operators

Operator	Supported tensor orders	Vectorized	Example configuration
mechkit.operators.Sym(axes).__call__	any	no	axes=[0,1] symmetrizes the first two axes
mechkit.operators.Sym_Fourth_Order_Special(label).__call__	4	no	label=”major” takes the major symmetric part, supported labels are [“left”, “right”, “major”, “inner”, “complete”]
mechkit.operators.dev	2, 4	no	none

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class mechkit.operators.Abstract_Operator

check(tensor, *args, **kwargs)

Check whether tensor is not changed by operator. If the derived operator represents a symmtry, this method can be used to check, whether tensor is symmetric with respect to this operator.

class mechkit.operators.Sym(axes=None)

Based on the axes argument of the class initiation, the returned instance act as a symmetrization function, which symmetrices a given tensor with respect to the specified axes. If axes is None, all axes of the tensor are symmetrized

class mechkit.operators.Sym_Fourth_Order_Special(label=None)

Based on the label argument of the class initiation, the returned instance act as a symmetrization function, which symmetrices a given tensor with respect to the selected symmetry, following [10].

mechkit.operators.dev_tensor_2nd_order(tensor)

mechkit.operators.dev_tensor_4th_order_simple(tensor)

Simple formulation taking the deviatoric part of a fourth order tensor

mechkit.operators.dev(tensor, order=4)

Get deviatoric part of tensors: Wrapper for dev_tensor_2nd_order and dev_tensor_4th_order_simple

class mechkit.operators.Alternative_Deviator_Formulations

dev_t4_kanatani1984(tensor)

Formulation in [7] limited to tensors with trace of value one

dev_t4_spencer1970(tensor)

Formulation in [11]

dev_t4_boehlke2001(tensor)

Formulation in [3]. Appendix C, (C.1, C.2, C.3, C.4)