Downloaded from https://www.everyspec.com APPENDIX C MIL-STD-31000A C.7.1.3. Non-smooth curves or segments (G 2 discontinuity) (G-CU-NS). Definition: Radius of curvature changes at the common end point of two curves or a curve and a line segment. Measurement: ratio of the difference in radius of curvature over mean radius, |r1-r2|/(r1+r2)/2 Discontinuous curvature is a quality defect only if adjacent curves are required by designers to have continuous curvature. Design or drafting: A quality defect only when curvature continuity is required. Data exchange: No harmful effects on data exchange. Finite-element analysis: No harmful effects on mesh generation or model solution.
Numerically controlled manufacturing: Curvature discontinuity is visible in finished parts. No effect on machining operations. Recommended correction: Adjust one or both entities to eliminate the unwanted condition. C.7.1.4. Tiny Curve or segment (G-CU-TI). Definition: Curve or arc length is smaller than permissible minimum. Measurement: segment length or arc length in mm. 86