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     Technical Papers


¡¥GREEN¡¦ NANOCOMPOSITE USING SOY PROTEIN AND NANOCLAY PARTICLES
Xiaosong Huang and Anil N. Netravali Fiber Science Program, Cornell University Ithaca, NY 14853
Considerable amount of research is being conducted at present in developing biodegradable polymers and composites because of the environmental problems caused by petroleum-based non-degradable materials that are currently being used. Mechanical propert...


0.94-METER (37-INCH) CRYOGENIC DEMONSTRATION TANK
M.J. Warner, D. J. Son, D.M. Lester Thiokol Propulsion Brigham City, Utah Approved for public release; distribution unlimited.
This paper presents the design, analysis, fabrication, and testing of a 940 mm (37-inch) diameter by 1,118 mm (44-inch) long cryogenic demonstration tank that was developed and manufactured under a contract for SRS Technologies of Huntsville, Alabama. ...


10 YEARS OF SEISMIC AND STRENGTHENING CASE HISTORIES USING FRPS IN THE NORTHWEST
Peter Barlow Contech Services, Inc. Seattle, Washington
A review of five case studies detailing the application of FRPs in both transportation and building applications for seismic as well as strengthening applications. Material properties and engineering rational for the selection of both glass and carbon...


120MM PRESTRESSED THERMOPLASTIC COMPOSITE OVERWRAPPED GUN TUBE
Andrew Littlefield, Edward Hyland, and John Keating US Army RDECOM-ARDEC Benét Laboratories Watervliet, NY 12180 USA
The emphasis on lightweight large caliber weapons systems has placed the focus on the use of advanced composite materials. Using composite materials not only directly removes weight from the gun tube but, by better balancing the tube, allows the use of...


2006 WESTERN WASHINGTON UNIVERSITY HUMAN POWERED SUBMARINE: THE VIKING DREKAR
Nicole Larson, Carissa Book, Randy Holt, Dave Gertler Western Washington University . Plastics Engineering Technology Bellingham, WA 98225
Biennially, the Human Powered Submarine (HPS) Races are held in Southern California. Western Washington University (WWU) participated by entering a seventeen-foot long, two- person, propeller driven submarine named the Drekar. It was entirely student d...


3-D PROCESS MODEL FOR AUTOCLAVE CURING OF LARGE COMPOSITE STRUCTURES
X. Zeng, J. Raghavan, and V. Kaushik Composites Materials & Structures Research Group, University of Manitoba Winnipeg, Manitoba, R3T 5V6, Canada Loren Hendrickson Boeing Canada Technology - Winnipeg Division, Winnipeg, Manitoba, R3J 3M6, Canada
A three-dimensional finite element-based process model has been developed for the prediction of process-induced warpage during autoclave processing of large composite structures. This process model includes various sub-modules viz. input module, 3-D SIMCL


3D REFRACTION COMPUTED TOMOGRAPHY APPLIED TO METAL MATRIX COMPOSITES
Bernd R. Müller, Axel Lange, Michael Harwardt, Manfred P. Hentschel, Bernhard Illerhaus, Jürgen Goebbels, Joachim Bamberga, Falko Heutlinga Federal Institute for Materials Research and testing (BAM), Germany a MTU Aero Engines, Germany
For the first time Metal Matrix Composites (MMC) have been investigated by 3D Computed Tomography combined with enhanced interface contrast due to X-ray refraction. X-ray refraction is a relatively new approach for the characterization of advanced ma...


3D SPLINE VARIATIONAL ANALYSIS OF A COMPOSITE DOUBLE-LAP SHEAR JOINT
Gregory A. Schoeppner, David H. Mollenhauer Air Force Research Laboratory, AFRL/MLBC, Wright-Patterson AFB, OH 45433 and Endel Iarve University of Dayton Research Institute, Dayton, OH 45469
Adhesive bonding has been used to join or repair metallic and/or composite structural components to achieve or restore their designed structural stiffness and strengths. It has been demonstrated in numerous programs over many years that the critical in...


3D WEAVING: WHAT, HOW, AND WHERE
Larry Dickinson, Mansour Mohamed and Alexander Bogdanovich 3TEX, Inc. 10 17 Main Campus Drive, Suite 3200, Raleigh, NC 27606
There have been many publications on 3D Weaving, and there are numerous patents on a variety of devices that may be used to make a 3D Woven structure. The majority of the 3D woven products that are currently commercially available are formed by a 2D we...


3D-BRAIDED TEXTILE PREFORMS ¡V FROM VIRTUAL DESIGN TO HIGH-PERFORMANCE-BRAID
Jan Stueve, Thomas Gries Institut fuer Textiltechnik, RWTH Aachen University, Aachen, Germany Narciso Tolosana Enrech Department of Mechanical Engineering, University of Zaragoza, Zaragoza, Spain
Among various textile processes for the production of textile reinforcement structures, 3D-braiding is a quite young technology that enables the production of near-net-shape textile preforms without generating waste. First applications of 3D-braids for...


