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A.M.M. Chan

Bio: A.M.M. Chan is an academic researcher from University of Hong Kong. The author has contributed to research in topics: Product design & New product development. The author has an hindex of 1, co-authored 1 publications receiving 177 citations.

Papers
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TL;DR: A virtual prototyping system that integrates virtual reality with rapid prototyping (RP) to create virtual or digital prototypes to facilitate product development and key control parameters of an RP process may be effectively tuned up for optimal fabrication of physical prototypes in subsequent product development.
Abstract: This paper describes a virtual prototyping (VP) system that integrates virtual reality with rapid prototyping (RP) to create virtual or digital prototypes to facilitate product development. The proposed VP system incorporates two new simulation methodologies, namely the dexel-based and the layer-based fabrication approaches, to simulate the powder-based and the laminated sheet-based RP processes, respectively. The dexel-based approach deposits arrays of solid strips to form a layer, while the layer-based approach directly forms a complete layer by extruding the slice contours. The layer is subsequently stacked up to fabricate a virtual prototype. The simulation approaches resemble the physical fabrication processes of most RP systems, and are therefore capable of accurately representing the geometrical characteristics of prototypes. In addition to numerical quantification of the simulation results, the system also provides stereoscopic visualisation of the product design and its prototype for detailed analyses. Indeed, the original product design may be superimposed on its virtual prototype, so that areas with dimensional errors beyond design limits may be clearly highlighted to facilitate point-to-point analysis of the surface texture and the dimensional accuracy of the prototype. Hence, the key control parameters of an RP process, such as part orientation, layer thickness and hatch space, may be effectively tuned up for optimal fabrication of physical prototypes in subsequent product development. Furthermore, the virtual prototypes can be transmitted via the Internet to customers to facilitate global manufacturing. As a result, both the lead-time and the product development costs can be significantly reduced.

182 citations


Cited by
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TL;DR: Augmented reality (AR) is a novel human-machine interaction that overlays virtual computer-generated information on a real world environment as discussed by the authors, which has found good potential applications in many fields, such as military training, surgery, entertainment, maintenance, assembly, product design and other manufacturing operations.
Abstract: Augmented reality (AR) is a novel human–machine interaction that overlays virtual computer-generated information on a real world environment. It has found good potential applications in many fields, such as military training, surgery, entertainment, maintenance, assembly, product design and other manufacturing operations in the last ten years. This paper provides a comprehensive survey of developed and demonstrated AR applications in manufacturing activities. The intention of this survey is to provide researchers, students, and engineers, who use or plan to use AR as a tool in manufacturing research, a useful insight on the state-of-the-art AR applications and developments.

304 citations

Journal ArticleDOI
TL;DR: A narrative review aims to evaluate the different streams of computer-aided manufacturing in prosthodontics and finds that the subtractive method may be more suitable for the production of intraoral prostheses where high occlusal forces are anticipated.
Abstract: In prosthodontics, conventional methods of fabrication of oral and facial prostheses have been considered the gold standard for many years. The development of computer-aided manufacturing and the medical application of this industrial technology have provided an alternative way of fabricating oral and facial prostheses. This narrative review aims to evaluate the different streams of computer-aided manufacturing in prosthodontics. To date, there are two streams: the subtractive and the additive approaches. The differences reside in the processing protocols, materials used, and their respective accuracy. In general, there is a tendency for the subtractive method to provide more homogeneous objects with acceptable accuracy that may be more suitable for the production of intraoral prostheses where high occlusal forces are anticipated. Additive manufacturing methods have the ability to produce large workpieces with significant surface variation and competitive accuracy. Such advantages make them ideal for the fabrication of facial prostheses.

238 citations

Journal ArticleDOI
TL;DR: In this paper, the authors describe a virtual prototyping system called the Construction Virtual Prototyping (CVP) system, which is developed for modeling, simulation, analysis and VP of construction processes from digital design.

171 citations

Journal ArticleDOI
TL;DR: In this paper, an energy and material consumption model of the Binder-Jetting (BJ) process is presented and validated by experimental data to provide LCI data for further Life Cycle Analysis (LCA) of BJ processes.

151 citations

Journal ArticleDOI
TL;DR: In this paper, the surface roughness of layered manufacturing (LM) processes is predicted in advance, and a roughness distribution expression for all surface angles is introduced using measured roughness data and interpolation.

150 citations