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ABQ012 – Abaqus:

Nonlinear visco-hyperelastic model with stress softening


Description

This Test Program is recommended for modeling the nonlinear viscoelastic response of rubbers and other polymers that also exhibit stress softening, also known as Mullins effect.

Abaqus Keywords

* HYPERELASTIC

* MULLINS EFFECT

* VISCOELASTIC, NONLINEAR

Test Program

We recommend the following base tests:

Test ID Description # Rates # Repeats # Specimens

UT003

Tensile test

1

1

2

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

PT003

Planar tension test

1

2

2

PT004

Load/hold planar tension test

2

2

4

UC003

Compression test

1

2

2

UC004

Load/hold compression test

2

2

4

VC003

Volumetric compression test

1

2

2

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 ABQ014.

  • UC003 and UC004 may provide non-homogenous stress/strain data. Inverse calibration procedures may be necessary.

  • VC003 and VC004 are not needed for an incompressible material.

  • 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

  • 10 tensile (dog-bone) specimens

  • 10 planar tension specimens

  • 10 compression cylinder specimens

  • 10 volumetric compression specimens

See 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 click the button below and indicate the Test Program ID ABQ012, type of material, test temperatures and any other details (specimen geometries available, other unique constraints, etc.)

 


 


 

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