3D-REINFORCEMENT OF COMPOSITE T-JOINTS BY MEANS OF ROBOT ASSISTED STITCHING TECHNOLOGY ¢X¢X ¢X ¢X (0) 89 607 22966 *
Germany, Manuel.Herkt@eads.net, Peter.Middendorf@eads.net, Marinus.Schouten@eads.net, Phone: +49 (0) 89 607 27993, +49 (0) 89 607 26595, +49 (0) 89 607 22966 +EADS Military Aircraft, MT212, 81663 Munich, Germany, Christian.Less@eads.com Phone: +49 (0) 89 607 38189 * Fraunhofer Institut fur Kurzzeitdynamik, Ernst-Mach-Institut (EMI), Eckerstrase 4 79104 Freiburg, Germany, Werner.Riedel@emi.fhg.de, Phone: +49 (0) 761 2714 335 #University of Stuttgart, Institute of Aircraft Design, Pfaffenwaldring 31, 70569 Stuttgart, Germany, Drechsler@ifb.uni-stuttgart.de, Phone: +49 (0) 711 685 2402
Focus of this paper is to show the manufacturing of reinforced T-joints and give a short outlook on their performance under dynamic strength testing in a specially designed testing facility. Another aspect is the strain rate dependence of the tested sa...


A 3-D PERCOLATION MODEL FOR CONDUCTIVE PARTICULATE COMPOSITES
D.L. Dummer P.E. & , D.W. Radford PhD. Composite Materials, Manufacture, & Structures Laboratory (970) 491-8677 Colorado State University Mechanical Engineering Fort Collins, CO 80523-1374
Percolation in particulate filled composites has not been adequately simulated in a 3D continuum space. The physical attributes of these two-phase materials are not well characterized by the approaches of classical percolation theory and thus, predic...


A BASIC PROCESS MODEL FOR EB CURING OF COMPOSITE MATERIALS
Andrew Johnston1, Kenneth C. Cole2, Mehdi Hojjati1, Matteo Mascioni3, Giuseppe R. Palmese3 and Vince J. Lopata 4 1. National Research Council of Canada, Institute for Aerospace Research, Ottawa, ON, Canada K1A 0R6 2. National Research Council of Canada, Industrial Materials Institute, Boucherville,
The development and application of a simple process model for electron beam (EB) and UV processing of polymers and composites is presented. This model incorporates a one-dimensional heat transfer analysis coupled with a recently developed model for the...


A BRIEF HISTORY OF ANALYSIS METHODOLOGY FOR GRID- STIFFENED GEODESIC COMPOSITE STRUCTURES
L. W. Rehfield Mechanical and Aeronautical Engineering University of California Davis, CA
Strictly speaking, geodesic is the shortest line between two points that lie in a given surface. When used as an adjective to describe a structural configuration, a pattern of stiffeners or ribs is implied with no insistence on the shortest length for ...


A COMPARATIVE STUDY OF THE ENVIRONMENTAL DURABILITY OF THERMOPLASTIC COMPOSITES
Lloyd V. Smith, Washington State University Pullman, WA 99164-2920 Benjamin D. Campbell, Kim Peterson Boeing Commercial Airplane Group Renton, WA 98055
This study examines the environmental resistance of emerging thermoplastic composites that are under consideration for aerospace applications. A tensile coupon with a biased ±45° orientation was selected to examine the matrix response under static, cr...


A COMPARATIVE STUDY OF THE INTERLAMINAR SHEAR STRENGTH OF C/C COMPOSITES
Haya Weisshaus*, Ori Ishai TECHNION, Israel Institute of Technology, Mechanical Engineering, Materials Mechanics Laboratory, Haifa 32000, ISRAEL
The most common method to evaluate the interlaminar shear strength (ILSS) of composites is by flexure loaded short beam (SB) specimens, according to ASTM D-2344. This method often fails to give pure shear strength when the flexure to shear ratio is low...


A COMPARATIVE STUDY ON
CORROSION PROTECTION USING FRPs Marc DEMERS, Kenneth W. NEALE and Pierre LABOSSIÈRE Department of Civil Engineering University of Sherbrooke Sherbrooke, Quebec, Canada
An experimental investigation has been carried out to assess the corrosion protection that can be provided by three fibre reinforced polymer (FRP) materials (glass FRP, carbon FRP and aramid FRP), and two more conventional materials (siloxan and poly...


A COMPARISON OF MECHANICAL AND FIRE PROPERTIES OF ECO-CORE WITH A COMPATITIVE COMMERCIAL MATERIAL
Robert Sadler, Matthew Sharpe and Kunigal Shivakumar North Carolina A & T State University Greensboro, NC 27411
A fire resistant insulation panel material called Eco-Core has been developed at North Carolina A&T State University. Eco-Core is composed of about 83% fly ash, a waste material from coal- fired power plants. The remainder is a fire resistant organic b...


A COMPARISON OF OPEN-HOLE COMPRESSION FIXTURES BY EXPERIMENTAL EVALUATION
Scott L. Coguill and Donald F. Adams Composite Materials Research Group University of Wyoming Laramie, Wyoming 82071
The open-hole compression test is the most common test method used to determine the notched compressive strength of polymer matrix composite laminates. The notched compressive strength is widely used as a material specification, as a quality assurance ...


A COMPOSITE MATERIAL QUALIFICATIONMETHOD THAT RESULTS IN COST, TIME AND RISK REDUCTION
John S. Tomblin, Wichita StateUniversity / National Institute forAviation Research,Wichita,KS 67260 John D. Tauriello and Sean P.Doyle, FiberCote Industries, Inc.,Waterbury, CT 06708
One of the largest single regulatory hurdles for an airframe manufacturer, i.e., user, of polymer based advanced composite materials in certified aircraft applications, is to generate design allowables that will satisfy Federal Aviation Regulations (FA...

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