Question is on the meaning of input variable TID within material model 163 of LS-Dyna 971.
Definition of TID variable.
TID: Table ID defining yield stress versus volumetric strain at different strain rates.
Remark of TID: Rate effects are accounted for by defining a table of curves using *DEFINE_TABLE. Each curve defines the yield stress versus volumetric strain for a different strain rate. The yield stress is obtained by interpolating between the two curves that bound the strain rate.
What I understand of the yield stress is a single point on a stress vs volumetric strain curve for each individual strain rate. So wouldn't that give me a yield stress vs volumetric strain point for each individual strain rate.
Is the yield stress referring to just the stress. Having trouble understanding the inputs, any clarification would be helpful.