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Description
This thesis encompasses research performed in the focus area of structural health monitoring. More specifically, this research focuses on high velocity impact testing of carbon fiber reinforced structures, especially plates, and evaluating the damage post-impact. To this end, various non-destructive evaluation techniques such as ultrasonic C-scan testing and flash thermography were utilized for post-impact analysis. MATLAB algorithms were written and refined for the localization and quantification of damage in plates using data from sensors such as piezoelectric and fiber Bragg gratings sensors. Throughout the thesis, the general plate theory and laminate plate theory, the operations and optimization of the gas gun, and the theory used for the damage localization algorithms will be discussed. Additional quantifiable results are to come in future semesters of experimentation, but this thesis outlines the framework upon which all the research will continue to advance.
ContributorsMccrea, John Patrick (Author) / Chattopadhyay, Aditi (Thesis director) / Borkowski, Luke (Committee member) / Barrett, The Honors College (Contributor) / Mechanical and Aerospace Engineering Program (Contributor) / Department of Military Science (Contributor)
Created2015-05
Description
This paper describes the research done to attempt to scale up thrusts produced by ionic wind thrusters, or "lifters" to magnitudes needed to power a 2 kg hobbyist remote-control airplane. It includes background information on the Biefeld-Brown effect and the thrust it produces, an experiment that attempted to prove that thrust can be scaled up from smaller ionic wind thrusters to larger scales, and two models predicting thruster geometries and power sources needed to reach these thrusts. An ionic wind thruster could not be created that would power the hobbyist remote as a high-voltage power source with voltage and power high enough could not be obtained. Thrusters were created for the experiment using balsa wood, aluminum foil, and thin copper wire, and were powered using a 30 kV transformer. The thrusters attempted to test for correlations between thrust, electrode length, and current; electric field strength, and thrust; and thrust optimization through opening up air flow through the collector electrode. The experiment was inconclusive as all the thrusters failed to produce measurable thrust. Further experimentation suggests the chief failure mode is likely conduction from the collector electrode to the nearby large conductive surface of the scale.
ContributorsHaug, Andrew James (Author) / White, Daniel (Thesis director) / Takahashi, Timothy (Committee member) / Middleton, James (Committee member) / Mechanical and Aerospace Engineering Program (Contributor) / Department of Military Science (Contributor) / Barrett, The Honors College (Contributor)
Created2017-12
Description
Transportation around campus on time is crucial for in-person college students looking to succeed in their studies. Unfortunately, inequities have arisen between the ability of able-bodied students to get to and from class and permanently or temporarily disabled students looking to do the same. ASU’s solution to this problem, the Disability Access and Resource Transportation (DART) service, does not adequately address the needs of its targeted customers properly. Unfortunately, student surveys and anecdotal evidence from students’ lived experiences have demonstrated that DART often leaves students waiting for more than half an hour for a ride, causes students to miss class, and is altogether unreliable in today’s age where punctuality is key to success. Our goal in our thesis project was to create an equal on-campus transportation playing field for students with and without mobility issues so that a students’ ability to get around campus would never serve as a hindrance to his/her ability to, at a minimum, earn a degree; ideally empowering all students to thrive regardless of their personal circumstances.
ContributorsHabelt, Mark (Author) / Lu, Sharon (Co-author) / Pham, Benjamin (Co-author) / Vohs, Grace (Co-author) / Byrne, Jared (Thesis director) / Thomasson, Anna (Committee member) / Larson, Wiley (Committee member) / Barrett, The Honors College (Contributor) / School of Politics and Global Studies (Contributor) / Department of Military Science (Contributor) / School of International Letters and Cultures (Contributor)
Created2022-05