New Orleans, Louisiana
June 26, 2016
June 26, 2016
August 28, 2016
Engineering Design Graphics
Direct modeling is an intuitive approach to creating parts and assemblies without the burden of history-based dependencies. Users can directly edit model geometry using everyday software methods such as “copy/paste” and “drag/drop” without needing to know how the geometry was originally created. Direct modeling creates geometry rather than features so it perfect for conceptual modeling where the designer doesn’t want to be tied down with the inter-dependencies of features and the ramifications making a change might have. The direct modeling approach simplifies design, so pre-planning a modeling strategy is not necessary as compared to history-based modeling. With direct modeling, designers can work within the most common modeling concepts. Similar to the history based modeling, the designer can create a 2D profile and then develop the model using commands like extrude, revolve, etc.
The advent of direct modeling will undoubtedly have a notable impact on the approach to teaching CAD in the undergraduate curriculum. Similar to the shift from 2D drafting to 3D solids, this new approach represents a paradigm shift in the CAD environment. In this paper, we will present the different approaches to direct modeling currently used by the leading CAD vendors and investigate the ramifications of changes in methods used to create and modify geometries, as well as differences in downstream uses for these new models.
Ault, H. K., & Phillips, A. D. (2016, June), New Directions in Solid Modeling - What Direct Modeling Means for CAD Educators Paper presented at 2016 ASEE Annual Conference & Exposition, New Orleans, Louisiana. 10.18260/p.25787
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