As a finite element analyst, to accurately predict the true behavior of a structure, you must have the right answers to these questions when modeling.

1- Material behavior: linear or nonlinear?
2- Displacements: small or large?
3- Rotations: small or large?
4- Direction of loads: are they changed due to deformation?
5- Contact between parts: where should it be and where should it not be defined?

Misconsidration of any of these leads to errors in the results and an accurate prediction of the behavior of the structure.

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