Introduction to PolyUMod®

Introduction to PolyUMod

PolyUMod is a library of advanced user material models for most FE solvers.
PolyUMod is delivered as a shared library.
PolyUMod is a FE solver plugin that is used to calculate the stresses at a each integration point.

The PolyUMod actions cannot be directly seen. The software is controlled by the provided global and material-specific parameters.

Installation & Files

The PolyUMod and MCalibration installer puts all files here:

For Linux: /opt/PolymerFEM/PolyUMod

For Windows: C:\Program Files\PolymerFEM\PolyUMod

License Server

PolyUMod is controlled by the RLM network license server – http://www.reprisesoftware.com/RLM_Enduser.html
To run the PolyUMod software it is necessary to have a valid license file and a running license server.
The license file is typically created from an activation code when the software installed.
The license server can be run on any Windows or Linux computer on the local network.
The license server can be controlled through command-line arguments or using a web interface at: http://localhost:5054 where localhost is the name of the license server.

Run the test cases in one or more of the following directories to see if the PolyUMod software has been installer properly:

Linux:
/opt/PolyUMod/Abaqus_test_cases /opt/PolyUMod/ANSYS_test_cases

Windows:
C:\Program Files\PolymerFEM\PolyUMod\Test_Cases_Abaqus C:\Program Files\PolymerFEM\PolyUMod\Test_Cases_ANSYS C:\Program Files\PolymerFEM\PolyUMod\Test_Cases_COMSOL C:\Program Files\PolymerFEM\PolyUMod\Test_Cases_LSDYNA C:\Program Files\PolymerFEM\PolyUMod\Test_Cases_MSC_Marc C:\Program Files\PolymerFEM\PolyUMod\Test_Cases_Radioss

PolyUMod Material Models

1. Linear elastic (LE)
2. Neo-Hookean (NH)
3. Eight-chain (EC)
4. Bergstrom-Boyce (BB)
5. Bergstrom-Boyce with Ogden-Roxburgh Mullins effect (BBM)
6. Anisotropic Bergstrom-Boyce with Ogden-Roxburgh Mullins effect (ABBM)
7. Hybrid model (HM)
8. Multinetwork model (M8)
9. Arruda-Boyce viscoplasticity model (AB)
10. Dual Network Fluoropolymer (DNF) model
11. Three Network Model (TNM)

12. Anisotropic eight-chain model (AEC)
13. Micromechanical Foam Model (MFM)
14. Parallel network model (PNM)
15. Three Network Foam Model (TNFM)
16. Dynamic Bergstrom-Boyce model (DBB)
17. Silberstein-Boyce-1 (SB1)
18. Silberstein-Boyce-2 (SB2)
19. Flow Element Networks (FEN) model
20. Responsive Elastomer Foam (REF) model
29. Three Network Viscoplastic (TNV) model

The most used models are marked in blue

PolyUMod Material Parameters

All PolyUMod material models use an initial 16 global parameters, and then the actual material parameters for the selected material model. The PolyUMod User’s Manual contains the details. Read Chapter 3 in the User’s Manual! (“C:\Program Files\PolymerFEM\PolyUMod\Documentation\PolyUMod_Manual.pdf”)

PolyUMod Hints

For most problems pick one of the material models highlighted in blue.
Always activate non-linear geometry in the FE program.
Allow the FE program to use additional attempts per iteration before cutting time.
Some problems benefit from using a numerical Jacobian (JAC=3) instead of the default closed-form approximation.
When using plane-stress or membrane elements you may need to set the global parameter TWOD_S.
For anisotropic materials, you may need to set the global parameter ORIENT.