the variability of material property measurements · the variability of material property...
TRANSCRIPT
![Page 1: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/1.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability ofMaterial Property Measurements
The importance of proper yield stress-strain curvesfor simulation results
G. H. Arfmann, M. TwicklerCPM GmbH, Herzogenrath
![Page 2: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/2.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
• Simulation applications- Geometry, Material flow- Stresses, Tool failure- Grain distribution
• Material data requirements to do a proper simulation- Complete set of data- Method of measurement- accurate measurement
• Methods to measure yield stress – strain curves• Problems of standardization
- Curves from different origin and the Influence on results• Conclusions
![Page 3: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/3.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
• Diagnostic offailures duringprocess design
Failure of a punchWrong preformdesign
![Page 4: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/4.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
• Diagnostic offailures duringprocess design
Failure of a punchWrong preformdesign
![Page 5: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/5.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
• Diagnostic offailures duringprocess design
Failure of a punchWrong preformdesign
![Page 6: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/6.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
• Diagnostic offailures duringprocess design
Failure of a punchWrong progressiondesign
![Page 7: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/7.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
• Diagnostic offailures duringprocess design
Failure of a punchWrong progressiondesign
![Page 8: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/8.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
• Diagnostic offailures duringprocess design
Failure of a punchWrong progressiondesign
![Page 9: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/9.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
• Diagnostic offailures duringprocess design
Failure of a punchWrong progressiondesign
![Page 10: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/10.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
• Diagnostic offailures duringprocess design
Failure of a punchWrong progressiondesign
![Page 11: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/11.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
• Diagnostic offailures duringprocess design
Failure of a punchWrong progressiondesign
![Page 12: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/12.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
• Diagnostic offailures duringprocess design
Failure of a punchWrong progressiondesign
![Page 13: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/13.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
• Diagnostic offailures duringprocess design
Failure of a punchWrong progressiondesign
![Page 14: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/14.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
• Hammer forging
Analysis of theTemperaturedistribution after 18blows
![Page 15: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/15.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
• Hammer forging
Analysis of theTemperaturedistribution after 18blows
![Page 16: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/16.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
• Prediction of grainsize distributionduring forging
Correct modeling of allboundary conditions:- Temperature- Machine- Material- ……..
![Page 17: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/17.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
• Prediction of grainsize distributionduring forging
Correct modeling of allboundary conditions:- Temperature- Machine- Material- ……..
![Page 18: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/18.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
• Prediction of grainsize distributionduring forging
Correct modeling of allboundary conditions:- Temperature- Machine- Material- ……..
![Page 19: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/19.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
• Prediction of grainsize distributionduring forging
Correct modeling of allboundary conditions:- Temperature- Machine- Material- ……..
![Page 20: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/20.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
• Prediction of grainsize distributionduring forging
Correct modeling of allboundary conditions:- Temperature- Machine- Material- ……..
![Page 21: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/21.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
• Prediction of grainsize distributionduring forging
Correct modeling of allboundary conditions:- Temperature- Machine- Material- ……..
![Page 22: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/22.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
• Prediction of grainsize distributionduring forging
Correct modeling of allboundary conditions:- Temperature- Machine- Material- ……..
![Page 23: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/23.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
To get a good simulation result we need
a good understanding of the process and the relevant models to be usedin simulation
the best available data to describe the physical behavior of the material
etc ..
The most important data are YS-Strain curves.
