Recent Submissions

  • CubeSat Formations for Monitoring Hurricanes 

    Chadalavada, Pardhasai; Dutta, Atri (IEEE, 2022-08-10)
    Recent technological advancements have enabled distributed sensing of major weather events such as hurricanes using CubeSats. This paper proposes three novel formation flying concepts of operations to improve the hurricane ...
  • Preliminary wind tunnel survey results for a vortex generated by a flat plate 

    Kuenn, Aaron D.; Kliment, Linda K. (American Institute of Aeronautics and Astronautics, 2022-06-20)
    Preliminary results of wingtip vortex surveys in the midfield wake of a flat plate wing of with AR = 6 at Rec between 1.7 x 105 and 2.6 x 105 are presented. Wake surveys using a conventional 7-hole probe were conducted at ...
  • Flight loads analysis of CL-415 scoopers 

    Rokhsaz, Kamran; Kliment, Linda K.; Nelson, John A. (American Institute of Aeronautics and Astronautics, Inc., 2022-06-20)
    Flight data recorded between 2015 and 2019 on a fleet of four CL-415 aircraft has been analyzed for the purpose of developing flight loads spectra. A low-pass filter has been used to remove the effects of local and structural ...
  • Examination of derived gust velocities from C-130 in forest service operation 

    Kliment, Linda K.; Rokhsaz, Kamran; Ali, Syed Junaid; Nelson, John A. (American Institute of Aeronautics and Astronautics, Inc., 2022-06-20)
    Flight data from two EC-130Q and two L-382G airframes being flown as airtankers in USFS operations were analyzed. Firefighting flights were separated into five phases: cruise 1, entry, drop, exit, and cruise 2. The recorded ...
  • Preliminary examination of C-130 flight loads in aerial firefighting operations 

    Kliment, Linda K.; Rokhsaz, Kamran; Ali, Syed Junaid; Nelson, John A. (American Institute of Aeronautics and Astronautics, Inc., 2022-06-20)
    In-flight recorded data from two EC-130Q and two L-382G aircraft have been used to analyze their flight loads while flown as aerial firefighters. The data was collected over the calendar years 2016-2019 and consisted of ...
  • Study of CL-415 usage in forest service operation 

    Kliment, Linda K.; Rokhsaz, Kamran; Nelson, John A. (American Institute of Aeronautics and Astronautics, Inc., 2022-06-20)
    Results of analyzing airframe usage from a fleet of four CL-415 Super Scooper aircraft flown in support of the United States Forest Service aerial firefighting operations are reported. Data used for this report was collected ...
  • Design of deep neural networks for transfer time prediction of spacecraft electric orbit-raising 

    Mughal, Ali Hassaan; Chadalavada, Pardhasai; Munir, Arslan; Dutta, Atri; Qureshi, Mahmood Azhar (Elsevier Ltd, 2022-09-01)
    Recently, there has been a surge in use of electric propulsion to transfer satellites to the geostationary Earth orbit (GEO). Traditionally, the transfer times to reach GEO using all-electric propulsion are obtained by ...
  • Sound absorption and transmission loss properties of open-celled aluminum foams with stepwise relative density gradients 

    Lomte, Amulya; Sharma, Bhisham N.; Drouin, Mary; Schaffarzick, Denver (Elsevier Ltd, 2022-05-01)
    We investigate the acoustical properties of uncompressed and compressed open-celled aluminum metal foams fabricated using a directional solidification foaming process. We compressed the fabricated foams using a hydraulic ...
  • An efficient algorithm for the longitude-targeted ascent of all-electric satellites 

    Chadalavada, Pardhasai; Dutta, Atri; Ghosh, Pradipto (AIAA SCITECH, 2021-12-29)
    This paper considers the ascent-to-slot problem of an electrically propelled geostationary satellite. In contrast to the widely-studied electric orbit transfer problem, the present work is concerned about the rendezvous ...
  • Alternate method for determining yield strength of polymer additive manufacturing 

    Park, Chul Y.; Rupel, Keith E.; Henry, Chelsey E.; Malik, Kevin F.; Ghose, Sayata; Palliyaguru, Upul R. (ASTM International, 2020-09-01)
    Additive manufacturing (AM) technology offers potential cost savings, production efficiencies, and unique design features that cannot be easily achieved through traditional manufacturing. However, it is known that the final ...
  • Regional CubeSat constellation design to monitor hurricanes 

