11/03/2014

Workbench - Mechanical Structural Nonlinearities

This appendix is intended for users who want to obtain a better understanding of element technology options used in structural nonlinear simulations.
With the variety of technologies available in many elements, choosing the best element formulation option to solve problems most efficiently can be challenging. 

Fortunately, Workbench Mechanical will automatically activate the best options based on the analysis challenges present in the model.

However, the analyst of nonlinear problems still has decisions to make.  For example, since large nonlinear models can be very challenging and computationally expensive, it is sometimes advantageous to drop element mid-side nodes.
Advantages to lower order elements:
Runtime Efficiency
Computational Stability 

Disadvantage to lower order elements:
Shear Locking with conventional, displacement based formulations in bending dominated problems.
To address this challenge, Simulation automatically enhances the lower order elements with a more robust technology.


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