• A Theoretical Model for Optimization of SALD Parameters 

      Bzymek, Zbigniew M.; Shaw, Leon L.; Marks, Wojciech (1998)
      This paper addresses the need to conduct theoretical work concerning an economical way of Solid Freeform Fabrication rendering by using selective Area Laser Deposition (SALD). The part in SALD rendering process is formed ...
    • Surface Finishing of Selective Laser Sintering Parts with Robot 

      Shi, Dongping; Gibson, Ian (1998)
      Compared with conventional subtractive manufacturing technologies, RP has great benefits in shortening the design-manufacture cycle time of a product. Even ifmechanical properties are not considered, most RP products ...
    • Reverse Engineering Trimmed NURB Surfaces From Laser Scanned Data 

      Steinberg, Ben; Razdan, Anshuman; Farin, Gerald (1998)
      A common reverse engineering problem is to convert several hundred thousand points collected from the surface of an object via a digitizing process, into a coherent geometric model that is easily transferred to a CAD ...
    • A Process Planning Method and Data Format for Achieving Tolerances in Stereolithography 

      Lynn, Charity M.; West, Aaron; Rosen, David W. (1998)
      When building parts in a stereolithography apparatus (SLA), the user is faced with many decis!ons regarding the setting of process variables. To 'achieve a set of tolera~ces as closely as pOSSIble, relationships between ...
    • Solid Freeform Fabrication Research In Engineering Education 

      Crockett, R.S.; Gervasi, V.R. (1998)
      Because Solid Freeform Fabrication (SFF) has an extremely wide range of potential applications, crossing traditional engineering and science boundaries, it is a technology that lends itself to multi-disciplinary activities ...
    • Topology Driven Improvement of FDC Build Parameters 

      Jamalabad, Vikram R.; Chard, Jeffrey A.; Gasdaska, Charles J.; Clancy, Richard B. (1998)
      The likeliest failure origin for advanced ceramics parts, prepared by fused deposition, is a void from improper fill. Adequate filling of each cross-section is dependent upon the deposition toolpath. Cross-sectional spaces ...
    • Net Shape Fabrication of SiC and SiC/SiC Components Using Laminated Object Manufacturing (LaM): Overall Process Flowchart 

      Klosterman, Don; Chartoff, Richard; Osborne, Nora; Graves, George; Lightman, Allan; Bezeredi, Akos (1998)
    • Parametric Based Controller for Rapid Prototyping Applications 

      Fadel, Georges; Ganti, Ravi (1998)
      A methodology aiming at reproducing in Rapid Prototyping applications, exact parametric curves from CAD data is presented. The approach consists of converting the space-based parametric curves from the CAD system into ...
    • Stereometric Design for Desk-Top SFF Fabrication 

      Bzymek, Zbigniew M; Theis, Scott; Manzur, Tariq; Roychaudhuri, Chandra; Sun, Lianchao; L. Shaw, Leon (1998)
      Solid Freeform Fabrication (SFF) technologies refer to the fabrication of physical parts directly from computer based solid models described by STL (Stereo Lithography) or VRML (Virtual Reality Modeling Language) files ...
    • Processing of Bioceramic Implants Via Fused Deposition Process 

      Bose, Susmita; Avila, Marisol; Bandyopadhyay, Amit (1998)
      Porous ceramic structures have long been a subject of investigation as bone sl..bstitute. Most of these porous structures are typically made by techniques that result .randomly arranged pores with a wide variety of pore ...
    • 2D Wavelet Analysis of Solid Objects: Applications in Layered Manufacturing 

      Roosendaal, Mark D. Van; Chamberlain, Peter; Thomas, Charles (1998)
      In this paper, we introduce two-dimensional discrete wavelet basis functions and their application in the analysis and modeling ofsurface topography in layered manufacturing objects. In previous work, a one dimensional ...
    • Laser Polishing of Silica Rods 

      Wang, Hongyun; Bourell, David; Beaman, Joseph J. (1998)
      Lasers have been widely used in surface modification. In this research a CO2 continuous wave laser has been used to polish the slot surface of the silica rods. The strong absorption of the lO.6 um C02 radiation by the ...
    • Thermal-Expansion and Fracture Toughness Properties ofParts made from Liquid Crystal Stereolithography Resins 

      Ulett, J.S.; Benson-Tolle, T.; Schultz, J.W.; Chartoff, R. P. (1998)
      Liquid crystal (LC) resins are a new kind ofstereolithography material that can produce parts with structured or ordered morphologies instead ofthe amorphous morphologies that result from standard resins. The LC molecules ...
    • A Visual Tool to Improve Layered Manufacturing Part Quality 

      Kattethota, Gautham; Henderson, Mark (1998)
      A software tool is described that will aid the user in. choosing the optimum build orientation to obtain the ..best composite set of surface finishes on a part built .on a Fused Deposition Modeling (FDM) rapid prototyping ...
    • Materials for Biomedical Applications 

      Barlow, J. W; Lee, G.; Aufdemorte, T. B.; Fox, W. C; Swain, L.D.; Vail, N.K (1998)
      This paper discusses two ceramic material systems for selective laser sintering (SLS) that are being developed for biomedical applications for use in repair of bone defects. SLS is the preferred method of fabricating ...
    • Recent Developments in Robocasting of Ceramics and Multimaterial Deposition 

      Cesarano Ill, Joseph; King, Bruce H.; Denham, Hugh B. (1998)
      Robocasting is a freeform fabrication technique for dense ceramics and composites that is based on layer-wise deposition of highly loaded colloidalslurries. The process is essentially binderless with less than 1% organics ...
    • Automated Fabrication of Complex Molded Parts Using Mold SOM 

      Cooper, A.G.; Kang, S.; Kietzman, J.W.; Prinz, F.B.; Lombardi, J.L.; Weiss, L. (1998)
      Mold Shape Deposition Manufacturing (Mold SDM) is a Solid Freeform Fabrication technique for producing complex shaped fugitive wax molds. A vari~ty of castable. polymer and ceramic materials have been used to make parts ...
    • Mechanical Behavior of Robocast Alumina 

      Denham, Hugh B.; Cesarano III, Joseph; King, Bruce H.; Calvert, Paul (1998)
      Direct fabrication of alumina parts by robocasting was completed. This method is based on three-dimensional deposition of binderless aqueous alumina slurries. Parts were made with different deposition paths and ...
    • Domain Decomposition and Space Filling Curves in Toolpath Planning and Generation 

      Bertoldi, M.; Yardimci, M; Pistor, C. M; Guceri, S. I. (1998)
      Ever increasing computer performance, along with significant developments in CADI CAM technology and high precision digital motion controllers lead to rapid and significant developments in the field ofrapid prototyping ...
    • Dimensional Variability Analysis ln Post-Processing Of Rapid Tooling 

      Wang, Wanlong; Conley, James G; W Stoll, Henry (1998)
      Rapid tooling for sand casting can be made by creating pattern with elements made by solid freeform fabrication (SFF) devices. Using this approach, post-processing and hand finishing remain as necessary steps to improve ...