Abaqus: PolyUMod® user material models
Description
This test program is recommended for modeling nonlinear viscoelastic rubbers and other polymers using a material model from the PolyUMod library (originally developed by Veryst and now available on PolymerFEM.com).
Abaqus Keywords
* USER MATERIAL
Test Program
We recommend the following base tests:
|
Test ID |
Description |
# Temps |
# Rates |
# Repeats |
# Specimens |
|---|---|---|---|---|---|
|
3 |
2 |
2 |
1 |
Depending on the complexity of loading or deformation, we may recommend the following additional tests:
|
Test ID |
Description |
# Temps |
# Rates |
# Repeats |
# Specimens |
|---|---|---|---|---|---|
|
3 |
2 |
2 |
12 |
||
|
3 |
2 |
2 |
12 |
||
|
3 |
2 |
2 |
12 |
Notes
- Testing at 2 or more rates is recommended to capture the nonlinear behavior of the material.
- Suggested testing at 3 temperatures may be revised depending on the range of temperatures of interest and the material.
- UC004 may provide non-homogeneous stress/strain data. Inverse calibration procedures may be necessary.
- VC004 is not needed for an incompressible material.
- Veryst will provide a calibrated PolyUMod material model for the observed response and the material.
- The resulting set of parameters can be used directly in Abaqus CAE or the input file.
Specimen Requirements
- 16 tensile (dog-bone) specimens
- 16 planar tension specimens
- 16 compression cylinder specimens
- 16 volumetric compression specimens
See the description of individual tests for details on specimen geometries. Note that we request extra specimens to ensure a sufficient supply of specimens for valid testing.
Veryst can also assist in molding standard and non-standard test specimens. Please contact us if you are interested in discussing this option.
Additional Validation
Veryst can perform additional validation, depending on the target material and the simulation application, through any of the following tests and any necessary component level FE simulation:
- Impact testing
- Micro-to-macro indentation responses
- Cyclic tests with loading/unloading between different strain levels and zero stress level at different rates
More information
For a customized quotation, please write to us at testing@veryst.com and indicate the Test ID (ABQ101), type of material, test temperatures, specimen geometries available, or other relevant details.