    Chadalavada, Pardhasai; Dutta, Atri (IEEE, 2021-11-13)
    State-of-the-art weather forecasting systems depend on a variety of data collected by airborne, orbiting, and ground sensors. Regional CubeSat constellations have the potential to improve hurricane forecasting by collecting ...
  • Low-frequency noise control using layered granular aerogel and limp porous media 

    Xue, Yutong; Dasyam, Amrutha; Bolton, J. Stuart; Sharma, Bhisham N. (Institute of Noise Control Engineering, 2021-08-01)
    The acoustic absorption of granular aerogel layers with a granule sizes in the range of 2 to 40 μm is dominated by narrow-banded, high absorption regions in the low-frequency range and by reduced absorption values at higher ...
  • 3D printed multifunctional low-frequency sound absorbers 

    Johnston, William; Kankanamalage, Pulitha G.; Sharma, Bhisham N. (Institute of Noise Control Engineering, 2021-08-01)
    Cellular porous materials are an attractive choice for lightweight structural design. However, though their open porous architecture is ideally suited for multifunctional applications, their use is typically limited by the ...
  • Coupled analysis of low-velocity impact damage and compression after impact strength of composite laminates 

    Borkowski, Luke B.; Kumar, Rajesh S.Dinesh; Palliyaguru, Upul R. (American Society of Civil Engineers, 2021-09)
    A coupled analysis of impact damage and compression-after-impact (CAI) strength of laminated composite plates was conducted using efficient analytical and semianalytical models with the goal of demonstrating and validating ...
  • In-plane shear response of a composite hexagonal honeycomb core under large deformation – A numerical and experimental study 

    Shahverdi Moghaddam, Hooman; Keshavanarayana, Suresh R.; Ivanov, Dmitry S.; Yang, Chihdar Charles; Horner, Allison L. (Elsevier, 2021-07-15)
    In the present work, experimental shear tests using a custom-built picture-frame shear fixture have been conducted to investigate the in-plane pure-shear response of an HRP-C fiberglass/phenolic hexagonal honeycomb core ...
  • Additive manufacturing of fibrous sound absorbers 

    Johnston, William; Sharma, Bhisham N. (Elsevier, 2021-05-01)
    We investigate the possibility of additively manufacturing fibrous sound absorbers using fused deposition modeling. Two methods for 3D printing fibers are proposed. The fiber bridging method involves extruding the filament ...
  • Predictive maintenance on aircraft and applications with digital twin 

    Heim, Sam; Clemens, Jason R.; Steck, James E.; Basic, Christopher; Timmons, David; Zwiener, Kourtney (IEEE, 2021-03-19)
    The concept of predictive maintenance in aiding the manufacturing and operation of equipment is moving several industries forward, allowing for a more detailed description and justification of maintenance routines. This ...
  • Acoustic absorption properties of granular silica aerogels 

    Dasyam, Amrutha; Khaleel, Ola; Sharma, Bhisham N. (Institute of Noise Control Engineering, 2020-10-12)
    Aerogels are a class of synthetic materials derived using supercritical drying to extract the liquid component of a gel and replacing it with a gas. This process results in the formation of an ultra-lightweight nanoporous ...
  • Anisotropic hyperelastic constitutive modeling of in-plane finite deformation responses of commercial composite hexagonal honeycombs 

    Shahverdi Moghaddam, Hooman; Keshavanarayana, Suresh R.; Yang, Chihdar Charles; Horner, Allison L. (SAGE Publications, 2021-02-18)
    This research presents the adaptation of an anisotropic hyperelastic constitutive model for predicting the experimentally observed in-plane, orthotropic, bi-modular and nonlinear-elastic responses of a commercial adhesively ...
  • A comparison of the two and four microphone methods for deriving the characteristic acoustic properties of porous materials 

    Lomte, Amulya; Wojciechowski, Brittany; Sharma, Bhisham (Institute of Noise Control Engineering, 2020-10-12)
    The characteristic acoustic impedance and wave number of a porous material can be derived using either a two microphone or a four microphone impedance tube setup. For the four microphone method, these complex properties ...

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