1–20 of 129 hits
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    21st century steels for 21st customers: Flat and long steel product development

    Elliot, Chris | Tema Archive | 2007
    present day, the predominant structural solution is essentially the same, namely a fine high carbon-manganese steel pearlitic structure ...

    A Conceptual Aerospace Vehicle Structural System Modeling, Analysis and Design Process

    Mukhopadhyay, Vivek | NTRS | 2007
    scenarios are generated for analyzing several structural configurations and material alternatives. The structural stress, deflection, strain, and ...
    Publisher: NASA National Aeronautics and Space Administration
    Keywords: Spacecraft Design, Testing And Performance

    Acoustic vibration model of a composite shell with sound absorption material

    Dungan, M.R. / Mollo, C. / Vlahopoulos, N. et al. | Tema Archive | 1996
    only in two dimensions. This formulation assumes an isotropic structural member that couples with the elastic porous material. To expand beyond ...
    Publisher: American Institute of Aeronautics and Astronautics (AIAA) , Reston
    Keywords: poröser Werkstoff , Scherung (Werkstoff)

    Active vibration control in rotorcraft systems using smart actuators

    Anderson, G.L. / Garg, D.P. | Tema Archive | 2002
    the structure. A smart structure is generally composed of a number of distributed sensors and actuators embedded and/or surface-mounted on a ...

    Adaptive Modeling, Engineering Analysis and Design of Advanced Aerospace Vehicles

    Mukhopadhyay, Vivek / Hsu, Su-Yuen / Mason, Brian H. et al. | NTRS | 2006
    conceptual design of advanced aerospace vehicle concepts. With demanding structural and aerodynamic performance requirements, these high fidelity ...
    Publisher: NASA National Aeronautics and Space Administration
    Keywords: Spacecraft Design, Testing And Performance

    A design scheme aimed at minimizing actuator and structural loads of a span morphing aircraft

    Boothe, Kenny | Tema Archive | 2006
    . These surface pressures cause undesired moments and forces on the control effectors that are morphing the structure. This paper focuses on the ...

    Aeroelastic considerations for continuous patrol/high altitude surveillance platforms

    Turner, C. D. / Rocketts, R. H. | NTRS | 1983
    power, a cryogenically fueled engine, or microwave-power. Attention is given to airborne platform configuration, structure, structural and ...
    Publisher: NASA National Aeronautics and Space Administration
    Keywords: Aircraft Design, Testing And Performance

    Aeroelastic Tailoring of the NASA Common Research Model via Novel Material and Structural Configurations

    Jutte, Christine V. / Stanford, Bret K. / Wieseman, Carol D. et al. | NTRS | 2014
    is generally strong, although one case showed both a 100% flutter improvement and a 3.5% weight reduction. Material grading showed no benefit ...
    Publisher: NASA National Aeronautics and Space Administration
    Keywords: Aircraft Design, Testing And Performance

    Aerothermoelastic analysis of a NASP demonstrator model

    Heeg, J. / Zeiler, T.A. / Pototzky, A.S. et al. | Tema Archive | 1993
    flight through the atmosphere could destiffen a structure, significant couplings between the elastic and rigid body modes could result in lower ...

      Aerothermoelastic analysis of a NASP demonstrator model

      Heeg, Jennifer / Zeiler, Thomas A. / Pototzky, Anthony S. et al. | NTRS | 1993
      flight through the atmosphere could destiffen a structure, significant couplings between the elastic and rigid body modes could result in lower ...
      Publisher: American Institute of Aeronautics and Astronautics
      Keywords: Launch Vehicles And Space Vehicles

    A mobile transporter concept for EVA assembly of future spacecraft

    Watson, Judith J. / Bush, Harold G. / Heard, Walter L., Jr. et al. | NTRS | 1990
    Station size structure is viable and practical. Additionally, the Mobile Transporter could be used to construct other spacecraft such as the ...
    Publisher: NASA National Aeronautics and Space Administration
    Keywords: Spacecraft Design, Testing And Performance

    A multifunctional flexure hinge for deploying omnidirectional solar arrays

    Hinkley, D. / Simburger, E.J. | Tema Archive | 2001
    an extremely flexible metal has been suggested. In this paper, the prior use of the superelastic Ti-Ni alloy for the structure, hinge and ...

    Analysis and Testing of a Composite Fuselage Shield for Open Rotor Engine Blade-Out Protection

    Pereira, J. Michael / Emmerling, William / Seng, Silvia et al. | NTRS | 2015
    new engines that would not have a containment structure on large commercial aircraft. Equivalent safety to the current fleet is desired by the ...
    Publisher: NASA National Aeronautics and Space Administration
    Keywords: Aircraft Design, Testing And Performance , Composite Materials , composite materials

    Analysis of Damping Performance for Cabin Deck Covered with Floating Floor Coverings

    Liang, Bing-Nan / Yu, Hong-liang / Song, Yu-Chao | Tema Archive | 2012
    coverings and cabin deck and based on ANSYS system, a dynamics analysis on structures of three different kinds of floating floors is performed using ...
    Keywords: Strukturdynamik

    Analysis of high energy impact on lightweight composite (sandwich) structures

    Stresing, D.W. / Binienda, W.K. / Dhruva, V. | Tema Archive | 2001
    damage. The task is quite difficult due to the nature of the composite materials and the non-linear failure of the structure and impacting object ...

    Analysis of weld defects in offshore structural H beams

    Lee, Hee Keun / Kim, Jin Yong / Hwang, In Hwang | Tema Archive | 2008
    H beam welds along rolling and transverse direction were investigated with nondestructive testing, mechanical testing and microstructural ...

    Analysis techniques for shape-memory composite structures

    Schultz, Marc R. / Francis, William H. / Campbell, Douglas et al. | Tema Archive | 2007
    observed failure mechanism, and aided in structural design changes and improvement of key performance metrics of the structure. ...

    Analytical Approach for Estimating Preliminary Mass of ARES I Crew Launch Vehicle Upper Stage Structural Components

    Aggarwal, Pravin | NTRS | 2007
    . The fully integrated Upper Stage is a mix of modified existing heritage hardware (J-2X Engine) and new development (primary structure ...
    Publisher: NASA National Aeronautics and Space Administration
    Keywords: Launch Vehicles And Launch Operations

    An analysis of warping effects on the static and dynamic response of an aircraft seat-type structure

    Rahematpura, M. / Hooper, S.J. | Tema Archive | 1994
    seat-type structure subjected to impact loading. The test article design featured thin-walled open-section beams and was loaded inertially by a ...

    An analytical comparison of two wing structures for Mach 5 cruise airplanes

    Taylor, A. H. / Jackson, L. R. / Cerro, J. A. et al. | NTRS | 1983
    propulsion system, fuselage, and wings. Various studies have shown that the achievement of adequate range is largely dependent on a low structural ...
    Publisher: NASA National Aeronautics and Space Administration
    Keywords: Aircraft Design, Testing And Performance

    A new substructures system identification method

    Craig, R.R. jun. | Tema Archive | 1995
    interface-DOF entries included. Multiple-boundary-condition tests are not required, and test-stand dynamics is accounted for without a separate test ...
    Publisher: American Institute of Aeronautics and Astronautics (AIAA) , Washington