#70 PLASTIC + MFRONT in CalculiX

[Rafał Brzegowy]

Hi,

Use of MFRONT material behaviour with CalculiX:

MFRONT + ELASTIC -> OK
but
MFRONT + ELASTIC + PLASTIC -> Error

PLASTIC command does not even have to be used.

The behaviour 'IsotropicLinearHardeningPlasticity' has thrown an AbaqusException : AbaqusInterfaceExceptions::throwUnMatchedNumberOfStateVariables : the number of internal state variables does not match. The behaviour 'IsotropicLinearHardeningPlasticity' requires 7 state variables, and 13 state variables were declared
The behaviour 'The behaviour 'The behaviour 'IsotropicLinearHardeningPlasticityIsotropicLinearHardeningPlasticityIsotropicLinearHardeningPlasticity' has thrown an AbaqusException : ' has thrown an AbaqusException : ' has thrown an AbaqusException : AbaqusInterfaceExceptions::throwUnMatchedNumberOfStateVariables : the number of internal state variables does not match. The behaviour 'IsotropicLinearHardeningPlasticity' requires 7 state variables, and 13 state variables were declaredAbaqusInterfaceExceptions::throwUnMatchedNumberOfStateVariables : the number of internal state variables does not match. The behaviour 'IsotropicLinearHardeningPlasticity' requires 7 state variables, and 13 state variables were declaredAbaqusInterfaceExceptions::throwUnMatchedNumberOfStateVariables : the number of internal state variables does not match. The behaviour 'IsotropicLinearHardeningPlasticity' requires 7 state variables, and 13 state variables were declared

Regards

[Helfer Thomas]

Hi Rafal,
After contacting Guido Dhondt, it seems that the definition of nstav is not the same between Abaqus and CalculiX:

• In Abaqus, nstatv is the number of state variables of the material
• In CalculiX, nstatv is the maximum number of state variables for all materials
  I consider it a bug in CalculiX. After discussion with Guido Dhondt, this shall be corrected in future versions of CalculiX. In the mean time, I can add a MFRONT_ABAQUS_NORUNTIMECHECKS flag to disable all check (number of material properties, state variables, KSTEP) in the current development version of MFront. Would you test it ?
  Regards,
  Thomas

[Rafał Brzegowy]

Hi Thomas,
Thank you for informing me.

Yes, I can test it.
RegardsRafal

W wtorek, 6 czerwca 2017, 11:30:46 CEST, Helfer Thomas thelfer@users.sf.net napisał(-a):

Hi Rafal,
After contacting Guido Dhondt, it seems that the definition of nstav is not the same between Abaqus and CalculiX:

• In Abaqus, nstatv is the number of state variables of the material
• In CalculiX, nstatv is the maximum number of state variables for all materials
  I consider it a bug in CalculiX. After discussion with Guido Dhondt, this shall be corrected in future versions of CalculiX. In the mean time, I can add a MFRONT_ABAQUS_NORUNTIMECHECKS flag to disable all check (number of material properties, state variables, KSTEP) in the current development version of MFront. Would you test it ?
  Regards,
  Thomas

[tickets:#70] PLASTIC + MFRONT in CalculiX

Status: accepted
Milestone: 3.0.2
Created: Thu Jun 01, 2017 09:09 AM UTC by Rafał Brzegowy
Last Updated: Thu Jun 01, 2017 12:47 PM UTC

Owner: nobody
Hi,

Use of MFRONT material behaviour with CalculiX:

MFRONT + ELASTIC -> OK
but
MFRONT + ELASTIC + PLASTIC -> Error

PLASTIC command does not even have to be used.

The behaviour 'IsotropicLinearHardeningPlasticity' has thrown an AbaqusException : AbaqusInterfaceExceptions::throwUnMatchedNumberOfStateVariables : the number of internal state variables does not match. The behaviour 'IsotropicLinearHardeningPlasticity' requires 7 state variables, and 13 state variables were declared
The behaviour 'The behaviour 'The behaviour 'IsotropicLinearHardeningPlasticityIsotropicLinearHardeningPlasticityIsotropicLinearHardeningPlasticity' has thrown an AbaqusException : ' has thrown an AbaqusException : ' has thrown an AbaqusException : AbaqusInterfaceExceptions::throwUnMatchedNumberOfStateVariables : the number of internal state variables does not match. The behaviour 'IsotropicLinearHardeningPlasticity' requires 7 state variables, and 13 state variables were declaredAbaqusInterfaceExceptions::throwUnMatchedNumberOfStateVariables : the number of internal state variables does not match. The behaviour 'IsotropicLinearHardeningPlasticity' requires 7 state variables, and 13 state variables were declaredAbaqusInterfaceExceptions::throwUnMatchedNumberOfStateVariables : the number of internal state variables does not match. The behaviour 'IsotropicLinearHardeningPlasticity' requires 7 state variables, and 13 state variables were declared

Regards

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