Discussion Overview
The discussion revolves around performing static structural analysis on a solid sphere using Ansys Workbench, specifically addressing the challenges of applying boundary conditions and constraints in the absence of contacts.
Discussion Character
- Technical explanation, Homework-related, Debate/contested
Main Points Raised
- One participant inquires about conducting static structural analysis on a solid sphere without specific boundary conditions or constraints.
- Another participant explains that without constraints, the global stiffness matrix becomes singular, suggesting that constraints should be applied to the center point and neighboring nodes to achieve a non-singular matrix.
- A subsequent post raises the idea of analyzing only the symmetrical part of the sphere to simplify the problem, questioning if this is an appropriate approach.
- Another participant confirms that working with half of the sphere is valid as long as the load is symmetrical, emphasizing the need to apply constraints to nodes on the plane of symmetry to restrict translations.
- A later reply indicates that the suggested approach worked for the original poster.
Areas of Agreement / Disagreement
Participants generally agree on the necessity of applying constraints to achieve a valid analysis, but there are varying opinions on the best method to apply these constraints, particularly regarding symmetry and the treatment of the sphere.
Contextual Notes
Limitations include the lack of specific boundary conditions and the dependence on the assumption of symmetry in the load distribution.
Who May Find This Useful
Individuals interested in structural analysis, particularly those using Ansys Workbench for similar problems involving symmetrical geometries.