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*DEFORMATION PLASTICITY
Keyword type: model definition, material
This option defines the elastoplastic behavior of a material by means of the generalized RambergOsgood law. The onedimensional model takes the form:

(470) 
where is the logarithmic strain and the Cauchy stress. In the present implementation, the Eulerian strain is used, which is very similar to the logarithmic strain (about 1.3 % difference dat 20 % engineering strain). All coefficients may be temperature dependent.
First line:
Following line:
 Young's modulus (E).
 Poisson's ratio ().
 Yield stress ()
 Exponent (n).
 Yield offset ().
 Temperature.
Repeat this line if needed to define complete temperature dependence.
Example:
*DEFORMATION PLASTICITY
210000.,.3,800.,12.,0.4
defines a RambergOsgood law. No temperature dependence is introduced.
Example files: beampl.
guido dhondt
20181215