Computer aided design systems are routinely used by designers for creating part geometries. Interfaces to computer aided analysis and manufacturing are also commonplace enabling the rapid fabrication of the designed part. Thus far, however, the focus was on objects with homogeneous interior. Two recent advances use of functionally graded materials in parts, and layered manufacturing technology have brought to the forefront the need for CAD systems to support the creation of geometry as well as the graded material inside. This paper reports on such a system. We describe the need, the components and implementation of a CAD system for creating heterogeneous objects. Two examples illustrate the use.
Bhashyam, S., Hoon Shin, K. and Dutta, D. (2000), "An integrated CAD system for design of heterogeneous objects", Rapid Prototyping Journal, Vol. 6 No. 2, pp. 119-135. https://doi.org/10.1108/13552540010323547
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