Downloaded from https://www.everyspec.com APPENDIX C MIL-STD-31000A C.7.2.11. Embedded surfaces (G-SU-EM). Description: A set of completely overlapping surfaces of any type. Within precision of 0.01 mm, the logical value is true if there is no embedded surface. Effects of condition on CAD data quality: Design and drafting: Errors may occur when selecting surfaces. Solid model topology may fail. Redundant surfaces consume excess storage. Data exchange: Solid models may fail to sew after translation. Finite element analysis: Gaps may occur between mesh elements Numerically controlled manufacturing: Tool-path generation algorithms may produce excessive or insufficient cuts.
Recommended correction: Delete the redundant embedded surface. C.7.2.12. Excessively high-degree surface (G-SU-HD) Definition: Polynomial surface is of excessively high degree. Effects of condition on CAD data quality: Design and drafting: High-degree surfaces are susceptible to unwanted undulations and unpredictable behavior when small changes are made. Data exchange: The receiving system may be incapable of interpreting the high degree surfaces. Translators may fragment the surfaces (G-SU-FG). Finite element analysis: Automatic mesh generation may fail because software can’t recognize high degree surfaces. Fragmented surfaces may produce excessively fine mesh elements. 98