1–20 von 469 Ergebnissen
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    Identification of nonlinear helicopter rotor structural dynamics

    Tasker, F.A. / Yu, Zehngchen | Tema Archiv | 1994
    developed using finite elements in space with approximation of distributed parameters and finite elements in time. Response sensitivities are ...

    Reentry flight and ground testing experience with hot structures of C/C-SiC material

    Hald, H. / Ullmann, T. | Tema Archiv | 2003
    understanding of the complex physical and chemical material surface interaction phenomena with the high enthalpy plasma flow field during atmospheric ...
    Schlagwörter: faserverstärkter Werkstoff , carbonfaserverstärkter Werkstoff

    Enhanced structural damage tolerance of CFRP primary structures by Z-pin reinforcement

    Clarke, A. / Greenhalgh, E. / Meeks, C. et al. | Tema Archiv | 2003
    stiffness in structures subjected to high strains. Z-pins within this programme are considered for the control of delamination and their location ...

    Space program supporting technologies: structures, materials, and signal processing

    Schutzenhofer, L.A. / Blalock, S.J. / Johnston, L. et al. | Tema Archiv | 1995
    analysis, fracture mechanics, structural testing, structural dynamics, vibroacoustics, and probabilistics. It is demonstrated that each technology ...
    Verlag: American Institute of Aeronautics and Astronautics (AIAA) , Washington

    Analysis techniques for shape-memory composite structures

    Schultz, Marc R. / Francis, William H. / Campbell, Douglas et al. | Tema Archiv | 2007
    Elastic memory composite (EMC) materials consist of traditional fiber reinforcement (carbon, glass, etc.) and a fully cured thermoset shape ...

    Optimization of a morphing wing based on coupled aerodynamic and structural constraints

    Vale, J. / Lau, F. / Suleman, A. et al. | Tema Archiv | 2007
    This work is a development of previous work where improvements on the computational models, both aerodynamic and structural, have been ...

    Design, characterization and evaluation of material systems for ballistic resistant body armor: A comparative study

    David, N.V. / Gao, X.L. / Zheng, J.Q. | Tema Archiv | 2008
    number of studies related to new concepts and designs of body armor materials have been conducted in the past two decades to meet the new demands ...
    Verlag: American Institute of Aeronautics and Astronautics (AIAA) , Reston
    Schlagwörter: keramischer Werkstoff

    Structural dynamic conceptual design of satellites by design language

    Harmsen, Nils / Kormeier, Thomas / Rudolph, Stephan | Tema Archiv | 2007
    This paper presents a methodology for the conceptual design synthesis and subsequent automated structural dynamic analysis of satellites ...

    Piezoelectric wafer active sensor structural health monitoring of space structures

    Zagrai, Andrei / Doyle, Derek / Gigineishvili, Vlasi et al. | Tema Archiv | 2010
    during launch, and model updating from an assessment of in-service variation of structural properties. The article presents a discussion of ...
    Schlagwörter: SHM (structural health monitoring)

    Composite material compatibility with liquid and gaseous oxygen

    Robinson, M.J. / Stoltzfus, J.M. / Owens, T.N. | Tema Archiv | 2001
    Boeing and NASA are investigating the compatibility of composite materials with liquid and gaseous oxygen (LOX and GOX). The objective is ...

    Modal identification of membrane structures with videogrammetry and laser vibrometry

    Blandino, J.R. / Pappa, R.S. / Black, J.T. | Tema Archiv | 2003
    Laser vibrometry and videogrammetry are two techniques suitable for testing large, low mass flexible structures. Laser vibrometry is a ...

    A nonlinear, coupled fluid-structural dynamics code for cryogenic refrigerators based on the Oxford split-stirling cycle design

    Jacoby, M.S. / Nast, T. | Tema Archiv | 1994
    paper describes the development of a nonlinear, coupled fluid-structural dynamics code which has been used for the basic mechanical design of ...

    Smart-material based hydraulic pump system for actuation of a morphing wing

    Sneed, Ryan C. / Smith, Roland R. / Cash, Michael F. et al. | Tema Archiv | 2007
    A magnetostrictive material is used as a high frequency driving element in a hydraulic pump that provides fluid power for actuation of a ...
    Schlagwörter: intelligenter Werkstoff

    Structural modeling and control using neural networks

    Juang, Jyh-Ching / Chiang, Chi-Yuan / Youssef, H.M. | Tema Archiv | 1994
    through structural dynamics may deteriorate pointing accuracy or lead to instability. How to accurately model the structural dynamics and control ...

    A preliminary prediction method for the effect of new fuselage materials on transport aircraft weight

    Slingerland, Ronald / Van Rijn Van Alkemade, Florian / Vermeulen, Brent | Tema Archiv | 2007
    of different materials with such accuracy that it is possible to perform a material trade-off. Therefore a method has been developed for ...

    The role of buffeting the structural design of eurofighter

    Becker, J. / Luber, W. | Tema Archiv | 2003
    The application of buffet loads in the design of military aircraft structures are discussed and results from special detailed ...

    Characterization of polyimide foams for ultra-lightweight space structures

    Veazie, D.R. / Vincent, S. / Weiser, E. | Tema Archiv | 2003
    with higher structural strength. However, if the thermal protection and lighter weight (density) is of primary concern, TEEK(trademark) foams ...

    Design diagrams for reliable layered materials

    Spearing, S.M. | Tema Archiv | 1996
    Many components and structures consist of two or more layers of dissimilar materials bonded together over areas which are large relative to ...
    Verlag: American Institute of Aeronautics and Astronautics (AIAA) , Reston
    Schlagwörter: Bruch (Material)

    Damage tolerance design of composite structures

    Graesser, D.L. / Tuttle, M.E. | Tema Archiv | 1994
    A damage tolerance design requirement for composite fuselage structures is investigated. The displacement compatibility model, a method ...
    Schlagwörter: Bruch (Material)

    Aircraft dynamics and loads computations using CFD methods

    Appa, K. / Argyris, J. / Guruswamy, G.P. | Tema Archiv | 1996
    algorithms is presented and should hopefully advance the art of modern aircraft design. The method employs the concept of system identification to ...
    Verlag: American Institute of Aeronautics and Astronautics (AIAA) , Reston
    Schlagwörter: Dynamik