Finite Element Analysis is a computational method for solving field problems in various engineering disciplines. It involves discretizing a complex structure into smaller, more manageable parts called finite elements. The accuracy and efficiency of FEA largely depend on the quality of the mesh generated from these elements.
The top surface of a model in FEA can be particularly important depending on the type of analysis and the loading conditions. For instance:
Summary: The "Ansys Solidsquad" release provides functional access to high-end simulation tools for those who cannot afford a license, allowing hobbyists or learners to familiarize themselves with the interface.
However, the cons vastly outweigh the pros:
Recommendation: If you are a student, download the Ansys Student Version (Free). It is fully legal, stable, and supports up to a certain number of nodes/elements, which is more than enough for learning and university projects. If you are a professional, the cost of a license is insignificant compared to the cost of a security breach or a lawsuit.
First, a critical clarification: "SolidSquad TOP" is not an official Ansys product name. It is a high-level engineering jargon referring to the intelligent combination of the SOLID45/SOLID185 (or similar) element types with the SOLIDSQUAD command, executed from the TOP level of the APDL command hierarchy.
Ansys has attempted to automate this with the "Multizone" and "Hex-dominant" methods, but for true topological flexibility, the manual SolidSquad TOP sequence remains unmatched. Save the command snippet above as a .mac file (macro) in your Ansys working directory. Name it SSQUAD.mac. Next time you have a messy CAD import, simply type SSQUAD in the command line and watch your mediocre tet mesh transform into a hybrid powerhouse.
Have you used the SOLIDSQUAD command successfully? Share your experience with the "TOP" level approach in the FEA community forums.
About the Author: This guide was compiled for advanced Ansys users seeking to push beyond standard meshing limitations. Always verify hybrid shell-solid models against classic test cases before deployment.
Using SOLIDSQUAD,...,TOP only converts the outermost visible faces. Using ALL attempts to convert internal faces, which leads to element death and "zero volume" warnings. Always use TOP unless you are modeling a foam or lattice structure.