New Features in MCalibration 6.6.0

New Features

  • Improved how stress-strain predictions are stored in the mcal-file. The data is now stored in a more space efficient manner.
  • Added a new load case type called “Graph Data”. This load case type can be used to just plot experimental data.
  • Added one more pre-defined virtual load case type: 10 tensile load cycles with increasing strain amplitude.
  • Added support for the BAM hyperelastic material model in the PolyUMod PN model. This new model is EType=28.
  • Added an internal solver for the Abaqus PRF model with 2 Yeoh hyperelastic networks, Bergstrom-Boyce flow, and isotropic hardening plasticity. This model is called “Abaqus-PRF2YB-Plast” in MCalibration.
  • Added an internal solver for the Abaqus PRF model with 3 Yeoh hyperelastic networks, Power flow, and isotropic hardening plasticity. This model is called “Abaqus-PRF3YP-Plast” in MCalibration.
  • Added internal solver support for Abaqus linear elastic with creep.
  • Added internal solver support for Abaqus linear elastic with isotropic hardening plasticity and creep.
  • Added one more predefined file size to the image export dialog.
  • Added a fitness weight factor for load cases that do not finish.
  • The virtual load case dialog now includes an experimental data library. It currently contains experimental data for: PET, ABS, and natural rubber.
  • MCalibration now takes a field variable (which can be useful for analyzing material models that depend on, for example, humidity or moisture).
  • The internal solver can now calibrate both WLF and Arrhenius time-temperature-superpositioning parameters for all relevant Abaqus material models.

 

Software Improvements

  • Improved the GUI interface for the Abaqus elastic-plastic material model with isotropic hardening.
  • Can now specify that the number of pairs of stress-strain data should be determined from the experimental data.
  • Simplified how the stress and strain types are specified for a load case.
    Switched to Qt 6.2.3 for the GUI toolkit.
  • Improved how the MCalibration solver works with creep load cases.
  • Removed support for the M8 material model.
  • Improved the stability when reading in a mcal-file with issues.
  • Improved the stability of the internal solver for the Abaqus Johnson-Cook plasticity model.
  • Improved the Ansys elastic plastic with creep model.
  • Removed “+” from exported LS-DYNA k-files.
  • Load cases that use an Abaqus solver are now analyzed in separate subdirectories during calculations.
  • In most cases MCalibration now automatically uses hybrid elements when needed.
  • Cleaned up the material model selection dialog.

 

Bug Fixes

  • Fixed a bug in the Add Segment for a Virtual Load case dialog.
  • Fixed a bug for large strain shear in compression.
  • Fixed a bug in the save all calibration improvements to the model history function.
  • Fixed a bug in the Ansys MISO Creep model.
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Extended Tube Model in Ansys Mechanical

The Extended Tube model is one of the most accurate hyperelastic material models available, but it can be difficult to use if you don’t understand how the material parameters influence the predicted stress-strain response. This article will demonstrate that by example.

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