The behavior of a structure under applied loads is of utmost importance to engineers. Most engineering problems are non-linear from the beginning or they become non-linear at higher load levels. The nonlinear response could be due to different reasons e.g. material behavior, snap-through, buckling or contact with a neighboring body. The finite element analysis (FEA) is widely used for solving the engineering problems in solid and structural mechanics. Solving non-linear problems using FEA is a challenging task even for an experienced analyst.
Solving Non-Linear Problems
A structure could exhibit non-linear behavior in many different forms and there could be a number of different sources of non-linearity. Solving such problems could be baffling to a novice user. One of the most difficult decision facing an FEA analyst is to decide whether a non-linear analysis is really required for a given problem.