CN106407614A - Method for acquiring weld seam structure mechanical parameters in combination with nanoindentation and finite elements - Google Patents
Method for acquiring weld seam structure mechanical parameters in combination with nanoindentation and finite elements Download PDFInfo
- Publication number
- CN106407614A CN106407614A CN201610979809.2A CN201610979809A CN106407614A CN 106407614 A CN106407614 A CN 106407614A CN 201610979809 A CN201610979809 A CN 201610979809A CN 106407614 A CN106407614 A CN 106407614A
- Authority
- CN
- China
- Prior art keywords
- curve
- simulation
- displacement curve
- load displacement
- strain
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Computer Hardware Design (AREA)
- Evolutionary Computation (AREA)
- Geometry (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Investigating And Analyzing Materials By Characteristic Methods (AREA)
Abstract
The invention discloses a method for acquiring weld seam structure mechanical parameters in combination with nanoindentation and finite elements. According to the method, a load-displacement curve obtained in the finite element modeling weld metal nanoindentation process is changed by changing input parameters until the load-displacement curve coincides with a load-displacement curve obtained in an actual weld metal nanoindentation experiment, corresponding parameter yield strength, strain strengthening coefficient, strain rate influence coefficient and strain strengthening index are taken as weld metal mechanical property parameters, and the obtained weld mechanical property parameters are used for simulation of weld metal mechanical behaviors. According to the method, the weld metal mechanical property parameters can be obtained conveniently and simply.
Description
Technical field
The present invention relates to a kind of combination nano impress obtains welded seam area material mechanical parameters with finite element modelling
Method, can be used for the emulation of weld metal mechanical behavior, belongs to material mechanical performance representational field.
Background technology
The mechanical property of material refers to the macro-mechanical property in room temperature, under action of static load.Main include intensity, hardness,
Rigidity, plasticity, toughness etc., it is to determine the Main Basiss of various parameters of engineering designs.At present, the mechanical property parameters of material are main
By stretching, compression, bending, shearing, the conventional test methods test such as impact and hardness.This kind of test is easy under macro-scale
Operation, but pass through these traditional mechanical test methods when we need the mechanical property parameters measuring material domain
It is difficult to obtain.The different branches that becomes forms different tissues, and different tissues just has different mechanical properties and characterizes.Example
If 316LN austenitic stainless steel weld joint is due to the segregation induced dislocations tangled shape of Cr and Mo element in nonequilibrium solidification process
Become natural low-angle sub boundary, so that the sub boundary of seam organization and subgrain region have different mechanical properties.Simulation
Crackle in the subgrain of weld seam and sub boundary propagation behavior when, need to measure respectively the mechanical property ginseng in sub boundary and subgrain
Count and to calculate the cracks can spread energy of two different microcells, these mechanical property parameters need to measure under micro-scale, lead to
It is impracticable for crossing traditional mechanic property test method.
Nanoindentation be also referred to as depth sensitivity indentation, be simplest test material mechanical property method it
One, the various mechanical properties of material can be measured on nanoscale.Nanoindentation is lossless due to having, can be minimum
In the range of measure material mechanical property.Obtained in recent years widely should very much in terms of the Micro Mechanical Properties research of material
With.The hardness of the even nano level coating of micron or thin film on some components is mainly measured in terms of MEMS；?
Biological engineering aspect mainly measures bone, the mechanical property of the biological tissue such as tooth or cell；Can in terms of special material research
To use the consistency and elasticity modulus of very small load measurement material in the region of very little.In addition, it is in tribology
Can research also be applied with information technology aspect.
Notification number CN101266202A discloses a kind of method extracting material mechanical performance, and the method combines cavern model
Theoretical with plasticity it is proposed that a kind of new representative strain and with combine method for numerical simulation for bridge, set up energy
Relational expression and material plasticity mechanics parameter between for the ratio, final elastic modelling quantity, yield strength and the hardenability value obtaining material.
