• Evaluation of a progressive damage model for a single lap-shear joint of multi-directional laminates 

  Carrillo, Rodrigo M. (Wichita State University, 2018-07)

  This document presents results from a numerical study of the progressive damage capabilities of the MAT162 material model in Ls-DYNA explicit finite element code. Single-shear fastener lap joint of multi-directional laminates ...

• Loss of control prediction system for the longitudinal and lateral dynamics of an aircraft using Laplace methods 

  Rajaram, Kiran (Wichita State University, 2018-07)

  Loss-of-control events have contributed to many accidents worldwide to this date. A signi cant amount of research has been done to provide safer ight conditions and thus prevent such events from occurring. One such ...

• Fast and robust computation of low-thrust orbit-raising trajectories 

  Sreesawet, Suwat; Dutta, Atri (American Institute of Aeronautics and Astronautics, Inc. Read More: https://arc.aiaa.org/doi/10.2514/1.G003319, 2018-09)

  This paper presents a new dynamic model of a thrusting spacecraft, and the model is used for computing low-thrust orbit-raising trajectories to the geosynchronous equatorial orbit. Low-thrust orbit raising is a challenging ...

• A novel methodology for fast and robust computation of low-thrust orbit-raising trajectories 

  Sreesawet, Suwat; Dutta, Atri (Univelt, Inc., 2017)

  All-electric spacecraft makes numerous revolutions during the orbit-raising to the geosynchronous equatorial orbit. This paper presents a new mathematical formulation to describe the dynamics of the spacecraft under the ...

• De-orbit time of on-orbit debris for laser-based removal methods 

  Karampudi, Prathyusha; Dutta, Atri (Univelt, Inc., 2017)

  The amount of space debris in the near-Earth space environment poses a major challenge for current and future space missions. Controlling the growth of on-orbit debris utilizing on-orbit debris removal missions is of great ...

• Demand-side energy management by use of a Design-then-Approximate controller for aggregated thermostatic loads 

  Ghanavati, Meysam; Chakravarthy, Animesh (IEEE, 2018-07)

  This brief presents a method to design a controller for a system of aggregated thermostatically controlled loads (TCLs) that are represented by two coupled partial differential equations-the Fokker-Planck equations. The ...

• A three-dimensional numerical analysis of the effect of embedding cylindrical microwire sensors on the compressive strength of carbon-fiber reinforced composite laminates 

  Maini, Raghav (Wichita State University, 2017-12)

  The objective of this 3D finite element analysis study is to evaluate the effect on compressive strength of a laminated composite specimen, when cylindrical microwire tubes are embedded inside the structure. These microwire ...

• Characterization of tensile and compressive properties of single fiber filament of TOHO HTS 40 carbon fiber 

  Panchal, Vaidehi (Wichita State University, 2017-12)

  In this work, the longitudinal tensile and compressive properties of TOHO HTS 40 carbon fiber filaments was characterized experimentally. The tensile strength and modulus were measured using a single filament tension tests ...

• Strength characterization of chopped-fiber composites using Iosipescu test method 

  Poomal Raj, Mounica Nandhini (Wichita State University, 2017-12)

  In the aviation industry, composites are considered high-performance structural materials. Composite materials are mainly used in fuselages, wings, propellers, interior components, landing gears, doors, etc. Their main ...

• A numerical study on the triaxiality distribution in a single shear lap fastener joint 

  De Abreu Barriga, Armando A. (Wichita State University, 2017-12)

  Fastened joints are used extensively in the aerospace industry and play an important role in defining the crashworthiness of the structure [1, 2]. As larger finite element models (FEM) are developed, joints are typically ...

• Biologically motivated quantum neural networks 

  Unknown author (IEEE, 2017)

  This paper presents one step toward creating the building blocks for machine intelligence that is inspired by its biological equivalent. The authors' quantum learning methods (deep quantum learning) are applied to quantum ...

• PDE-based analysis of automotive cyber-attacks on highways 

  Ghanavati, Meysam; Chakravarthy, Animesh; Menon, Prathyush (IEEE, 2017-05)

  This paper considers scenarios wherein a group of malicious vehicles on a highway perform a cooperative attack with the motive of creating undesirable wave effects among other vehicles on the highway. The two species of ...

• A decentralized adaptive control architecture for large-scale active-passive modular systems 

  Gruenwald, Benjamin C.; Arabi, Ehsan; Yucelen, Tansel; Chakravarthy, Animesh; McNeely, Drew (IEEE, 2017-05)

  Decentralized control of large-scale active-passive modular systems is considered. These systems consist of physically interconnected and generally heterogeneous modules, where local control signals can be only applied to ...

• Avoidance maps: a new concept in UAV collision avoidance 

  Tony, Lima Agnel; Ghose, Debasish; Chakravarthy, Animesh (IEEE, 2017)

  A new concept of avoidance map is introduced which can effectively execute collision avoidance among UAVs. It is based upon representation of the effect of control effort by pairs of UAVs on achievement of avoidance, thus ...

• Real-time Google Glass Heads-Up Display for rapid air-traffic detection 

  Rafi, Melvin; Chandrasekaran, Balaji K.; Kusmez, Bill; Steck, James E.; He, Jibo (American Institute of Aeronautics and Astronautics, Inc., 2018-01)

  As airspace becomes increasingly crowded, the need for next-generation traffic-advisory systems for pilots has become more crucial. To this end, a heads-up advisory display is developed within the Google Glass platform to ...

• A numerical investigation of the onset of flow separation in round-edge diverging tees 

  Kok, Foo; Myose, Roy Y.; Hoffmann, Klaus A. (ASME, 2018-03)

  The onset condition of flow separation in diverging tee junctions was investigated numerically. Flow separation and recirculation at the proximal region of a bypass graft can contribute to early phase graft failure in ...

• Numerical simulation of the leaflet designs to improve hemodynamics of mechanical heart valves 

  Sirous, Omid (Wichita State University, 2017-07)

  Mechanical heart valves (MHVs) are widely implanted due to their reliability and long life span. However, patients who receive MHV implants are required and prescribed anticoagulant medication to reduce the high risk of ...

• Design of an adaptive flight controller for a bird-like flapping wing aircraft 

  Chandrasekaran, Balaji K. (Wichita State University, 2017-07)

  In the present age of increased demand for unmanned aerial vehicles, flapping wing unmanned aerial vehicle applications have become of interest, primarily because of their ability to fly silently and at lower speeds. This ...

• Optimal aircraft trajectories for wind energy extraction 

  Zhao, Yiming; Dutta, Atri; Tsiotras, Panagiotis; Costello, Mark (American Institute of Aeronautics and Astronautics, Inc., 2018-02)

  It is well known that birds and air vehicles are capable of extracting energy from atmospheric winds. Land birds such as condors and vultures remain aloft for hours at a time without flapping their wings. In straight and ...

• Adaptive control for fault tolerant autonomous launch and recovery 

  Reed, Scott (Wichita State University, 2017-05)

  This work presents the use of adaptive control methodologies for the recovery to an aircraft carrier of an autonomous fixed wing aircraft. The control architecture used is model reference adaptive control that is implemented ...

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