A Post-Impact Behavior Of Platelet-Based Composites Produced By Compression Molding,
2020
Old Dominion University
A Post-Impact Behavior Of Platelet-Based Composites Produced By Compression Molding, Christopher Eugene Ervin Volle
Mechanical & Aerospace Engineering Theses & Dissertations
Prepreg-based Platelet Molded Compounds (PPMCs) are quickly becoming a widely used method for creating structural components in the aerospace and automotive industries. The discontinuous nature of the platelets used allow good formability of both complex and basic structural components; from seats on commercial airplanes to outer panels of vehicles.
This thesis will look at an important research question of these composites: how PPMCs behave under dynamic loading, e.g. impact and post-impact behavior. Impact is analyzed using recorded force and velocity data to find the absorbed energy. Digital image correlation is used with compression after impact testing to study the propagation …
A Study Of The Aeroacoustics Of Swept Propellers For Small Unmanned Aerial Vehicles,
2020
Old Dominion University
A Study Of The Aeroacoustics Of Swept Propellers For Small Unmanned Aerial Vehicles, Arthur David Wiedemann
Mechanical & Aerospace Engineering Theses & Dissertations
In recent years, small unmanned aerial vehicles (UAVs) have increased in availability and use in both public and commercial sectors. This increased use of small UAVs or “drones” has the unfortunate consequence of introducing excessive noise into communities where they operate. Implementation of noise reduction methods is necessary if we wish to see expanded use of drones in public areas. With electric propulsion, the primary source of noise is the rotor/propeller used in contemporary multi-rotor configurations. In this thesis, the aerodynamics and acoustic behavior of various swept propellers is examined with computational and experimental methods.
A family of propeller geometries …
Mission Architecture Analysis: Exploring Long-Period Comets From Multiple Staging Orbits,
2020
Western Michigan University
Mission Architecture Analysis: Exploring Long-Period Comets From Multiple Staging Orbits, Gabriel Prescinotti Vivan
Masters Theses
Objects that have retained pieces of information about the early Solar System are key to our understanding of its formation and evolutionary history. However, the high delta-V required to reach these objects, such as long-period comets or interstellar objects, makes designing an intercept mission at the time of detection impractical. In this thesis, multiple heliocentric staging orbits are explored to serve as departure positions for future missions, prior to objects’ detections. By utilizing more than one staging orbit concurrently, the set of objects that are reachable is expanded, therefore increasing mission feasibility. Delta-V maps are generated and superimposed; two-impulse burn …
An Argument Against Satellite Resiliency: Simplicity In The Face Of Modern Satellite Design,
2020
Air Force Institute of Technology
An Argument Against Satellite Resiliency: Simplicity In The Face Of Modern Satellite Design, Dax Linville, Robert A. Bettinger
Faculty Publications
The US Air Force and the wider US government rely heavily on space-based capabilities in various orbital regimes to project national security and sovereignty. However, these capabilities are enabled by the design, launch, and operation of satellites produced with a design methodology that favors large, monolithic, and technologically exquisite space systems. Despite the ability for these satellites to provide enduring and resilient capabilities, they suffer from a woefully long acquisition process that debilitates any prospect of rapid satellite reconstitution in the event of a space war.
Hybrid Non-Destructive Assessment For Flow Induced Vibration Piping Systems Using Coupled Fluid-Structure Interaction,
2020
Universiti Malaya
Hybrid Non-Destructive Assessment For Flow Induced Vibration Piping Systems Using Coupled Fluid-Structure Interaction, Keen Kuan Kong
Student Works (2020-2029)
Pipelines and piping systems are of great importance in many industries such as water supply, petroleum and petrochemicals and nuclear power generation. They provide transport for high-velocity pressurized fluids operating under time-varying conditions. They are required to operate non-stop for a schedule of 24 hours a day, 7 days a week. Piping vibration failures have been one of the major causes of downtime, fires and explosions in industrial plant over the past 30 years. Failure of piping systems can have disastrous effects, leading to injuries and fatalities as well as to substantial cost to industry and the environment. Flow-induced vibration …
Automation Of Process Planning For Automated Fiber Placement,
2020
University of South Carolina
Automation Of Process Planning For Automated Fiber Placement, Joshua A. Halbritter
Theses and Dissertations
