2000 International Solid Freeform Fabrication Symposium
Proceedings for the 2000 International Solid Freeform Fabrication Symposium. For more information about the symposium, please see the Solid Freeform Fabrication website .
The Eleventh Solid Freeform Fabrication (SFF) Symposium, held at The University of Texas in Austin on August 8-10, 2000, was attended by over 100 national and international researchers. Papers addressed SFF issues in computer software, machine design, materials synthesis and processing, and integrated manufacturing. New sessions on ceramic materials and multiple materials SFF were added to this year’s program. The diverse domestic and foreign attendees included industrial users, SFF machine manufacturers, university researchers and representatives from the government. The Symposium organizers look forward to its being a continuing forum for technical exchange among the expanding body of researchers involved in SFF.
The Symposium was again organized in a manner to allow the multi-disciplinary nature of the SFF research to be presented coherently, with various sessions emphasizing computer issues, machine topics, and the variety of materials aspects of SFF. We believe that documenting the changing state of SFF art as represented by these Proceedings will serve both the people presently involved in this fruitful technical area as well as new researchers and users entering the field.
The editors would like to extend a warm “Thank You” to Rosalie Foster for her detailed handling of the logistics of the meeting and the Proceedings, as well as her excellent performance as registrar and problem solver during the meeting. We would like to thank the Organizing Committee, the session chairs, the attendees for their enthusiastic contributions, and the speakers both for their significant contribution to the meeting and for the relatively prompt delivery of the manuscripts comprising this volume. We look forward to the continued close cooperation of the SFF community in organizing the Symposium. We also want to thank the Office of Naval Research (N00014-00-1-0674) and the National Science Foundation (DMI-0003777) for supporting this meeting financially. The meeting was co-organized by the University of Connecticut at Storrs, and the Mechanical Engineering Department, Laboratory for Freeform Fabrication and the Texas Materials Institute at The University of Texas at Austin.
Recent Submissions
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Tool Path Generation for Flexible Blade Cutting
(2000)Free Form Thick Layered Object Manufacturing FF-TLOM is based on application of a reshapeable cutting device, which allows a free form shaping of thick polystyrene foam layers. Once manufactured, these layers are stacked ... -
Visualization Tools for Design Support in SFF 437
(2000)When considering the use of SFF, there are many questions a designer might ask. What model orientation should be used, will the model have adequate aesthetic and functional properties, is the STL file suitable for transfer ... -
Designing and Slicing Heterogeneous Components for Rapid Prototyping 428
(2000)Many rapid prototyping techniques have the potential for fabricating components whose composition is non-uniform and varies in a desired fashion. A shape and composition modeling technique was developed to enable the ... -
Reasoning Boolean Operation for Modeling, Simulation and Fabrication of Heterogeneous Objects 417
(2000)An approach using reasoning Boolean operation to model heterogeneous object is presented. Algorithm in the reasoning Boolean operation consists of merging and extraction operation. This algorithm models heterogeneous object ... -
Model-Based Control of Cure Distribution in Polymer Composite Parts Made by Laminated Object Fabrication (LOF) 409
(2000)A mathematical heat transfer model was used to investigate process control strategies for making thermoset polymer composite materials by Laminated Object Fabrication (LOF). The temperature of the laminator was manipulated ... -
A New Feature in an Extrusion Based LM Process – Adaptive Roadwidth 399
(2000)For extrusion based LM processes, a computational based adaptive roadwidth algorithm have been developed which further reduces (if not eliminate) all voids and defects. Toolpath equations are written in terms of roadwidth, ... -
Finite Element Analysis of the SALDVI Process 393
(2000)Selective Area Laser Deposition Vapor Infiltration (SALDVI) is a developing solid freeform fabrication (SFF) technique aimed at the direct fabrication of ceramic and ceramic/metal structures and composites. SALDVI uses a ... -
Numerical Simulation of Bi-Materials Laser Densification 386
(2000)The dominant procedure currently used for permanent fixed prosthodontics is porcelainfused-to-metal (PFM) restoration that is a time consuming and labor intensive process. To address these shortcomings, this project will ... -
The Simulation of the SLS Process as the Basis of a Process Optimization 377
(2000)In this work, a new model of the SLS process is introduced, offering the chance of analytically optimizing Selective Laser Sintering. The laser energy input is calculated by considering multiple scattering in the powder ... -
Variable Polarity GTAW in Rapid Prototyping of Aluminum Parts 369
(2000)This paper reports on a process to build aluminum alloy parts by variable polarity gas tungsten arc welding (GTAW). The relationship between the geometric sizes of the deposited layer and the welding parameters is investigated. ... -
Development of A Precision Rapid Metal Forming Process 362
(2000)This paper presents the important issues pertaining to the development of a precision rapid metal forming process. A five-axis configuration provides a flexible building capability to produce free-form fabrication capability. ... -
Functionally Gradient Material Representation by Volumetric Multi-Texturing for Solid Freeform Fabrication 350
(2000)In order to fabricate parts from Functionally Gradient Materials (FGM) by layered manufacturing methods, the SFF community needs a method to represent material distributions in solid models. Gradient material distribution ... -
Study on Water Deposit in Rapid Freeze Prototyping Process 342
(2000)Rapid Freeze Prototyping (RFP) builds a three-dimensional ice part according to its CAD model by depositing and rapidly freezing water in a layer-by-layer manner. To study the water deposit in RFP, assumptions are made ... -
Slot-Coating for Rapid Manufacturing of Fibre-Reinforced Parts 333
(2000)Mechanical properties of parts manufactured through photolithography process are improved through the addition of short glass fibres. A lithography-based prototyping system for the manufacture of such composite parts has ... -
Layer Manufacturing of Heat Exchange Elements using Photochemical Machining with Diffusion Brazing 325
(2000)A number of heat exchanger elements for a Stirling engine were designed but found to be very difficult to manufacture using conventional technology. Each element required 1800 <1mm oval holes through a 70 mm length of the ... -
Embedding of Fiber Optic Sensors in Layered Manufacturing 314
(2000)Layered manufacturing enables integrating sensors during production of tooling or structural components. Sensors may be placed close to the points of interest prior to enclosure. Structures with embedded sensors are capable ... -
Accuracy Effects of Shelling a Part in the SLS Process 306
(2000)In order to reduce SLS process time in the manufacture of a mould insert, the idea of shelling the geometry of the insert has been tested. Some shelling strategies have been successful with the RapidToolTM process, proving ... -
Inhomogeneous Shrinkage of Polymer Materials in Selective Laser Sintering 298
(2000)It is well known that the laser beam of an SLS machine can be controlled almost exactly. The inaccuracy of the mechanical movements of the machines is also much lower than the actual errors of the SLS parts. How can we ... -
Five-Axis Freeform Fabrication of Solid Thermoplastic Parts via SWIFT 289
(2000)Current Rapid Prototyping (RP) & Layered Manufacturing (LM) techniques are based on controlled, precise additive manufacturing methods. These techniques suffer from problems associated with stair stepping, loss of accuracy ...