But there are following confinement problems in said method；One is that theoretical basiss requirement is higher, needs testing staff to enter
The special correlation theories knowledge of row learns so that the application and popularization of this method are very restricted；But derivation ratio
More complicated, amount of calculation is than larger.It is therefore proposed that one kind can be simple, the convenient method obtaining material mechanical parameters is very
It is necessary.
Content of the invention
The technical problem to be solved is to provide a kind of nano impress that combines to obtain seam organization power with finite element
The method learning parameter, can be used for the emulation of weld seam mechanical behavior.
Mechanics parameter includes yield strength, strain hardening coefficient, and strain rate affects coefficient, work-hardening exponential.
For achieving the above object, the combination nano impress of the present invention and finite element modelling obtain the welded seam area mechanics of materials
The method of energy parameter, concretely comprises the following steps：
1) extremely can just be in microscope with corrosive liquid slight erosion after mechanical polishing by the weld metal sample of suitable dimension
The lower degree differentiating different tissues region；
2) above-mentioned ready sample is fixed on nano-hardness tester, choose suitable pressure head, pressure head loading speed, maximum load,
Protect load time and discharge rate, carry out nano indentation test, obtain real load displacement curve；
3) utilize Finite Element Simulation Software simulate nano impress process, from Johnson-Cook model as weld metal basis
Structure relation, inputs parameter yield strength σ0, strain hardening factor alpha, strain rate impact factor beta, work-hardening exponential n, reference
Strain rate0, solved by solver, obtain the simulation load displacement curve of finite element modelling nano impress process.
4) simulation load displacement curve is compared with real load displacement curve, by changing parameter up to simulation curve
It coincide with actual curve；When simulation curve and actual curve coincide, parameter yield strength σ of input0, strain hardening factor alpha,
Strain rate impact factor beta, work-hardening exponential n are treated as the mechanical property parameters of weld metal.
The weld metal when mechanical property parameters of the weld metal obtaining can emulate as weld metal mechanical behavior
Actual mechanical property parameters.
Repairing is just being simulated in load displacement curve and actual curve anastomosis procedures, when the maximum load of simulation curve and guarantor carry
Between set constant, input parameter in the moulding strain rate of reference be according to the position in actual nano-indentation experiment
Shifting-time graph determines, yield strength is to be determined according to the actual nano impress displacement curve of load.
The simulation load displacement curve being calculated according to the value of consult volume of first time input and actual load displacement curve
Be compared, the curve according to uninstall process first adjusting the strain rate impact factor v of input parameter, when simulating
The slope of the load displacement curve uninstall process coming is more than real load displacement curve uninstall process slope of a curve, then should reduce
The strain rate impact factor v of input parameter；On the contrary, when simulation, the slope of load displacement curve uninstall process out is little
In real load displacement curve uninstall process slope of a curve, then should increase the strain rate impact factor v of input parameter,
Until the slope of the uninstall process load displacement curve of simulation and actual equal, then the strain rate impact coefficient now inputting
Just by survey welded seam area logarithmic strain speed impact coefficient.
Load displacement curve further according to loading procedure to adjust input parameter strain hardening coefficient, work-hardening exponential
Numerical value, when the load displacement curve in the loading procedure of simulation is above actual curve, reduces input parameter strain hardening system
Number, the numerical value of work-hardening exponential；When the load displacement curve in the loading procedure of simulation is below actual curve, increase defeated
Enter parameter strain hardening coefficient, the numerical value of work-hardening exponential；Load displacement curve first half in the loading procedure of simulation
Divide latter half above actual curve below actual curve, to increase strain hardening factor v, reduce strain hardening and refer to
The numerical value of number；When simulation loading procedure in load displacement curve first half below actual curve latter half in reality
Above the curve of border, reduce strain hardening factor v, increase the numerical value of work-hardening exponential, until curve and the reality of simulation
Curves.The calculating speed of computer quickly, can obtain simulation curve in the short period of time and actual curve coincide.
