I am working with a highly non-linear hyperelastic material. I have uniaxial tensile testing data that I have input and modeled using the Marlow model. The material model essentially appears as a bell curve with max stress at 0.16Mpa, at 0.304 strain. During the simulation, I am reaching strain levels that exceed the yield, and are on the "downslope" of the bell curve. I am attempting to figure out how to best model the material. Shown are deformed plots of an axisymmetric model where a load is placed on the left edge. When I use the material "as is" the final deformed shape is shown in "Full Material Model". When I applied a Mullins Effect damage model, the final deformed shape is shown in "Mullins Effect". Note now different just the physical shape appears. Also, the max stress level is considerably different also.
This leads to several questions:
1) Which method of damage is most accurate? Applying the damage model, or merely using the full material model. OR, would it be more accurate to use a plastic deformation definition somehow?
2) Which deformation is actually the correct deformed shape?
3) How does the damage model actually work? Does it eliminate the overly deformed elements or stress softening?
I am a little confused as to the best method to proceed with this simulation given the large differences in deformed shapes and stress levels. Thanks for any insight you may have.
This leads to several questions:
1) Which method of damage is most accurate? Applying the damage model, or merely using the full material model. OR, would it be more accurate to use a plastic deformation definition somehow?
2) Which deformation is actually the correct deformed shape?
3) How does the damage model actually work? Does it eliminate the overly deformed elements or stress softening?
I am a little confused as to the best method to proceed with this simulation given the large differences in deformed shapes and stress levels. Thanks for any insight you may have.