Downloaded from https://www.everyspec.com APPENDIX C MIL-STD-31000A Effects of condition on CAD data quality: Design and drafting: Fragmented curves increase model size and are hard to control. Data exchange: The receiving system may be incapable of accepting the large number of segments. Finite element analysis: Large numbers of segments may produce excessively fine mesh elements. Numerically controlled manufacturing: Increases model size unnecessarily. Recommended correction: Replace the fragmented curve with one that consists of fewer segments. C.7.1.10. Wavy planar curve (G-CU-WV). Definition: Curvature changes direction excessively. Number of changes in curvature sign = N.
The condition may occur in planar or three-dimensional curves. Effects of condition on CAD data quality: Design and drafting: Undesirable appearance for most defense applications. Data exchange: No impact on data exchange. Finite element analysis: Undulations may produce excessive numbers of elements. Numerically controlled manufacturing: Undulations appear in the work piece. Recommended correction: Replace the wavy curve with one that has fewer undulations. 90