The present invention is by comparing the load displacement curve that nano-indentation experiment obtains and finite element modelling nano impress process
The simulation load displacement curve obtaining, changes parameter until simulation load displacement curve and actual displacement curve match, obtains
Material mechanical parameters in the minimum subrange of surveyed weld metal.Particularly when need measure weld metal difference group
During the mechanical property parameters knitted, can be simple by the method for the present invention, convenient acquisition.
Brief description
Fig. 1 is the scanning electron microscope of 316LN austenitic stainless steel weld joint（SEM）Picture；
Fig. 2 is the actual nano impress picture of 316LN austenitic stainless steel weld joint metal；
Fig. 3 is the nano impress model of 316LN austenitic stainless steel weld joint metal simulation；
Fig. 4 is the load displacement curve during the actual nano impress of 316LN austenitic stainless steel weld joint metal and finite element mould
Load displacement curve during plan nano impress.
Specific embodiment
Further illustrate the present invention with reference to embodiment.Because in 316LN, the alloying element content such as Cr, Ni, Mo, Mn is relatively
Height, there is composition cluster in weld metal in nonequilibrium solidification process.The enrichment of large scale Mo atom causes this region atom wrong
Row and dislocation tangle and form low-angle sub boundary.As shown in figure 1, part bright in vain is sub boundary, dark part is subgrain
Inner region.The stress field that the Mo atom strong solution strengthening effect that causes of enrichment and dislocation tangle cause makes sub boundary and Asia
Transgranular mechanical property characterizes.Make them because different with sub boundary mechanical properties in subgrain characterizes to crack initiation and expansion
Exhibition has opposite impacts on.In propagation behavior in 316LN austenitic stainless steel weld joint metal for the simulating crack, required use
To the mechanical property parameters of zones of different can be obtained by the method for the present invention.
Embodiment one
1）By after 10 × 10mm face mechanical polishing of the 316LN weld metal of a size of 10 × 10 × 5mm with volume ratio it is
HNO3：HCL：H2O=1：1：1 corrosion corrosion is to the degree that can just tell different tissues under early microscope（As Fig. 1）.
2）The button of above-mentioned preparation is fixed on nano-hardness tester and carries out nano-indentation experiment, the pressure of this experiment
Head model triangular pyramid berkvoich pressure head；Radius of curvature 50mm；The loading velocity of pressure head is 13.3 μ N/s；Maximum load
4000 μ N and holding 2min；Discharge rate is identical with loading velocity.In experimentation, make a call to an impression every 3 μm of distances, know
Road has enough impressions to entirely fall within subgrain and sub boundary region respectively（As shown in Figure 2）, impression have simultaneously covering Liang Ge area
Domain, is considered as invalid data.Select to meet the nano impress load displacement curve in the indentation data acquisition subgrain requiring and subgrain
The nano impress displacement curve on boundary.
3）The Finite Element Simulation Software that this experiment adopts is ABAQUS, using ABAQUS to triangular pyramid pressure head, weld seam gold
Belong to modeling（As shown in Figure 3）, from JC model as weld metal constitutive relation.
4）Corresponding parameter yield strength σ is arbitrarily set0, strain hardening factor alpha, strain rate impact factor beta, strain strong
Change index n, reference strain rate0Initial value simultaneously inputs, and submits to standard solver to solve.The load position that solution is obtained
The load displacement curve moving the nano-indentation experiment gained in curve and sub boundary compares, and then constantly changes these parameters straight
It coincide to simulation curve and actual curve（As shown in Figure 4）.Now, value of consult volume yield strength σ of input0, strain hardening coefficient
α, strain rate impact factor beta, work-hardening exponential n are treated as the mechanical property parameters of sub boundary, as shown in table 1.
