I'm trying to build a model in Abaqus to simulate a three-point bending test. My goal is to compare a simulated force-displacement curve with experimental data in order to retrieve some key properties (e.g., Young's modulus, Yield Stress and Ultimate Stress) of novel aluminum alloys.
It is reasonable to model the plasticity of this material in this case by using the Ramberg-Osgood law? If so, is there any way to also incorporate the Poisson's Ratio?
The convenience of using the R-O relationship depends on the type of aluminium alloy, with specific reference to the slope of the nonlinear portion of the load over displacement diagram [Aluminium Alloy Structures, Second Edition, Federico Mazzolani]. May I ask why would you be interested in incorporating the Poisson's ratio?
The idea is to use experimental force-displacement data to estimate some key material properties, such as Young's Modulus or Yield Stress. I asked specifically for the Poisson's Ratio because R-O law do not include this quantity.
The R-O model does not include Poisson's ratio is true for the uni-axial loading, while for three-dimensional problems the extension of R-O model incorporates the Poisson's ratio.
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