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- All Subjects: Creative Project
- All Subjects: Mechanical Engineering
- Creators: School of International Letters and Cultures
- Creators: Oswald, Jay
Description
Shock loading is a complex phenomenon that can lead to failure mechanisms such as strain localization, void nucleation and growth, and eventually spall fracture. Studying incipient stages of spall damage is of paramount importance to accurately determine initiation sites in the material microstructure where damage will nucleate and grow and to formulate continuum models that account for the variability of the damage process due to microstructural heterogeneity. The length scale of damage with respect to that of the surrounding microstructure has proven to be a key aspect in determining sites of failure initiation. Correlations have been found between the damage sites and the surrounding microstructure to determine the preferred sites of spall damage, since it tends to localize at and around the regions of intrinsic defects such as grain boundaries and triple points. However, considerable amount of work still has to be done in this regard to determine the physics driving the damage at these intrinsic weak sites in the microstructure. The main focus of this research work is to understand the physical mechanisms behind the damage localization at these preferred sites. A crystal plasticity constitutive model is implemented with different damage criteria to study the effects of stress concentration and strain localization at the grain boundaries. A cohesive zone modeling technique is used to include the intrinsic strength of the grain boundaries in the simulations. The constitutive model is verified using single elements tests, calibrated using single crystal impact experiments and validated using bicrystal and multicrystal impact experiments. The results indicate that strain localization is the predominant driving force for damage initiation and evolution. The microstructural effects on theses damage sites are studied to attribute the extent of damage to microstructural features such as grain orientation, misorientation, Taylor factor and the grain boundary planes. The finite element simulations show good correlation with the experimental results and can be used as the preliminary step in developing accurate probabilistic models for damage nucleation.
ContributorsKrishnan, Kapil (Author) / Peralta, Pedro (Thesis advisor) / Mignolet, Marc (Committee member) / Sieradzki, Karl (Committee member) / Jiang, Hanqing (Committee member) / Oswald, Jay (Committee member) / Arizona State University (Publisher)
Created2013
Description
Recently, the use of zinc oxide (ZnO) nanowires as an interphase in composite materials has been demonstrated to increase the interfacial shear strength between carbon fiber and an epoxy matrix. In this research work, the strong adhesion between ZnO and carbon fiber is investigated to elucidate the interactions at the interface that result in high interfacial strength. First, molecular dynamics (MD) simulations are performed to calculate the adhesive energy between bare carbon and ZnO. Since the carbon fiber surface has oxygen functional groups, these were modeled and MD simulations showed the preference of ketones to strongly interact with ZnO, however, this was not observed in the case of hydroxyls and carboxylic acid. It was also found that the ketone molecules ability to change orientation facilitated the interactions with the ZnO surface. Experimentally, the atomic force microscope (AFM) was used to measure the adhesive energy between ZnO and carbon through a liftoff test by employing highly oriented pyrolytic graphite (HOPG) substrate and a ZnO covered AFM tip. Oxygen functionalization of the HOPG surface shows the increase of adhesive energy. Additionally, the surface of ZnO was modified to hold a negative charge, which demonstrated an increase in the adhesive energy. This increase in adhesion resulted from increased induction forces given the relatively high polarizability of HOPG and the preservation of the charge on ZnO surface. It was found that the additional negative charge can be preserved on the ZnO surface because there is an energy barrier since carbon and ZnO form a Schottky contact. Other materials with the same ionic properties of ZnO but with higher polarizability also demonstrated good adhesion to carbon. This result substantiates that their induced interaction can be facilitated not only by the polarizability of carbon but by any of the materials at the interface. The versatility to modify the magnitude of the induced interaction between carbon and an ionic material provides a new route to create interfaces with controlled interfacial strength.
