Solid modeling and algorithms for heterogeneous objects
Solid modeling and algorithms for heterogeneous objects
Heterogeneous material modeling with distance fields
Computer Aided Geometric Design
Computer-aided design of heterogeneous objects
Computer-aided design of heterogeneous objects
Multi-material virtual prototyping for product development and biomedical engineering
Computers in Industry
A multi-material virtual prototyping system for biomedical applications
VECIMS'09 Proceedings of the 2009 IEEE international conference on Virtual Environments, Human-Computer Interfaces and Measurement Systems
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This paper presents an approach based on topological hierarchy to representation and subsequent fabrication of functionally graded multi-material (FGM) objects by layered manufacturing. The approach represents an FGM object by material control functions and discretisation of slice contours. Based on the topological hierarchy of slice contours, material control functions are associated with contour families of some representative layers across the X-Y plane and along the Z-plane. The material composition at any location is calculated from the control functions, and the slice contours are discretised into sub-regions of constant material composition. The discretisation resolution can be varied to suit display and fabrication requirements. In comparison with pixel- or voxel-based representation schemes, this approach is computationally efficient, requires little memory, and facilitates fabrication of large and complex objects, which can be assemblies of FGM and discrete materials. The proposed approach has been incorporated with a virtual prototyping system to provide a practical and effective tool for processing FGM objects.