Table 1
| Mechanical property parameters | Yield strength σ 0/MPa | Strain hardening factor alpha/MPa | Strain rate affects factor beta | Work-hardening exponential n |
| Sub boundary | 455 | 2120 | 0.01262 | 0.35 |
5）Corresponding parameter yield strength σ is arbitrarily set0, strain hardening factor alpha, strain rate impact factor beta, strain hardening refer to
Number n, reference strain rate0Initial value and input, submit to standard solver solve.The load displacement that solution is obtained
The load displacement curve of the nano-indentation experiment gained in curve and subgrain compares, and then constantly changes these parameters up to mould
Pseudocurve and actual curve coincide（As shown in Figure 4）.Now, value of consult volume yield strength σ of input0, strain hardening factor alpha, should
Variable Rate impact factor beta, work-hardening exponential n are treated as the mechanical property parameters in subgrain, as shown in table 2.
Table 1
| Mechanical property parameters | Yield strength σ 0/MPa | Strain hardening factor alpha/MPa | Strain rate affects factor beta | Work-hardening exponential n |
| In subgrain | 325 | 1854 | 0.01262 | 0.42 |
6）The mechanical property parameters in seam organization sub boundary and subgrain obtaining are used for cracks can spread behavior in weld metal
Sunykatuib analyses.
Embodiment two, the step being embodied as is as follows：
1）By after 10 × 10mm face mechanical polishing of the 316LN weld metal of a size of 10 × 10 × 5mm with volume ratio it is
HNO3：HCL：H2O=1：1：1 corrosion corrosion is to the degree that can just tell different tissues under early microscope.
2）The button of above-mentioned preparation is fixed on nano-hardness tester and carries out nano-indentation experiment, the pressure of this experiment
Head model triangular pyramid berkvoich pressure head；Radius of curvature 50mm；The loading velocity of pressure head is 13.3 μ N/s；Maximum load
4000 μ N and holding 2min；Discharge rate is identical with loading velocity.In experimentation, make a call to an impression every 3 μm of distances, know
Road has enough impressions to entirely fall within subgrain and sub boundary region respectively, and impression has two regions of covering simultaneously, and it is invalid to be considered as
Data.Select to meet the nano impress of nano impress load displacement curve and sub boundary in the indentation data acquisition subgrain requiring
Displacement curve.
3）The Finite Element Simulation Software that this experiment adopts is ABAQUS, using ABAQUS to triangular pyramid pressure head, weld seam gold
Belong to modeling, from JC model as weld metal constitutive relation.
4）Corresponding parameter yield strength σ is arbitrarily set0, strain hardening factor alpha, strain rate impact factor beta, strain strong
Change index n, reference strain rate0Initial value simultaneously inputs, and submits to standard solver to solve.The load position that solution is obtained
The load displacement curve moving the nano-indentation experiment gained in curve and sub boundary compares, and then constantly changes these parameters straight
It coincide to simulation curve and actual curve.Now, value of consult volume yield strength σ of input0, strain hardening factor alpha, strain rate shadow
Sound factor beta, work-hardening exponential n are treated as the mechanical property parameters of sub boundary, as shown in table 3.
Table 3
| Mechanical property parameters | Yield strength σ 0/MPa | Strain hardening factor alpha/MPa | Strain rate affects factor beta | Work-hardening exponential n |
| Sub boundary | 458 | 2117 | 0.01260 | 0.37 |
5）Corresponding parameter yield strength σ is arbitrarily set0, strain hardening factor alpha, strain rate impact factor beta, strain hardening refer to
Number n, reference strain rate0Initial value and input, submit to standard solver solve.The load displacement that solution is obtained
The load displacement curve of the nano-indentation experiment gained in curve and subgrain compares, and then constantly changes these parameters up to mould
Pseudocurve and actual curve coincide.Now, value of consult volume yield strength σ of input0, strain hardening factor alpha, strain rate impact system
Number β, work-hardening exponential n are treated as the mechanical property parameters in subgrain, as shown in table 4.
