AFCO1D
This is an extension of ArmstrongFrederick1D
model.
The name represents the following.
AF
--- Armstrong-Frederick type kinematic hardening ruleCO
--- Chaboche-Ohno type isotropic hardening reduction rule
References
Theory
Compared to ArmstrongFrederick1D
, this AFCO1D
model further adopts the concept of a non-hardening plastic strain region. It is described by the following surface.
In which, points to the centre of the non-hardening plastic strain region. It may be called the back plastic strain. The field describes the size of this surface. It is further used to introduce a reduction term in the isotropic hardening.
Further details can be found in the corresponding section in Constitutive Modelling Cookbook.
Syntax
Examples
With a perfectly plastic response, the ArmstrongFrederick1D
presents a non-degrading envelop.
The cyclic response is the following.
By introducing the reduction, one can obtain the following.
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