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  1. vanji

    Nonlinear static -- theoretical formulation

    Hello I would like to know what is the nonlinear formulation for nastran sol 106? Logically, in statics you should have Kij Uj + Kij UjUk + Kijkl UjUkUl=Fi It seems not to work correctly when using shell elements... Is the formulation taken correct or is there a parameter to adjust in the...

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