Advantages of iterative FE when solving physically nonlinear problems:
- the iterative element will not take forces above the ultimate bearing capacity;
- iterative elements make it possible to take into account the unloading path of the material according to initial modulus of elasticity;
- in case of destruction, the accumulated forces that precede the stage of destruction are not fixed;
- in problems with time history analysis, there is no 'time delay', that is, problems in correspondence between accumulated efforts and displacements.