Reply To: Creep analysis – Linear and Quadratic mesh

[Giorgos Papa]

Hello,

 

When deciding whether to use linear or quadratic mesh for a creep analysis, it's important to consider the specific requirements of your analysis.

According to the Ansys documentation, in nonlinear structural analyses, which would include creep analysis, you will usually obtain better accuracy at less expense if you use a fine mesh of linear elements rather than a comparable coarse mesh of quadratic elements.

URL:  https://ansyshelp.ansys.com/Views/Secured/corp/v232/en/ans_mod/Hlp_G_MOD2_4.html.

 

However, quadratic elements are recommended when Tetrahedral elements are meshing solid bodies or for shell elements on surface bodies with curved edges.

Ultimately, the choice between linear and quadratic elements should be based on the geometry of the model, the type of analysis, and the desired accuracy.

For a creep analysis, if the geometry is not excessively curved and a high level of accuracy is required, a fine mesh of linear elements might be more cost-effective.

If the geometry has significant curvature, quadratic elements might be more suitable to capture the curvature accurately.

On your analysis, where the number of elements on both models is the same, quadratic mesh is expected to yield more accurate results.

Then, performing a mesh sensitivity analysis is recommended to determine a satisfying level of accuracy for your application.

 

Kind Regards,

Giorgos