Test program for elastic-plastic modeling of thermoplastic materials with temperature dependence (no rate dependence)
Description
This test program is recommended for generating experimental data useful for modeling the rate-independent elastic-plastic behavior of a thermoplastic material over a range of temperatures.
Test Program
We recommend the following base tests:
| Test ID | Description | # Temps | # Repeats | # Specimens |
|---|---|---|---|---|
| UT001 – RT/HT/CT | Tensile test – cryo, room or high temperature | 3 | 2 | 6 |
| UC001 – RT/HT/CT | Compression test – cryo, room or high temperature | 3 | 2 | 6 |
Depending on the material, we may also recommend the following additional tests:
| Test ID | Description | # Repeats | # Specimens |
|---|---|---|---|
| VC001 | Volumetric compression test | 2 | 2 |
Notes:
- Tests are performed for at least three temperatures spanning the range of interest (Room temperature (RT), High Temperature (HT) or Cryogenic Temperature (CT)). If the temperature range is sufficiently large, more temperatures may be recommended.
- VC001 is not needed for an incompressible material.
- The test program assumes the material is isotropic. If the material is anisotropic, Veryst recommends a different suite of tests. Write to us at testing@veryst.com for more information.
Specimen Requirements
- 9 tensile (dog-bone) specimens
- 9 compression cylinder specimens
- 3 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.
Material Model Calibration
Veryst can use the above test program to calibrate an appropriate elastic-plastic constitutive model for use in finite element simulations. Veryst can calibrate models built-in to commercial finite element (FE) codes (Abaqus, ANSYS, COMSOL Multiphysics, LS-DYNA, etc.) or advanced models from the PolyUMod® library, which may also be used with most commercial FE codes.
Typical candidate material models include advanced polymer viscoplasticity models [Bergstrom-Boyce, three-network model (TNM), parallel network model (PNM), parallel rheological flow (PRF), etc.] The specific model selected depends on the material behavior and your FE software.
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
More Information
For a customized quotation, please write to us at testing@veryst.com and indicate the Test ID (TP002), type of material, test temperatures, specimen geometries available, or other relevant details.