Keyword type: model definition, material
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:
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.
Repeat this line if needed to define complete temperature dependence.
- Young's modulus (E).
- Poisson's ratio ().
- Yield stress ()
- Exponent (n).
- Yield offset ().
defines a Ramberg-Osgood law. No temperature dependence is introduced.
Example files: beampl.