Now showing items 94-113 of 184

  • A hybrid scheme for the numerical simulation of shock/discontinuity problems 

    Mahmoudnejad, Niloufar; Hoffmann, Klaus A. (Taylor & Francis, 2011)
    To address accuracy issues for direct numerical simulation, a hybrid scheme based on the weighted compact scheme (WCS) and weighted essentially non-oscillatory (WENO) scheme is developed. The new hybrid method incorporates ...
  • Ice particle trajectory simulation 

    Suares, Ian Greg (Wichita State University, 2005-12)
    Large ice particles shed from an airframe can cause damage to downstream aerodynamic surfaces and aft mounted engines. A simulation tool was developed to compute the trajectories of shed ice particles and determine the ...
  • In-plane shear response of laminated composites at high strain rates 

    Dandayudhapani, Satish K.; Keshavanarayana, Suresh R. (Wichita State University. Graduate School., 2006-04-28)
  • Kinetics of prepreg epoxy resin curing for aircraft body repair 

    Dahanayake, Jayangika Niroshani (Wichita State University. Graduate School, 2014-04-25)
    Curing is the cross-linking of polymer chains, which results in toughening of polymer material and it is widely used in bonded composite repair for aerospace components. The main objective of this project is to analyze ...
  • Load rate effects on Interlaminar fracture toughness of composite materials 

    Nandakumar, Pratap Nuggehalli; Keshavanarayana, Suresh R. (Wichita State University. Graduate School, 2009-05-01)
    The energy dissipation due to the failure of composites is of particular interest for crash applications involving dynamic loading. Separation of layers or delamination which can occur in opening (mode-I) is one of the key ...
  • Load rate effects on the crush response of laminated corrugated beams 

    Tan, Kian Yip; Fazal Elyas, Sana (Wichita State University. Graduate School, 2010-04-23)
    This experimental study addresses the progressive crushing responses of laminated corrugated beams fabricated using Newport NB321/7781 E-glass prepreg material. Stacking sequences of [0]n and [45]n where n=4,8 and 12 have ...
  • Local bending containment in impact damaged sandwich panels 

    Ghimire, Mohan (Wichita State University. Graduate School., 2007-04-27)
    A repair technique involving the containment of local bending of sandwich facesheet by strategically filling honeycomb core cells has been explored to improve the damage tolerance of impact damaged sandwich panels. The ...
  • Local bending containment in sandwich panels with subsurface core damage 

    Ghimire, Mohan (Wichita State University, 2008-05)
    The compressive residual strength and behavior of impact damaged sandwich panels are governed by the amount of non-visible core damage underneath the facesheets. The failure modes under in-plane compressive loading are ...
  • Minimizing errors from linear and nonlinear weights of WENO scheme for broadband applications with shock waves 

    Arshed, Ghulam Murshed; Hoffmann, Klaus A. (Elsevier, 2013-03-29)
    Improvements in the numerical algorithm for the dynamics of flows that involve discontinuities and broadband fluctuations simultaneously are proposed. These two flow features suggest numerical strategies of a paradoxical ...
  • Minimum-fuel electric orbit-raising of telecommunication satellites subject to time and radiation damage constraints 

    Dutta, Atri; Libraro, Paola; Kasdin, N. Jeremy; Choueiri, Edgar Y.; Francken, Philippe (IEEE, 2014-06-04)
    The capability of a Geostationary satellite to perform electric orbit-raising enables the development of all-electric satellites. Key challenges to the realization of electric deployment of satellites to the Geostationary ...
  • A model following inverse controller with adaptive compensation for general aviation aircraft 

    Bruner, Hugh S. (2007-05)
    The theory for an adaptive inverse flight controller, suitable for use on General Aviation aircraft, is developed in this research. The objectives of this controller are to separate the normally coupled modes of the basic ...
  • Models and methods for bird strike load predictions 

    Nizampatnam, Lakshmi S. (Wichita State University, 2007-12)
    Typical bird shapes used in numerical bird strike analyses include a number of primitive geometries, such as the right circular cylinder, hemi-spherical cylinder, sphere and ellipsoid. There are also some simplifying ...
  • Modified state observer based adaptation of a general aviation aircraft - simulation and flight test 

    Subba Reddiar Pappu, Venkatasubramani; Steck, James E.; Rajagopal, Karthikeyan; Balakrishnan, S. N. (American Institute for Aeronautics and Astronautics, 2014-01)
    This paper presents some issues encountered while flight testing a Model Reference Adaptive dynamic inverse controller (MRAC), on a General Aviation (GA) fly-by-wire test bed. Adaptation was replaced with a Modified ...
  • Modified State Observer based adaptive control law design for the Black Kite MAV 

    Subba Reddiar Pappu, Venkatasubramani; Steck, James E.; Shanmugham, Viswanathan; Ramamurthi, Guruganesh (IEEE, 2014-06-04)
    This paper presents the design and simulation of a Modified State Observer (MSO) based adaptive control law, developed by Balakrishnan, for a Micro Aerial Vehicle (MAY). The MSO allows higher adaptive gains than other ...
  • Modified state observer based adaptive control law for general aviation and micro aerial vehicles 

    Subba Reddiar Pappu, Venkatasubramani (Wichita State University, 2014-07)
    The aim of this research is to assess the capability of Modified State Observer (MSO) based adaptations for use in controlling the longitudinal flight dynamics of a General Aviation (GA) type airplane and a Micro Aerial ...
  • Multiqubit entanglement of a general input state 

    Behrman, Elizabeth C.; Steck, James E. (Rinton Press, Inc., 2013-01)
    Measurement of entanglement remains an important problem for quantum information. We present the design and simulation of an experimental method for an entanglement indicator for a general multiqubit state. The system can ...
  • Non-planar lifting-line theory for fixed and deformable geometries 

    Kuenn, Aaron Douglas (Wichita State University, 2013-08)
    In this thesis, the lifting-line approximation of a flat, unswept wing, originally attributed to Prandtl, is investigated. The original formulation for a flat wing is examined in detail. The governing integro-differential ...
  • Nonlinear dynamic inversion control of a miniature morphing aircraft 

    Aponso, Gayanath Tharaka Goniyamalimige (Wichita State University, 2013-12)
    This thesis investigates the feasibility of using Dynamic Inversion to develop control laws for time varying systems, specifically Miniature Morphing Air Vehicles. Two Linear Time Varying systems are investigated namely a ...
  • Numerical analysis of blood flow in an aortocoronary bypass model 

    Kok, Foo (Wichita State University, 2015-05)
    Aortocoronary bypass (ACB) surgery is a treatment to bypass a blocked artery using a graft. Approximately 500,000 bypass surgeries are performed in the U.S. each year. Of these, about 15% to 20% have an early-phase failure, ...
  • Numerical analysis of blood flow in the human aorta and bypass grafts 

    Kok, Foo (Wichita State University. Graduate School, 2014-04-25)
    Blood flow is complex due to the presence of curves, multiple branches, non-Newtonian flow, and pulsating effect. Even when an individual receives a bypass which saves the patient, several years later a new bypass may be ...