NDmaterialCommand: Difference between revisions

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{{Sensitivity_Command_Manual}}
{{Sensitivity_Command_Manual}}
{|
| style="background:yellow; color:black; width:800px" | '''nDMaterial matType? arg1? ...'''
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:: Currently, only one multi-axial material model has been extended for DDM-based FE response sensitivity computation.  
:: Currently, only one multi-axial material model has been extended for DDM-based FE response sensitivity computation.  

Latest revision as of 05:00, 13 March 2011





nDMaterial matType? arg1? ...
Currently, only one multi-axial material model has been extended for DDM-based FE response sensitivity computation.
MultiYieldSurfaceClay
The ‘MultiYieldSurfaceClay’ is an elastic-plastic material in which plasticity exhibits only in the deviatoric stress-strain response. The volumetric stress-strain response is linear-elastic and is independent of the deviatoric response. This material is implemented to simulate monotonic or cyclic response of materials whose shear behavior is pressure independent. Such materials include, for example, organic soils or clay under fast (undrained) loading conditions.
This material is available for sensitivity computation in both 2-D and 3-D models. It is another version of PressureIndependMultiYield material. However there are three differences between this model and PressureIndependMultiYield:
1. This model uses the consistent tangent modulus instead of the continuum tangent modulus.
2. This model does not support the ‘updateMaterialStage’ command.
3. This model does not support further discretization of the strain increment in each iteration.