Process planning represents an essential stage of the Automated Fiber Placement (AFP) workflow. It develops useful and efficient machine processes based upon the working material, composite design, and manufacturing resources. The current state of process planning requires a high degree of interaction from the process planner and could greatly benefit from increased automation. Therefore, a list of key steps and functions are created to identify the more difficult and time-consuming phases of process planning. Additionally, a set of metrics must exist by which to evaluate the effectiveness of the manufactured laminate from the machine code created during the Process Planning …
Analysis Of Training Programs For The Training Of Air Traffic Controllers For Determining The Field Of Digitization,
2020
Tashkent State Technical University
Analysis Of Training Programs For The Training Of Air Traffic Controllers For Determining The Field Of Digitization, Sabohat Shukurova, Z.Z. Shamsiev, A. Sterenharz
Technical science and innovation
The article emphasizes the high demands that are put forward to the professional knowledge and skills of air traffic controllers. Attention is drawn to ICAO's civil aviation training policy, which supports the human resource development strategies developed by Member States and the aviation community and provides access to a sufficient number of qualified and competent professionals. Based on this, the feasibility of research and improvement of the educational process of training air traffic controllers is substantiated. As a research method, the collection, processing and analysis of statistical data is used. As the subject of the study, educational programs for the …
Launch Vehicle Design For The Far-Mars Competition,
2020
Embry-Riddle Aeronautical University
Launch Vehicle Design For The Far-Mars Competition, Matthew Boban, Bryce Smoldon, Jonathan Noble, Stefan Johnson, Maxwell Kauker, Nicholas Wright, Andrew Lucka
Discovery Day - Prescott
Zenith Propulsion is constructing a launch vehicle, named Altair, to compete in a competition hosted by the Friends of Amateur Rocketry (FAR) and the Mars Society. The objective for Zenith Propulsion is to design, build and launch Altair to a qualifying altitude of 30,000 feet in the FAR-Mars competition. Altair will utilize a rocket engine that has been in development at Embry-Riddle Aeronautical University’s Prescott campus since late 2018. This engine, named Janus, uses liquid oxygen and Jet-A and is designed to deliver 1000 lbf of thrust. Altair will be launched from the FAR launch site, in Mojave, CA, on …
Space And Defense – Volume Eleven – Number One – Spring 2019,
2020
University of Nebraska at Omaha
Space And Defense – Volume Eleven – Number One – Spring 2019, Space And Defense Journal
Space and Defense
No abstract provided.
Space And Defense – Volume Nine – Number One – Spring 2016,
2020
University of Nebraska at Omaha
Space And Defense – Volume Nine – Number One – Spring 2016, Space And Defense Journal
Space and Defense
No abstract provided.
Space And Defense – Volume Eight – Number One – Spring 2015,
2020
University of Nebraska at Omaha
Space And Defense – Volume Eight – Number One – Spring 2015, Space And Defense Journal
Space and Defense
No abstract provided.
Space And Defense – Volume Seven – Number One – Winter 2014,
2020
University of Nebraska at Omaha
Space And Defense – Volume Seven – Number One – Winter 2014, Space And Defense Journal
Space and Defense
No abstract provided.
Space And Defense – Volume Six – Number One – Fall 2012,
2020
University of Nebraska at Omaha
Space And Defense – Volume Six – Number One – Fall 2012, Space And Defense Journal
Space and Defense
No abstract provided.
Space And Defense – Volume Five – Number One – Summer 2011,
2020
University of Nebraska at Omaha
Space And Defense – Volume Five – Number One – Summer 2011, Space And Defense Journal
Space and Defense
No abstract provided.
Space And Defense – Volume Four – Number Two – Summer 2010,
2020
University of Nebraska at Omaha
Space And Defense – Volume Four – Number Two – Summer 2010, Space And Defense Journal
Space and Defense
No abstract provided.
Space And Defense – Volume Four – Number One – Winter 2010,
2020
University of Nebraska at Omaha
Space And Defense – Volume Four – Number One – Winter 2010, Space And Defense Journal
Space and Defense
No abstract provided.
Space And Defense – Volume Three – Number Two – Fall 2009,
2020
University of Nebraska at Omaha
Space And Defense – Volume Three – Number Two – Fall 2009, Space And Defense Journal
Space and Defense
No abstract provided.
Space And Defense – Volume Three – Number One – Summer 2009,
2020
University of Nebraska at Omaha
Space And Defense – Volume Three – Number One – Summer 2009, Space And Defense Journal
Space and Defense
No abstract provided.
Space And Defense – Volume Two – Number Three – Winter 2009,
2020
University of Nebraska at Omaha
Space And Defense – Volume Two – Number Three – Winter 2009, Space And Defense Journal
Space and Defense
No abstract provided.
Space And Defense – Volume Two – Number Two – Winter 2008,
2020
University of Nebraska at Omaha
Space And Defense – Volume Two – Number Two – Winter 2008, Space And Defense Journal
Space and Defense
No abstract provided.
