Abstract
Solid modelling is the most advanced technique available to the designer for generating a 3-D representation of an item on a CAD system. The solid model represents both the full surface geometry of the item and the interior volume bounded by the surface faces. Consequently, an unambiguous representation of an item can be generated using this technique. The Boolean operators allow ‘material’ simply to be added to, or subtracted from, the item currently modelled on the CAD system. Any new edges or surfaces created by a Boolean operation are calculated immediately by the modelling software and incorporated into the object model. Once an item has been solid modelled, its 3-D representation can be used to integrate the design activity with other CAE activities. The importance of this approach to 3-D modelling can be gauged by its increasing frequency of use in industry for a range of diverse engineering applications. Also the importance of the 2-D database as the basis of an integrated CAE system has declined in preference to the 3-D solid model database.
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