Table 4
| Mechanical property parameters | Yield strength σ 0/MPa | Strain hardening factor alpha/MPa | Strain rate affects factor beta | Work-hardening exponential n |
| In subgrain | 323 | 1851 | 0.01260 | 0.40 |
6）The mechanical property parameters in seam organization sub boundary and subgrain obtaining are used for cracks can spread behavior in weld metal
Sunykatuib analyses.
Claims (3)
1. a kind of combination nano impress and finite element obtain the method for seam organization mechanics parameter it is characterised in that concrete steps
As follows：
1) extremely can just be in microscope with corrosive liquid slight erosion after mechanical polishing by the weld metal sample of suitable dimension
The lower degree differentiating different tissues region；
2) above-mentioned ready sample is fixed on nano-hardness tester, choose suitable pressure head, pressure head loading speed, maximum load,
Protect load time and discharge rate, carry out nano indentation test, obtain real load displacement curve；
3) utilize Finite Element Simulation Software simulate nano impress process, from Johnson-Cook model as weld metal basis
Structure relation, inputs parameter yield strength σ0, strain hardening factor alpha, strain rate impact factor beta, work-hardening exponential n, reference
Strain rate0, solved by solver, obtain the simulation load displacement curve of finite element modelling nano impress process；
4) simulation load displacement curve is compared with real load displacement curve, by changing parameter up to simulation curve and reality
Border curves；When simulation curve and actual curve coincide, parameter yield strength σ of input0, strain hardening factor alpha, strain
Speed impact factor beta, work-hardening exponential n are treated as the mechanical property parameters of weld metal.
2. method according to claim 1 is it is characterised in that repairing is just simulating load displacement curve and real load displacement
During curves, simulation load displacement curve and actual load position that the value of consult volume according to inputting for the first time calculates
Move curve to be compared, the curve according to uninstall process affects factor v come the strain rate adjusting input parameter first, when
The slope of simulation load displacement curve uninstall process out is more than real load displacement curve uninstall process slope of a curve, then
The strain rate impact factor v of input parameter should be reduced；On the contrary, the load displacement curve uninstall process out when simulation
Slope is less than real load displacement curve uninstall process slope of a curve, then should increase the strain rate impact coefficient of input parameter
Numerical value, until the slope of the uninstall process load displacement curve of simulation and actual equal, then the strain rate shadow now inputting
Ring coefficient just be survey welded seam area logarithmic strain speed affect coefficient.
3. method according to claim 2 it is characterised in that further according to loading procedure load displacement curve to adjust defeated
Enter parameter strain hardening coefficient, the numerical value of work-hardening exponential, when the load displacement curve in the loading procedure of simulation is in reality
Curve above, reduce input parameter strain hardening coefficient, the numerical value of work-hardening exponential；Load in the loading procedure of simulation
Lotus displacement curve, below actual curve, increases input parameter strain hardening coefficient, the numerical value of work-hardening exponential；Work as simulation
Loading procedure in load displacement curve first half above actual curve latter half below actual curve, increase
Strain hardening factor v, reduces the numerical value of work-hardening exponential；Load displacement curve first half in the loading procedure of simulation
Part latter half below actual curve, above actual curve, reduces strain hardening factor v, increases strain hardening
The numerical value of index, until curve and the actual curves of simulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610979809.2A CN106407614A (en) | 2016-11-08 | 2016-11-08 | Method for acquiring weld seam structure mechanical parameters in combination with nanoindentation and finite elements |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610979809.2A CN106407614A (en) | 2016-11-08 | 2016-11-08 | Method for acquiring weld seam structure mechanical parameters in combination with nanoindentation and finite elements |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106407614A true CN106407614A (en) | 2017-02-15 |
