• Trussed Structures: FreeForm Fabrication without the Layers 

      Pegna, Joseph; Messia, David; Lee, Woo Ho (199)
      Recent progress in 3D-LCVD have demonstrated the advantages ofrod micro-fabrication, both from the point of view of the range of volumetric deposition rates -from 1cl- to 109 cubic micron per second- andfrom the point ...
    • Simulation Of Coarsening During Laser Engineered Net Shaping 

      Tikare, Veena; Griffith, Michelle; Schlienger, Eric; Smugeresky, John (1997)
      Laser Engineered Net_Shaping, otherwise known as LENSTM, is an advanced manufacturing technique used to fabricate complex near net shaped components directly from engineering solid models without the use of dies or ...
    • Solid Model Creation for Materially Graded Objects 

      Kumar, Vinod; Dutta, Debasish (1997)
      Materially graded objects are objects composed of different constituent materials and could exhibit continuously varying composition and/or microstructure [1][2]. Such continuous changes results in gradation in their ...
    • On dimensional stabilities: Modeling of the Bonus-Z during the SLS Process 

      Papadatos, Alexandre L.; Ahzi, Said; Deckard, Carl R.; Paul, Frank W. (1997)
      This work is a first step towards the prediction of the dimensions and thermomechanical properties ofparts made with the Selective Laser Sintering (SLS) technology. An important variation of the dimensions is found in ...
    • Issues Associated with EFF & FDM Ceramic Filled Feedstock Formulation 

      Lombardi, John L.; Hoffinan, Robert A.; Waters, Jason A.; Popovich, Dragan (1997)
    • Recent Developments in Freeform Fabrication of Dense Ceramics From Slurry Deposition 

      Cesarano TIl, Joseph; Baer, Thomas A.; Calvert, Paul (1997)
      A freeform fabrication technique for dense ceramics and composites has been developed. The technique requires less than 2 volume percent of organic additives and relies on the principle of layerwise deposition of highly ...
    • Rapid Prototyping Decision Support System 

      Jones, K. G.; Campbell, R. I. (1997)
      An application has been produced to rate Rapid Prototyping system suitability based on designer requirements. The software is part of a project to produce a comprehensive Design For Rapid Prototyping (DFRP) methodology. ...
    • Extrusion Freeform Fabrication of Bone-Like Mineralized Hydrogels and Muscle-like Actuators 

      Zengshe, Liu Paul, Calvert (1997)
      Extrusion freeform fabrication has been used to build shapes from agarose, polyacrylamide and polyacrylic acid hydrogels. Contraction and bending can be induced by pH change or application ofa voltage between embedded ...
    • Multi-Material Processing By Lens 

      Griffith, Michelle L.; Harwell, Lane D.; Romero, J. Tony; Schlienger, Eric; Atwood, Clint L.; Smugeresky, John E. (1997)
      During the past few years, solid freeform fabrication has evolved into direct fabrication of metallic components using computer aided design (CAD) solid models. [1-4] Laser Engineered Net Shaping (LENS™) is one such ...
    • High green density ceramic components fabricated by the slurry-based 3DP process 

      Grau, Jason; Moon, Jooho; Uhland, Scott; Cima, Michael; Sachs, Emanuel (1997)
      The 3DP process has been modified to directly fabricate high green density parts using submicron powder. The slurry-based 3DP process deposits the powder bed by spraying a dispersed slurry of the component material onto ...
    • High Pressure, Convectively-Enhanced Laser Chemical Vapor Deposition of Titanium 

      Maxwell, James; Krishnan, Ramnath; Haridas, Suresh (1997)
      Laser chemical vapor deposition is a freeform technique that can generate three-dimensional structures from organometallic or metal halide precursors. To obtain enhanced growth rates, a novel high pressure reactor has ...
    • Bonding Methods for Laminated Tooling 

      Walczyk, Daniel F.; Dolar, Nathanael Y. (1997)
      Laminated tooling consists of an array of stacked laminations that are mechanically clamped or bonded together, depending on the requirements of the manufacturing process. Various manufacturing processes that can benefit ...
    • Empirical Similitude Method for the Functional Test with Rapid Prototypes 

      Cho, Uichung; Wood, Kristin (1997)
      Rapid prototyping has the potential to improve the performance of the design process both in cycle time and resources. Such improvements may be realized through the timely visual, ergonomic, and functional information ...
    • Stereolithography Injection Mould Tool Failure Analysis 

      Rahmati, Sadegh; Dickens, Philip (1997)
      Manufacturing technology does not always enjoy the traditional cost benefits of mass production because large quantities may not be required. Separating low cost from high volume requires new approaches to product and ...
    • Microscopic Flow Observation of Photopolymer by UV-Laser Beam Exposure 

      Xu, Yi; Imamura, Masato; Nakagawa, Takeo (1997)
      Microscopic flow of liquid photopolylner around the cured polymer was observed during laser exposure. The maximum velocity was about 4 mm/s. The temperature raised by reaction heat, causes the density of liquid photopolymer ...
    • Reaction Heat Effect On Initial Linear Shrinkage of Sterelothigraphy Resins 

      NARAHARA, Hiroyuki; TANAKA, Fumiki; KISHINAMI, Takeshi; IGARASHI, Satoru; SAITO, Katsumasa (1997)
      In the industrial use ofthe Stereolithography, the precision is always a problem. Basic phenomenon of the solidification shrink has not suffiCiently investigated This study aims at clarifying the initial linear shrinkage ...
    • Sterelithography of Ceramics 

      Himmer, T.; Nakagawa, T.; Noguchi, H. (1997)
      For studies of Stereolithography of Ceramics (SOC), a composite has been produced by mixing ceramic powder with a photosensitive resin. To obtain high load of ceramics a lamination preprocess was used. Then, the produced ...
    • FDM of ABS Patterns for Investment Casting 

      Blake, Paul; Fodran, Eric; Koch, Martin; Menon, Unny; Priedeman, Bill; Sharp, Stephen (1997)
      This paper will evaluate the suitability offused deposition modeling (FDM) of acrylonitrile butadiene styrene (ABS) patterns for use in investment casting. The focus is on integration with existing foundry practices. It ...
    • Zirconium Diboride/Copper EDM Electrodes From Selective Laser Sintering 

      Stucker, Brent; Bradley, Walter; Eubank, P.T.; Norasetthekul, Somchintana; Bozkurt, Bedri (1997)
    • Liquid Metal Jetting for Printing Metal Parts 

      Cesarano TI, Joseph; Baer, Thomas A.; Calvert, Paul (1997)
      Liquid Metal Jetting (LMJ) is solid freeform fabrication process for producing metal mechanical parts and electronic interconnects. It is a technology similar to ink jet printing where individual molten droplets are ...