Downloaded from https://www.everyspec.com APPENDIX C MIL-STD-31000A Numerically controlled manufacturing: Non-manifold conditions produce structurally unsound bodies. Recommended correction: Revise shell faces to eliminate over used edges. C.7.6.9. Over-used vertex (G-SH-OU). Definition: A vertex is shared by too many edges. The criterion value is an integer, N, equal to the number of edges shared by any vertex. Effects of condition on CAD data quality: Design and drafting: Designers may intend that multiple edges meet at a common vertex. Too many edges meeting at a common vertex may be indicative of incorrect geometry Data exchange: Gaps or micro elements may occur. Finite element analysis:
Distorted elements may occur. Numerically controlled manufacturing: Milling operations may be difficult. Recommended correction: Review conditions visually and revise if necessary. C.7.7. Solid body criteria. C.7.7.1. Embedded solids (G-SO-EM). Description: Solid volumes completely surrounded by other solid volumes. The logical value of the criterion is true if no solids are embedded within other solids. 119