![Page 24: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/24.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
Stress Strain Curve datahas to be
- complete, covering the range of temperature,strain rate, strain etc. of the application- reliable, not depending where it is comingfrom- precise- ……
![Page 25: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/25.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
Stress Strain Curve
QualitySourceDocumentation
![Page 26: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/26.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
Stress Strain CurveQualitySource (Type of Test)Documentation
Tension testCompression TestTorque Test
![Page 27: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/27.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
Stress Strain CurveQualitySource (different locations)Documentation
Compression Testnon reliable data form different
sourcesBased on a study of NPL, UK
![Page 28: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/28.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
Stress Strain CurveQualitySourceDocumentation
Influence on geometry
![Page 29: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/29.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
Stress Strain CurveQualitySourceDocumentation
Influence on localdeformation
![Page 30: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/30.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
Stress Strain CurveQualitySourceDocumentation
Influence on materialflow
![Page 31: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/31.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
Stress Strain CurveQualitySourceDocumentation
Different sources
Source: BFI/VDEh
![Page 32: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/32.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
Stress Strain CurveQualitySourceDocumentation
Different sources
Source: DGM
![Page 33: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/33.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
Stress Strain CurveQualitySourceDocumentation
Different sources
Source: Umformtechnik, Lange
![Page 34: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/34.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
Stress Strain CurveQualitySourceDocumentation
Different sources
Source: VDI
![Page 35: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/35.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
Stress Strain CurveQualitySourceDocumentation
Different sources
Source: ASM Atlas of Stress-Strain Curves
![Page 36: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/36.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
Stress Strain CurveQualitySourceDocumentation
Different sources
Source: Hensel/Spittel
![Page 37: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/37.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
Stress Strain CurveQualitySourceDocumentation
Different sources have different approaches todo the testing, procession anddocumentation.
Results from different sources are different.
![Page 38: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/38.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
Stress Strain CurveQualitySourceDocumentation
MaterialHistoryTest parameter
Data
![Page 39: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/39.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
Stress Strain CurveQualitySourceDocumentation (of Data)
YS – Strain curveCold
![Page 40: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/40.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
Stress Strain CurveQualitySourceDocumentation (of Data)
YS – Strain curveWarm
![Page 41: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/41.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
Stress Strain CurveQualitySourceDocumentation (of Data)
YS – Strain curve
Decomposition todescribe the curve by amath. Regressionanalysis
![Page 42: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/42.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
Stress Strain CurveQualitySourceDocumentation (of Data)
Most of the sources use mathematical modelsto describe the YS-Strain curves.
This is a manipulation which might end upnegative on the quality.
![Page 43: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/43.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
Stress Strain CurveQualitySourceDocumentation (of Data)
YS – Strain curveFailure caused by
mathematical description
![Page 44: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/44.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
Stress Strain CurveQualitySourceDocumentation of Data
Material data should be made available in it'smeasured quality (corrected because of failurescaused by the measurement method only)!
![Page 45: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/45.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
Stress Strain CurveQuality of dataSourceDocumentation
Material data should be investigated alongscientifically agreed best practice standards !These still have to be developed.
![Page 46: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/46.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
Stress – Strain CurveQualitySourceDocumentation
Example of a good approach
Tooling inside a furnaceDrawing courtesy of CPM Materialdatenzentrum
![Page 47: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/47.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
Stress – Strain CurveQualitySourceDocumentation
Example of a good approach
Servo-hydraulic press
Photo courtesy of Servotest
![Page 48: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/48.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
Stress – Strain CurveQualitySourceDocumentation
Example of a good approach
Filtering of dataDrawing courtesy of CPM Materialdatenzentrum
![Page 49: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/49.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
Stress – Strain CurveQualitySourceDocumentation
Example of a good approach
Storing the data
![Page 50: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/50.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
Stress Strain Curve Results
Quality Standards of best practice must bedeveloped!
Source Sources today use varying methodswith different quality
Documentation Beside other important things thedata should be provided in themeasured form without anymathematical regressions done.Such regressions etc should be done inthe application at the responsibility ofthe user
![Page 51: The variability of Material Property Measurements · The variability of Material Property Measurements The importance of proper yield stress-strain curves ... Source: ASM Atlas of](https://reader030.vdocument.in/reader030/viewer/2022020315/5adb67717f8b9a86378e9756/html5/thumbnails/51.jpg)
21. Mai 2004 (c) 2004 CPM GmbH,Herzogenrath,Germany
ICFG Workshop Simulation, Schanghai 2004
The variability of Material Property Measurements
• Thank you for yourInterest
Please feel free tocontact us