ContributorsGalan Vera, Magdian Ulises (Author) / Sodano, Henry A (Thesis advisor) / Jiang, Hanqing (Committee member) / Solanki, Kiran (Committee member) / Oswald, Jay (Committee member) / Speyer, Gil (Committee member) / Arizona State University (Publisher)
Created2013
Description
For the Love of the Game is a 15-minute documentary highlighting what the culture of soccer is like in Spain. Filmed completely in Valencia, Spain, this short film shows the actual atmosphere of everyday soccer. People of all ages and backgrounds give depth into what it's like to grow up in Spain with and fall in love with the game.
ContributorsRaboin, Sarandon Grace (Author) / Jacoby, Jim (Thesis director) / Kassing, Jeffrey (Committee member) / School of International Letters and Cultures (Contributor) / Walter Cronkite School of Journalism and Mass Comm (Contributor) / Barrett, The Honors College (Contributor)
Created2021-05
Description
A longing to revisit the people, places, and moments of my past has followed me for years, sometimes affecting me to the extent that the past seems to intrude on my present. In this piece, I wish to turn a critical eye on these feelings of nostalgia and examine how strong emotion can emerge from nothing more than fractured, faded memories. Using footage of moments I had recorded over six months of living in Europe, I seek to sculpt these images from my past into a form that rejects the daze of nostalgia for the fragmented truth of memory. My background is in more traditional narrative filmmaking, and so I was excited to work in this experimental three-screen format, in which I could explore the concept of memory in a manner that felt truer to how I actually experience it. I tested various combinations of imagery in my videos to build the progression of the piece, which I hoped would play out in an associational style that mimicked the process of my own memory. I hope that this will cause people to walk away from the piece thinking about how memory can fuel emotion and even to investigate their own relationship to the past.
ContributorsPowell, Matthew Rhys (Author) / Bradley, Christopher (Thesis director) / Brye, Anne (Committee member) / Barrett, The Honors College (Contributor) / School of International Letters and Cultures (Contributor) / School of Film, Dance and Theatre (Contributor)
Created2015-05
Description
This work aims to give the general public a unique insight into French urban culture through my experience while living and filming a personal documentary in Lyon, France. The goal of the project is to examine and consequently describe what this culture consists of while comparing and contrasting it to our own urban culture. The work depicts the creators and performers of the culture as well as its audience, which differs from our own here in the U.S in part thanks to France's efficient public transportation system, used by people from every social class. Immersing myself in this fascinating world truly helped me get through to the heart of the French people and artists that make up the urban culture in Lyon. Observing performances and daily practices while digging deep into each artist's story allowed me to unravel the identity of this culture one person at a time.
ContributorsGradilla, Cesar Uriel (Author) / Bahtchevanova, Mariana (Thesis director) / Chabaud, Aurélie (Committee member) / Barrett, The Honors College (Contributor) / School of International Letters and Cultures (Contributor)
Created2015-05
Description
The purpose of this thesis was to design a market entrance strategy for Company X to enter the microcontroller (MCU) market within the Internet of Things (IoT). The five IoT segments are automotive; medical; retail; industrial; and military, aerospace, and government. To reach a final decision, we will research the markets, analyze make versus buy scenarios, and deliver a financial analysis on the chosen strategy. Based on the potential financial benefits and compatibility with Company X's current business model, we recommend that Company X enter the automotive segment through mergers & acquisitions (M&A). After analyzing the supply chain structure of the automotive IoT, we advise Company X to acquire Freescale Semiconductor for $46.98 per share.
