Background
Like last year, we're are working to expand the functionality of several of our current solvers as well as adding new functionality. Last year this included the ability to run large deflection analyses within 3D in addition to the functionality that has existed in Midplane for several years.
This year we've expanded that to also include a buckling analysis. For years this capability has been restricted to Midplane meshed models and was run to determine structural integrity of a model and the stress generated during the injection molding process. Based on those results you could determine the best deflection model to use, the default small deflection or large deflection if the part did in fact buckle.
Process
1.) Configure analysis via standard procedure (import model, mesh, define material, etc.)
2.) In the process settings navigate to the warpage tab and disable mesh aggregation
3.) Open the advanced options for warp
4.) Change the warp model to buckling
5.) Define any desired solver parameters (number of eigenvalues and convergence requirements)
6.) Finish process settings
7.) Launch analysis
Reviewing Results
The primary result to review is the eigenvalue calculation within the log file. It's representative of the percentage of stress required to cause the part to buckle. Once the eigenvalues exceed 1.4, that is indicative of a part that requires more than 140% to buckle. In these cases the small deflection analysis is sufficient. That said, eigenvalues less than 1.4 require less stress to buckle and may be prone to that occurring. As such, it is recommended to run a large deflection for these cases.