Archives for FEA Theory

Non-linear FEA: Contact Stabilisation

When it comes to discussing non-linear capabilities, non-convergence error messages are the most common stumbling block.  A non-linearity, in other terms, a change in the stiffness matrix as the calculation is performed, can be due to yielding (plasticity), deformation of the structure (eg. tension on a fishing rod) or to a contact status change.  …