ABQ017

Abaqus: Nonlinear, rate dependent model (Bergstrom-Boyce model)

Description
This test program is recommended for modeling nonlinear viscoelastic response of rubbers and other polymers.

Abaqus Keywords
*HYPERELASTIC
*HYSTERESIS

Test Program
We recommend the following base tests:

Test ID

Description

# Rates

# Repeats

# Tests

UT004

Load/hold tensile test

2

2

4

Depending on the complexity of loading or deformation, we may recommend the following additional tests:

Test ID

Description

# Rates

# Repeats

# Specimens

PT004

Load/hold planar tension test

2

2

4

UC004

Load/hold compression test

2

2

4

VC004

Load/hold volumetric compression test

2

2

4

Notes

  • Testing at 2 or more rates is recommended to capture the nonlinear behavior of the material.
  • These tests are performed at room temperature.  For other temperatures see ABQ013.
  • UC004 may provide non-homogenous stress/strain data.  Inverse calibration procedures may be necessary.
  • Veryst will provide a calibrated material model (either a built-in Abaqus or PolyUMod® 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

  • 6 tensile (dog-bone) specimens
  • 6 planar tension specimens
  • 6 compression cylinder specimens
  • 6 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 (ABQ017), type of material, test temperatures, specimen geometries available, or other relevant details.

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