory, pressure-tension state limit stress is twice of limit stress of pressure-pressure condition, by repairing
The method restrained boundary condition for changing mold can improve the stability of plate in forming process, to mitigate the corrugated journey of unstability
Degree.Therefore it can change the stress state of plate each point in forming process by modifying mould structure, shaped to reduce
The corrugation degree of journey.Scheme schematic diagram is as shown in Figure 7 after mould structure modification.The main circle in figure of the modification of mould structure
Region is changed to sunk type mould structure, while increasing the boundary dimensions of blank.Forming Simulation result after modification mould structure
As shown in figure 8, causing the plate of near border and mold to occur mutual since bending has occurred in forming process plate boundary
Friction, therefore limit material and flowed to central point.The modification measure, which is equivalent to, constrains plate boundary, when central point occurs
When deformation, the boundary condition of width direction is changed to displacement constraint from moving freely.Therefore micro- when Instability near central point
First stress is changed to pressure-drawing by pressure-pressure, and rugosity defect is improved after forming.In general, simulation result shows to change
Boundary condition can effectively inhibit the degree of rugosity generation.
Original formation as a result, the central area of formation of parts have occurred it is rugosity.Part surrounding in original formation technical process
Material is inevitably flowed toward center, is led to pressure-compressive stress state easy to form near central point, has been aggravated rugosity
Degree.Forming results and simulation and prediction result are almost the same.As a result it is larger to also show the corrugated lines wave crest, serious shadow
Ring the form accuracy of part.And after process optimization, rugosity degree can be inhibited, part corrugated regions become smaller, and substantially meet
The requirement of part.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the principle of the present invention, several improvement can also be made, these improvement also should be regarded as the present invention
Protection scope.
Claims (5)
1. a kind of large-scale complex thin-wall titanium alloy member hot forming corrugation prediction and control method, which is characterized in that specific steps
It is as follows:
Step 1: establishing titanium alloy thin wall component hot forming corrugation prediction theory；
Step 2: obtaining mechanical parameters, the corrugated Critical Buckling of blank plate generation is obtained in conjunction with corrugation prediction theory and is answered
Force function predicts that corrugated region may occur for sheet forming process according to practical sheet forming process；
Step 3: being based on mechanical parameters model and plate mold digital-to-analogue, the hot formed finite element simulation of sheet metal part is established
Model；
Step 4: the corrugated regions that the possibility of theoretical prediction to that the sheet metal component after corrugated region and simulation forming occur carry out pair
Than determining corrugated regions and corrugation reason；
Step 5: the transfer characteristic based on material, optimizes original blank shape and mould structure, then carry out analog simulation point
Analysis；
Step 6: repeat Step 3: four, five, reaches after product technology requires after analog simulation result, carry out practical sheet metal part
Hot forming production；
Step 7: advanced optimizing original blank shape and mould structure for actual production result, produce again.
2. a kind of large-scale complex thin-wall titanium alloy member hot forming corrugation prediction according to claim 1 and control method,
It is characterized in that, the step one specifically:
1.1, plate is set in one direction by the compression stress in plane, in the other directions by the drawing in plane
Stretch stress and general constraints power effect under pressure-pad-force p, for buckling plate and intact plate, load be by dullness and at than
The increased boundary displacement u of examplexIt carries out, draw direction stress σzWith the compression stress ot on the direction xxIt is proportional, i.e. σz/σx=α,
Middle stress ratio α is assumed to be constant；It is assumed that in the case where ignoring shear stress, i.e. σ3/σ1=σz/σx=α, thus with principal stress and
Strain is to describe following stress state；Assuming that under tension, buckling plate and plate have identical on third direction
Strain increment Δ ε3；
1.2, it is in-plane anisotropy by material modeling, anisotropy is indicated with parameter R, which is thin in simple extension test
The ratio between the plastic strain of width plastic strain and thickness direction in plate plane；Equivalent stress and equivalent strain are as follows:
