E5004

• In a static stress analysis, the model is not statically stable, because either a constraint or contact is missing.
• In a thermal analysis, contact is missing that bonds the parts together.
• The Mesh is distorted, either because it is too large or because the CAD geometry leads to distorted elements.
• The parts have interference, and the contact distorts the mesh when the analysis removes the interference.
• The material properties are wrong or have a wide range in stiffness between parts.

• Check that the appropriate parts are constrained.
• Increase the contact tolerance or model the components differently.
• Check for small features that are causing the elements to distort and consider suppressing those features or modelling them differently.
• Use the “Inspect > Analyze Interferences” to detect and remove interferences.
• Check the material properties to confirm they are realistic.

Cause 2: Your model is missing a constraint or a contact, causing it to be statically unstable.