ND material
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.. module:: xc
	    
.. autoclass:: NDMaterial
    :members:
    :show-inheritance:
	    
.. autoclass:: ElasticIsotropicMaterial
    :members:
    :show-inheritance:
	    
.. autoclass:: J2Plasticity
    :members:
    :show-inheritance:
	    
.. autoclass:: NDAdaptorMaterial
    :members:
    :show-inheritance: