This section presents an example of the data input required to create a thermoplastic UDB file.

1. Create a blank material data file (.aml)

2. General Information

• Complete material information and click Apply

3. Filler

• Complete filler data for filled materials and click Apply

4. Processing and Design

• Complete Melt temperature and range, Mold temperature and range, Absolute maximum melt temperature, Transition temperature & Ejection temperature data and click Apply

5. Specific Heat

• Upload raw data containing Temperature, Specific Heat & Heating/Cooling rate. Click Apply then Plot to view data

Semi Crystalline grades typically display a sharp peak

Amorphous grades typically display a smooth transition

6. Thermal Conductivity

• Upload raw data containing Temperature, Thermal Conductivity & Heating/Cooling rate. Click Apply then Plot to view data

7. Viscosity Input

• Choose the type of viscosity input from the following options based on raw data:

  • Capillary rheometer data (Temperature, Shear rate, Viscosity, Die Diameter, Die L/D Ratio)
  • Slit die rheometer data (Temperature, Shear rate, Viscosity, Slit Height, Slit Width, Slit Length)
  • Basic viscosity data (Temperature, Shear rate, Viscosity)
  • Cross-WLF Model (no experimental data)

• Upload raw data and click Apply then Plot to view data

8. PVT Input

• Choose Generic PVT data if no experimental data is available

• Choose Input raw data and upload data containing Pressure, Temperature & Specific Volume. Click Apply then Plot to view data

Semi Crystalline grades typically display a sharp transition

Amorphous grades typically display a smooth transition

9. Mechanical Input

• Choose Generic Mechanical data if no experimental data is available

• Choose Input raw data and complete Elastic modulus, Poissons ratio, Shear Modulus & CTE data and click Apply

10. Upload any optional material data

11. Check Input

• Click Check Input to perform data check. Address any errors before proceeding

12. Compute Results

• Click Compute Results to fit the following * models:
  • Viscosity Model
  • PVT Model
  • Ramberg-Osgood Stress-Strain Model (if data is provided)

13. Check Results

• Click Check Results to perform data check. Address any errors before proceeding

14. PVT Model

• Click PVT Model and Plot to view the fitted and experimental data

Modifying transition temperature (optional)

• Move the two red X points to match the transition point for the low and high pressure respectively

• Right-click and select Refit

15.Viscosity Model

• Click Viscosity Model and Plot to view the fitted and experimental data

Modifying viscoity model (optional)

• Modify coefficients in the Cross-WLF model manually and select the check-box Keep constant fixed for values that should not change during refitting

• Select Fit Viscosity to refit data

16. Generate UDB

• Once data fitting is completed, check Generate UDB to create the 21000.udb file for use in Moldflow analysis

Note: AMDF does not support Thermoset datafitting functionality. User should contact the Autodesk Moldflow sales team or datafitting.moldflow@autodesk.com