The strain hardening behavior of material is described with Alfred Swift formula:
Wherein, K is strength of materials coefficient, and n is strain hardening exponent, ε0It is prestrain；
For a plate, in given edge dislocation uxUnder/L, the corresponding components of strainIt can indicate are as follows:
Compared with no horizontal tension the case where, i.e. α=0, we are available strain increment Δ ε3:
Formula is brought into obtain the equivalent strain of plate are as follows:
Wherein
Therefore, under edge compression and horizontal tension effect, the strain energy E of per unit width on plate0It can indicate are as follows:
1.3, correspondingly, the strain energy E of buckling plate unit widthwIt can obtain in the following manner:
In given edge dislocation uxUnder/L, the deformed shape of buckling plate be can be assumed as a sine wave:
Y=δ (1+cos (mx))
Wherein m is the frequency under associative mode；
Based on material Incoercibility and it is without thickness change it is assumed that available per unit width volume are as follows:
Simplify processing, the projection amplitude that our available condition shapes are by Taylor expansion are as follows:
1.4, using the sequential cells finite element analysis for simplifying integral, in the case where no horizontal tension, displacement components uzIt is considered equal
Even, therefore corresponding strain stresszIt is constant is zero, under tensioned effect, it is assumed that buckling plate and have on plate identical
Strain increment Δ ε3, for twisted plate large deformation, external strain εz, radial strain εrWith circumferential strain εθAre as follows:
εz=Δ ε3
εθ=ln (r/ru)
εr=-Δ ε3-ln(r/ru)
Have been generally acknowledged that Δ ε3< < εθ, the equivalent strain of buckling plate can simplify are as follows:
Wherein,
Wherein r is radius of curvature, ruIt is the radius of curvature on non-stretched surface；If riAnd r0It is bent to respectively indicate twisted plate inner and outer surfaces
The radius of rate；Equally, by the indeformable of volume, available ruAre as follows:
Wherein
r0=ri+t
Under the hypothesis of no thickness change, non-stretched plate is overlapped with the middle surface of twisted plate；
1.5, using Deformation Theory, have studied under edge compression and cross directional stretch effect, the twisted plate of per unit width is answered
Becoming can EwIt can indicate are as follows:
It is approximately: by Taylor expansion
By calculating E0, EwAnd δ, available Critical Buckling stress are as follows:
In order to findRespectively with L1、L2Relationship, establish following relationship:
Therefore, we can quantitatively determine in transfer edge dislocationUnder Critical Buckling stress are as follows:
It can be seen that corrugated limit stress depends on the mechanics parameter of pressure suffered by plate, stress state and material, it may be assumed that
σcr=f (p, α, n, K, R, ε0)。
3. a kind of large-scale complex thin-wall titanium alloy member hot forming corrugation prediction according to claim 1 and control method,
It is characterized in that, the step two specifically:
2.1, establish the hardening model of corresponding titanium alloy member；
2.2, establish titanium alloy member FLD strain forming limit failure criteria；
2.3, it establishes titanium alloy blank plate and corrugated Critical Buckling stress function occurs；
2.4, according to practical sheet forming process, predict that corrugated region may occur for sheet forming process and improve plate to rise
The method of wrinkle behavior.
4. a kind of large-scale complex thin-wall titanium alloy member hot forming corrugation prediction according to claim 1 and control method,
It is characterized in that, the step four specifically: obtain the failure mode of forming according to part forming result；By comparing plate
To assess rugosity degree occurs for form with theoretical part digital-to-analogue centre line shape after central symmetry axes deformation, further according to rugosity
Form determines corrugated regions and corrugation reason.
5. a kind of large-scale complex thin-wall titanium alloy member hot forming corrugation prediction according to claim 1 and control method,
It is characterized in that, the titanium alloy is large scale complexity TA32 titanium alloy covering part.
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| CN112507567A (en) * | 2020-12-22 | 2021-03-16 | 重庆科技学院 | Method for predicting instability defect of forged microstructure of titanium alloy forging |
| CN114563312A (en) * | 2022-01-27 | 2022-05-31 | 苏州大学 | Method and device for measuring mechanical property of film |
| CN116564443A (en) * | 2023-04-11 | 2023-08-08 | 中南大学 | Plate-shaped piece spinning flange wrinkling prediction method based on finite element simulation analysis |
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| CN114563312A (en) * | 2022-01-27 | 2022-05-31 | 苏州大学 | Method and device for measuring mechanical property of film |
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