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This option defines the elasto-plastic behavior of a material by means of the generalized Ramberg-Osgood law. The one-dimensional model takes the form:
|  | (334) | 
 is the logarithmic strain and
 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.
 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:
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Example: *DEFORMATION PLASTICITY 210000.,.3,800.,12.,0.4
defines a Ramberg-Osgood law. No temperature dependence is introduced.
Example files: beampl.