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Could you use these models as a preconditioner in an iterative solver?


I don't see any reason its not theoretically possible but I doubt it would be that beneficial.

You'd have to map the results back onto the traditional model which has overhead; and using shaky results as a precondition is going to negate a lot of the benefits, especially if its (incorrectly) predicting the part is already in the non-linear stress range which I've seen before. Force balances are all over the place as well (if they even bother to predict them at all, which its not always clear) so it could even be starting from a very unstable point.

Its relatively trivial to just use the native solution from a linear solution as the starting point instead, which is basically what is done anyway with auto time stepping.




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