Family
ID=58015274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610979809.2A Pending CN106407614A (en) | 2016-11-08 | 2016-11-08 | Method for acquiring weld seam structure mechanical parameters in combination with nanoindentation and finite elements |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106407614A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109900570A (en) * | 2019-03-28 | 2019-06-18 | 西安交通大学 | A kind of noncrystal membrane plastic deformation characterizing method based on Nano indentation |
| CN111062107A (en) * | 2018-10-15 | 2020-04-24 | 天津大学 | Nano indentation power law model introducing grain boundary strengthening and dislocation strengthening parameters |
| CN111189699A (en) * | 2019-12-12 | 2020-05-22 | 大连理工大学 | Method for realizing parameter inversion identification of crystal plastic material based on nanoindentation experiment |
| CN111855458A (en) * | 2020-07-23 | 2020-10-30 | 西北工业大学 | Porous material constitutive relation solving method based on nanoindentation theory |
| CN112528531A (en) * | 2020-11-11 | 2021-03-19 | 中国石油大学(北京) | Pipeline weld quality determination method, device, equipment and storage medium |
| CN112782014A (en) * | 2020-12-11 | 2021-05-11 | 成都大学 | Al (aluminum)2O3Finite element simulation method for nanoindentation of/316L stainless steel tritium resistance system |
| CN114739845A (en) * | 2022-04-20 | 2022-07-12 | 岚图汽车科技有限公司 | Method and device for detecting mechanical properties of metal welding seam and heat affected zone |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4658362A (en) * | 1984-12-24 | 1987-04-14 | Mxdonnell Douglas Corporation | Process modeling for superplastic forming of metal sheets |
| CN102288499A (en) * | 2011-08-31 | 2011-12-21 | 湖南大学 | Detection method for identifying static mechanical performance parameters of materials in different regions of weld joint |
| CN103091185A (en) * | 2011-10-31 | 2013-05-08 | 湘潭大学 | Process for characterizing elastoplasticity of metal material through indentation method |
| CN104237037A (en) * | 2014-07-23 | 2014-12-24 | 中国人民解放军装甲兵工程学院 | Material elastoplasticity parameter instrumented indentation testing method based on Berkovich indentation |
| CN104330298A (en) * | 2014-10-30 | 2015-02-04 | 北京理工大学 | Method and device for evaluating and measuring mesomechanics/micromechanics performance of surface gradient metal material |
-
2016
- 2016-11-08 CN CN201610979809.2A patent/CN106407614A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4658362A (en) * | 1984-12-24 | 1987-04-14 | Mxdonnell Douglas Corporation | Process modeling for superplastic forming of metal sheets |
| CN102288499A (en) * | 2011-08-31 | 2011-12-21 | 湖南大学 | Detection method for identifying static mechanical performance parameters of materials in different regions of weld joint |
| CN103091185A (en) * | 2011-10-31 | 2013-05-08 | 湘潭大学 | Process for characterizing elastoplasticity of metal material through indentation method |
| CN104237037A (en) * | 2014-07-23 | 2014-12-24 | 中国人民解放军装甲兵工程学院 | Material elastoplasticity parameter instrumented indentation testing method based on Berkovich indentation |
| CN104330298A (en) * | 2014-10-30 | 2015-02-04 | 北京理工大学 | Method and device for evaluating and measuring mesomechanics/micromechanics performance of surface gradient metal material |
Non-Patent Citations (2)
| Title |
|---|
| 孟龙晖 等: "纳米压痕法测量Ti6Al4V 钛合金室温蠕变应力指数", 《稀有金属材料与工程》 * |
| 蒋付强 等: "3J21 合金简化本构关系的建立及其纳米压痕试验", 《电加工与模具》 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111062107A (en) * | 2018-10-15 | 2020-04-24 | 天津大学 | Nano indentation power law model introducing grain boundary strengthening and dislocation strengthening parameters |
| CN111062107B (en) * | 2018-10-15 | 2022-08-16 | 天津大学 | Fitting method of nanoindentation power law model by introducing parameters of grain boundary strengthening and dislocation strengthening |
| CN109900570A (en) * | 2019-03-28 | 2019-06-18 | 西安交通大学 | A kind of noncrystal membrane plastic deformation characterizing method based on Nano indentation |
