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| MIL-STD-31000A - DOD Standard Practice Technical Data Packages | Reference | 2013 |
| An annotation orientation refers to the plane or the parallel plane in which the annotation lies, the viewing direction and the right direction or text rotation. One should maintain text orientation in a view that provides consistency for viewing. The orientation of the annotation plane should be maintained relative to the model geometry as the model is manipulated in 3D to comply with ASME Y14.41 section 5.2.3. |
| Is prepared by a commercial design activity, in accordance with that activity's documentation standards and practices, to support the development and manufacture of a commercially developed product. |
| Use of computer software to control and manage manufacturing processes, such as automatically coordinated operations of conveyor systems, cutting and forming machines, and riveting and welding machines. |
| Viewing of 3D models for design reviews, cost estimating by suppliers, and other applications in which the fidelity of appearance but not a high degree of manufacturing accuracy are required. Once data has been translated to a form for visualization, it should no longer be used for manufacturing. Visualization formats include 3D PDF, Siemens PLM Software JT, Parametric Technologys Pro/View and Creo Visualization, and Autodesks DWF. Models used for visualization must look right and the annotations associated with them must be accurate. Visualization models are subject to the least stringent validation criteria because it will not be used for manufacturing or engineering changes. |
| A numerical technique for finding approximate solutions to systems of partial differential equations. FEM is applied to calculations of stress, strain, and deflection, temperature distribution and heat transfer, electromagnetic and similar problems. FEM, also called finite element analysis (FEA), is characterized by the subdivision of solid objects into tetrahedral or hexahedral finite elements. Thin-walled objects may be approximated by two-dimensional shell elements having three or four sides. |
| Geometry consists of the mathematical description of individual part surfaces. Modern CAD systems employ what is called the boundary representation method for describing model geometry. Boundary representations consist of curves, surfaces, edges, and faces. In a valid model, the faces meet at the edges to form a closed volume. |
| Lifecycle Data consist of information that describes the state of the part within a controlled procedure for development, review, release for manufacture, retention for maintenance and upgrades, and retirement and disposal. For example, the revision level and release date are lifecycle data that describe the administrative state of the part and change as the product moves through its review and approval cycle. Lifecycle data dont describe properties inherent in the part (such as the material type or manufacturer) that are necessary information to make or procure the part. |  |
| A 3D model in the (usually proprietary) format of the CAD system in which it was originally derived or modeled. |
| A mathematical representation of a flat or curved bounded space having length and width but no thickness. A surface may consist of multiple surface patches adjacent on all internal edges. |