ContributorsBradley, Rachel (Co-author) / Fankhauser, Elisa (Co-author) / McCoach, Robert (Co-author) / Zheng, Weilin (Co-author) / Simonson, Mark (Thesis director) / Hertzel, Mike (Committee member) / Barrett, The Honors College (Contributor) / Department of Finance (Contributor) / Department of Supply Chain Management (Contributor) / School of Accountancy (Contributor) / School of International Letters and Cultures (Contributor) / WPC Graduate Programs (Contributor)
Created2015-05
Description
Inspired by my own experiences, I began this study to examine students' cultural engagement while studying abroad. Students' motivations to study abroad vastly vary and no two experiences are the same, due to the multitude of factors involved. Study abroad program providers and organizations frequently cite intercultural competence as a vital skill in the 21st century for all young professionals to build, and is often a goal of students to develop through their study abroad experiences. Before departure, some students may have a romanticized, grand vision of integrating themselves in a foreign culture and learning the language. Upon arrival, reality may prove to be quite different and students can get swept up in the novelty of living in a new environment and traveling with their new American friends from the same program. The vision of intercultural competence and foreign language acquisition gradually fades when realizing just how difficult they both are to achieve, especially in such a short time period. My hope is that this study can highlight issues that returned students of study abroad programs faced while abroad and can provide valuable insight for future study abroad participants into how to become more immersed in their host culture. By creating awareness of the merits of intercultural competence and the methods to develop it through study abroad, future students can become better equipped to have a more enriching experience. https://cultureasustudyabroad.wordpress.com/
ContributorsThoesen, Raquel Nathania (Author) / Scott Lynch, Jacquelyn (Thesis director) / Herrera Niesen, Carrie (Committee member) / W. P. Carey School of Business (Contributor) / School of International Letters and Cultures (Contributor) / Barrett, The Honors College (Contributor)
Created2016-05
Description
Iron City Magazine is an online and print journal devoted entirely to writing and art from the prison world. It is our hope that through this creative platform, incarcerated artists and writers find value in their stories, fuel for personal growth, and pride in their accomplishments. Inmates are, first and foremost, people. They own stories worthy of telling and sharing. Iron City Magazine aims to highlight these stories in a way more permanent than a private journal. In addition, we serve to remind the general public that inmates can make meaningful contributions to their communities. So often, this potential is forgotten or overshadowed by their crimes. By validating inmates' humanity through writing and art, we encourage a culture of understanding and transformation.
ContributorsVolin, Natalie Esther (Author) / Wells, Cornelia (Thesis director) / Berry, Shavawn (Committee member) / College of Letters and Sciences (Contributor) / School of International Letters and Cultures (Contributor) / Barrett, The Honors College (Contributor)
Created2016-05
Description
The Roller Derby Club at Arizona State University became a student organization in the fall of 2013. They became a practicing team known as the Derby Devils in the spring of 2014. This project documents the creation and development a collegiate roller derby team as they go from a student organization to an athletic team. Collegiate roller derby is still in its infant stages and therefore the purpose of this project is to provide a guide for future collegiate roller derby teams as well as other athletic teams.
ContributorsLee, Alisa Yulim (Author) / Looser, Devoney (Thesis director) / Hultsman, Wendy (Committee member) / Barrett, The Honors College (Contributor) / School of International Letters and Cultures (Contributor) / Department of Chemistry and Biochemistry (Contributor) / W. P. Carey School of Business (Contributor)
Created2014-12
Description
The process of playwriting is much more than merely writing the script itself; it is a process of outlining, writing, rewriting, and rewriting some more. This project explores that process from the very beginning to the late stages of final rewrites on a full-length, two-act stage play, Forget Me Not. Thematically, the play addresses issues such as legacy, ambition, the limitations of memory, and the complex relationships between women. It also speaks to the possibility of hope and revolves around twenty-something characters who are not nihilistic or pretentious as in the frequently-dominant portrayal of that demographic, but rather witty, intelligent, and layered. The play applies techniques of playwriting with a focus on character development as the element that drives the story, while also playing with conceptions of memory and time through the framing device, structure, and narration. A craft essay follows the script of the play, detailing the process of conceptualizing, writing, and revising the play.
ContributorsPrahl, Amanda Catherine (Author) / Sterling, Pamela (Thesis director) / Campbell, Corey (Committee member) / Jennings-Roggensack, Colleen (Committee member) / Barrett, The Honors College (Contributor) / School of International Letters and Cultures (Contributor) / School of Politics and Global Studies (Contributor) / School of Film, Dance and Theatre (Contributor) / Department of English (Contributor)
Created2015-05