1,159 research outputs found
Digital fabrication of multi-material biomedical objects
This paper describes a multi-material virtual prototyping (MMVP) system for modelling and digital fabrication of discrete and functionally graded multi-material objects for biomedical applications. The MMVP system consists of a DMMVP module, an FGMVP module and a virtual reality (VR) simulation module. The DMMVP module is used to model discrete multi-material (DMM) objects, while the FGMVP module is for functionally graded multi-material (FGM) objects. The VR simulation module integrates these two modules to perform digital fabrication of multi-material objects, which can be subsequently visualized and analysed in a virtual environment to optimize MMLM processes for fabrication of product prototypes. Using the MMVP system, two biomedical objects, including a DMM human spine and an FGM intervertebral disc spacer are modelled and digitally fabricated for visualization and analysis in a VR environment. These studies show that the MMVP system is a practical tool for modelling, visualization, and subsequent fabrication of biomedical objects of discrete and functionally graded multi-materials for biomedical applications. The system may be adapted to control MMLM machines with appropriate hardware for physical fabrication of biomedical objects.postprin
The characteristics of the CAT to CAD to rapid prototyping system
ThesisComputer Aided Design (CAD), Rapid Prototyping (RP) and Computer Aided Tomography (CAT)
technologies were researched. The project entails a unique combination of the abovementioned
technologies, which had to be mastered by the author, on local and international terms.
Nine software packages were evaluated to determine the modus operandi, required input and final
output results. Fifty Rapid Prototyping systems were investigated to determine the strong and weak
areas of the various systems, which showed that prototype materials, machine cost and growing
time play an essential role. Thirty Reverse Engineering systems were also researched. Six different
RE methods were recorded with several commercial systems available. Nineteen case studies were
completed by using several different Computer Aided Tomography (CAT) and Magnetic
Resonance Imaging (MRI) centers. Each scanning centre has different apparatus and is discussed in
detail in the various case studies.
The focus of this project is the data transfer of two dimensional CAT scanning data to threedimensional
prototypes by using Reverse Engineering (RE) and Rapid Prototyping (RP). It is
therefore of cardinal importance that one is familiar and understands the various fields of interest
namely Reverse Engineering, Computer Aided Tomography and Rapid Prototyping. Each of these
fields will be discussed in detail, with the latest developments in these fields covered as well. Case
studies and research performed in the medical field should gain the medical industry's confidence.
Constant marketing and publications will ensure that the technology is applied and transferred to the
industry. Commercialisation of the technology is of utmost importanc
- …