Physical problems include lots of different situations such as fluids, basic mechanics, slight deformations, large deformations, etc. So it is very important to select the proper meshing options according to your physics requirements. ANSYS® provides very extensive meshing options and capabilities upon these requirements. One of these options in ANSYS® Mechanical is Shape Checking options of meshing. In this article, we will show what is Nonlinear Mechanical options in Shape Checking in ANSYS® Mechanical meshing.
The default option for Shape Checking in ANSYS® Mechanical meshing is ‘Standard Mechanical’. You can select the ‘Nonlinear Mechanical’ according to your physics and FEA requirements.
As we stated in the Aggressive Mechanical article in Mechanical Base, it is a very restrictive Shape Checking option because it is using tighter Jacobian ratios at nodes. But in Nonlinear Mechanical, a product of the bounded Bézier Jacobian ratio and skewness for tetrahedral elements is used. This means it is much tighter compared to the Aggressive Mechanical option of Shape Checking.
It is possible to mesh failure in analyses and it will take longer times to obtain mesh and solutions with Nonlinear Mechanical. We recommend that you need to use this option in Nonlinear analyses or large deformation analyses in ANSYS® Mechanical.
It is also recommended to select the ‘Nonlinear Mechanical’ physics preference in ANSYS® Mechanical meshing if you select the ‘Nonlinear Mechanical’ for Shape Checking option as above.
Do not forget to leave your comments and questions below about the ‘Nonlinear Mechanical’ physics preference in ANSYS® Meshing.
NOTE: All the screenshots and images are used in education and informative purposes. Images used courtesy of ANSYS, Inc.