Now showing items 1-20 of 61

  • Active wing shaping control of an elastic aircraft 

    Nobleheart, Wilfred; Chakravarthy, Animesh; Nguyen, Nhan (IEEE, 2014-06-04)
    In recent years, lightweight materials have been adopted in airframe design as a means to reduce aircraft weight. These lightweight materials provide adequate strength and durability, but at the expense of reduced structural ...
  • Adhesive-bonded composite joint analysis with delaminated surface ply using strain-energy release rate 

    Chadegani, Alireza; Yang, Chihdar; Smeltzer, Stanley S., III (AMER INST AERONAUT ASTRONAUT, 2012-03)
    This paper presents an analytical model to determine the strain energy release rate due to an interlaminar crack of the surface ply in adhesively bonded composite joints subjected to axial tension. Single-lap shear-joint ...
  • Analytical model of Van Allen proton radiation flux for trajectory optimization solvers 

    Foster, Alexander T.; Dutta, Atri (Univelt, Inc., 2015)
    Radiation damage is a concern for electric orbit-raising of spacecraft to the Geostationary orbit because the spacecraft spends a lot of time in the Van Allen radiation belts. Trajectory optimization solvers are required ...
  • Collision cones for quadric surfaces 

    Chakravarthy, Animesh; Ghose, Debasish (IEEE, 2011-12)
    The problem of collision prediction in dynamic environments appears in several diverse fields, which include robotics, air vehicles, underwater vehicles, and computer animation. In this paper, collision prediction of objects ...
  • A comprehensive modeling of choked two-phase flow through short-tube orifices with application to alternative refrigerants HFO-1234yf and HFO-1234ze 

    Javidmand, Puya; Hoffmann, Klaus A. (Elsevier Ltd., 2016-09)
    Due to the evaporating two-phase flow and the choked-flow condition, numerical analysis of flow through short-tube orifices is a complicated procedure. A comprehensive method for analyzing such flows is the two-fluid model, ...
  • Comprehensive two fluid model simulation of critical two-phase flow through short tube orifices 

    Javidmand, Puya; Hoffmann, Klaus A. (American Society of Mechanical Engineers, 2015)
    Small-diameter tubes are utilized widely as expansion devices in refrigeration systems. They are employed in either kinds of short-tube orifices or long capillary tubes. Performance of these tubes is reliant upon critical ...
  • Constrained and unconstrained propeller blade optimization 

    Dorfling, Johann; Rokhsaz, Kamran (American Institute for Aeronautics and Astronautics, Inc., 2014-01-17)
    Propeller optimization by means of calculus of variations is addressed in this paper. A procedure for deriving the Euler-Lagrange equations for both unconstrained and constrained propeller blade twist optimization is ...
  • Constrained and unconstrained propeller blade optimization 

    Dorfling, Johann; Rokhsaz, Kamran (American Institute of Aeronautics and Astronautics, 2015-07)
    Propeller optimization by means of calculus of variations is addressed in this paper. A procedure for deriving the Euler-Lagrange equations for both unconstrained and constrained propeller blade-twist optimization is ...
  • Crack propagation analysis using acoustic emission sensors for structural health monitoring systems 

    Kral, Zachary Tyler; Horn, Walter J.; Steck, James E. (Hindawi Publishing Corporation, 2013)
    Aerospace systems are expected to remain in service well beyond their designed life. Consequently, maintenance is an important issue. A novel method of implementing artificial neural networks and acoustic emission sensors ...
  • Demand-side energy management by use of a Design-then-Approximate controller for aggregated thermostatic loads 

    Ghanavati, Meysam; Chakravarthy, Animesh (IEEE, 2015)
    This paper presents a method to design a controller for a system of aggregated thermostatic loads (TCLs) that are represented by two coupled Partial Differential Equations - the Fokker-Planck Equations. The design goal is ...
  • Detached eddy investigation of cavity resonance phenomenon in slender cavities 

    Syed, Shoeb Ahmed; Hoffmann, Klaus A. (AMER INST AERONAUTICS ASTRONAUTICS, 2013-05)
    Aerodynamic noise generation due to the presence of surface discontinuity has been a topic of research for more than five decades. Most investigations carried out are on cavities ranging from small gaps to large cavities ...
  • Development of a high-order solver for blood flow 

    Khurshid, Hassan; Hoffmann, Klaus A. (Springer International Publishing AG, 2015-01)
    A high-order solver for the blood flow is developed and analyzed using a two-dimensional backward-facing step. In the first part, a Newtonian steady code to solve the incompressible Navier-Stokes (N-S) equations has been ...
  • Dynamics and performance of tailless micro aerial vehicle with flexible articulated wings 

    Paranjape, Aditya A.; Chung, Soon-Jo; Hilton, Harry H.; Chakravarthy, Animesh (The American Institute of Aeronautics and Astronautics, 2012-05-05)
    The purpose of this paper is to analyze and discuss the performance and stability of a tailless micro aerial vehicle with flexible articulated wings. The dihedral angles can be varied symmetrically on both wings to control ...
  • Editorial: Message from SAMPE's global president 

    Vizzini, Anthony (SAMPE Publishers, 2014-11)
    I have been a member of SAMPE for 27 years. During that time, my professional network and my participation in the society has grown. I began by going to local chapter meetings, then I went to conferences in the United ...
  • Editorial: Message from SAMPE's global president 

    Vizzini, Anthony (SAMPE Publishers, 2014-07)
    A message from SAMPE'S global president: The last time I wrote this note, I was ending my tenure as the International President of SAMPE. I am now writing as the Global President of SAMPE. So much has occurred in the world ...
  • Editorial: Message from SAMPE's global president 

    Vizzini, Anthony (SAMPE Publishers, 2014-09)
    SAMPE was born among nine individuals working in the aerospace industry in Southern California, a likely place in 1944 for rising concerns on the lack of focus on materials and processing within their industry. It was ...
  • Editorial: Message from SAMPE's global president 

    Vizzini, Anthony (SAMPE Publishers, 2015-05)
    One key thing I learned in SAMPE is to always recognize that another colleague has something to contribute. Ours is an experience-heavy profession. We cannot experience the entirety of our world. Thus, others are always ...
  • Editorial: Message from SAMPE's global president 

    Vizzini, Anthony (SAMPE Publishers, 2015-01)
    I grew up in SAMPE during the '90s when the glamour of the past was a constant reminder of what had been and in the 00s when the very essence of SAMPE was in peril. Individuals took action and saved our society. In the ...
  • Editorial: Message from SAMPE's global president 

    Vizzini, Anthony (SAMPE Publishers, 2015-03)
    If it has not been apparent through this column, SAMPE has been a significant part of my professional career. Consequently, it has also been a significant part of my life. SAMPE helped me to establish my academic credentials ...
  • Effect of dents on crack growth in aluminum alloy under constant-amplitude loading 

    Smith, Bert; Shivalli, Praveen; Kumar, Brijesh (AMER INST AERONAUT ASTRONAUT, 2012-03)
    The purpose of this study was to determine the effect of dents on the stable crack growth in 0.04-in.-thick 2024-T3 bare aluminum sheet. The test specimens were either pristine, dented, or reworked. The edge-cracked ...