| CN109900570B (en) * | 2019-03-28 | 2020-10-27 | 西安交通大学 | Amorphous film plastic deformation characterization method based on nano-indentation technology |
| CN111189699A (en) * | 2019-12-12 | 2020-05-22 | 大连理工大学 | Method for realizing parameter inversion identification of crystal plastic material based on nanoindentation experiment |
| CN111189699B (en) * | 2019-12-12 | 2021-05-18 | 大连理工大学 | Method for realizing parameter inversion identification of crystal plastic material based on nanoindentation experiment |
| CN111855458A (en) * | 2020-07-23 | 2020-10-30 | 西北工业大学 | Porous material constitutive relation solving method based on nanoindentation theory |
| CN112528531A (en) * | 2020-11-11 | 2021-03-19 | 中国石油大学(北京) | Pipeline weld quality determination method, device, equipment and storage medium |
| CN112528531B (en) * | 2020-11-11 | 2023-05-19 | 中国石油大学(北京) | Pipeline weld quality determination method, device, equipment and storage medium |
| CN112782014A (en) * | 2020-12-11 | 2021-05-11 | 成都大学 | Al (aluminum)2O3Finite element simulation method for nanoindentation of/316L stainless steel tritium resistance system |
| CN114739845A (en) * | 2022-04-20 | 2022-07-12 | 岚图汽车科技有限公司 | Method and device for detecting mechanical properties of metal welding seam and heat affected zone |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106407614A (en) | Method for acquiring weld seam structure mechanical parameters in combination with nanoindentation and finite elements | |
| Qin et al. | Study on the degradation of mechanical properties of corroded steel plates based on surface topography | |
| CN103792143B (en) | Quick acquisition method of true stress strain curve in whole process of uniaxial drawing | |
| Wang et al. | Effect of constraint induced by crack depth on creep crack-tip stress field in CT specimens | |
| CN108645704B (en) | Method for calibrating microstructure parameters of metal material based on nanoindentation and finite element simulation inversion | |
| Moreno et al. | The significance of specimen displacement definition on the mechanical properties derived from Small Punch Test | |
| Wang et al. | Experimental study on the constitutive relation of austenitic stainless steel S31608 under monotonic and cyclic loading | |
| Chuzhoy et al. | Machining simulation of ductile iron and its constituents, part 1: estimation of material model parameters and their validation | |
| CN106644711B (en) | A kind of ductile material single shaft constitutive relation test method | |
| CN105426595A (en) | Method for establishing constitutive model for aluminum alloy thermal elastoplastic deformation simulation | |
| CN103886125B (en) | A kind of titanium alloy hot combined shaping method for numerical simulation | |
| Yao et al. | A new fracture criterion for ductile materials based on a finite element aided testing method | |
| CN104866652A (en) | Finite element simulation method for shot-peening strengthening deformation based on ABAQUS | |
| CN111339700B (en) | Method and device for evaluating fatigue damage of nuclear turbine blade and storage medium | |
| Lorentzen et al. | The application of fracture mechanics to surface cracks in shafts | |
| Branco et al. | Determination of the Paris law constants in round bars from beach marks on fracture surfaces | |
| CN109900554A (en) | A method of fracture toughness is calculated using indentation method | |
| Cao et al. | Inferring the temperature dependence of Beremin cleavage model parameters from the Master Curve | |
| Huang et al. | Investigation of the mechanical properties of steel using instrumented indentation test with simulated annealing particle swarm optimization | |
| Zheng et al. | Arch-dam crack deformation monitoring hybrid model based on XFEM | |
| CN108763839A (en) | A kind of centrifugal impeller boss crack propagation characteristic simulation part design method | |
| Yao et al. | A new approach on necking constitutive relationships of ductile materials at elevated temperatures | |
| Dong et al. | Fatigue crack growth of a corner crack at the edge of a hole | |
| CN107314938B (en) | The implementation method of nugget region material plastic inverting identification | |
| Calvin et al. | A new effective stress intensity factor approach to determine thickness-independent fatigue crack growth rate curves |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170215 |