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Description
This document highlights the increased involvement of “ college boys ” or “ white college boys ” - better-educated middle-class white and light-skinned persons - in steelbands in the late 1940s and early 1950s. Following an introductory overview of the demography of Trinidad and Tobago, the history of Carnival, and the interregnum of the temporary instruments used between the ban of indigenous drums in the 1880s and the invention of the steelpan at the end of the 1930s, this document will examine the history and membership of these college boy bands, with particular emphasis on the Hit Paraders. Two factors that highlight the vital role played by these college boy steelbands are discussed: commercial sponsorship of bands, and support that bands received from the People's National Movement Party. A detailed timeline of steelpan invention and innovations is also included.
ContributorsDeLamater, Elizabeth (Author) / Smith, Jeffery B (Thesis advisor) / Sunkett, Mark (Committee member) / Bush, Jeff (Committee member) / Hackbarth, Glenn (Committee member) / Solís, Ted (Committee member) / Arizona State University (Publisher)
Created2011
Description
Widespread knowledge of fracture mechanics is mostly based on previous models that generalize crack growth in materials over several loading cycles. The objective of this project is to characterize crack growth that occurs in titanium alloys, specifically Grade 5 Ti-6Al-4V, at the sub-cycle scale, or within a single loading cycle. Using scanning electron microscopy (SEM), imaging analysis is performed to observe crack behavior at ten loading steps throughout the loading and unloading paths. Analysis involves measuring the incremental crack growth and crack tip opening displacement (CTOD) of specimens at loading ratios of 0.1, 0.3, and 0.5. This report defines the relationship between crack growth and the stress intensity factor, K, of the specimens, as well as the relationship between the R-ratio and stress opening level. The crack closure phenomena and effect of microcracks are discussed as they influence the crack growth behavior. This method has previously been used to characterize crack growth in Al 7075-T6. The results for Ti-6Al-4V are compared to these previous findings in order to strengthen conclusions about crack growth behavior.
ContributorsNazareno, Alyssa Noelle (Author) / Liu, Yongming (Thesis director) / Jiao, Yang (Committee member) / Mechanical and Aerospace Engineering Program (Contributor) / Barrett, The Honors College (Contributor)
Created2018-05
Description
Cellular metamaterials arouse broad scientific interests due to the combination of host material and structure together to achieve a wide range of physical properties rarely found in nature. Stochastic foam as one subset has been considered as a competitive candidate for versatile applications including heat exchangers, battery electrodes, automotive, catalyst devices, magnetic shielding, etc. For the engineering of the cellular foam architectures, closed-form models that can be used to predict the mechanical and thermal properties of foams are highly desired especially for the recently developed ultralight weight shellular architectures. Herein, for the first time, a novel packing three-dimensional (3D) hollow pentagonal dodecahedron (HPD) model is proposed to simulate the cellular architecture with hollow struts. An electrochemical deposition process is utilized to manufacture the metallic hollow foam architecture. Mechanical and thermal testing of the as-manufactured foams are carried out to compare with the HPD model. Timoshenko beam theory is utilized to verify and explain the derived power coefficient relation. Our HPD model is proved to accurately capture both the topology and the physical properties of hollow stochastic foam. Understanding how the novel HPD model packing helps break the conventional impression that 3D pentagonal topology cannot fulfill the space as a representative volume element. Moreover, the developed HPD model can predict the mechanical and thermal properties of the manufactured hollow metallic foams and elucidating of how the inevitable manufacturing defects affect the physical properties of the hollow metallic foams. Despite of the macro-scale stochastic foam architecture, nano gradient gyroid lattices are studied using Molecular Dynamics (MD) simulation. The simulation result reveals that, unlike homogeneous architecture, gradient gyroid not only shows novel layer-by-layer deformation behavior, but also processes significantly better energy absorption ability. The deformation behavior and energy absorption are predictable and designable, which demonstrate its highly programmable potential.
ContributorsDai, Rui (Author) / Nian, Qiong (Thesis advisor) / Jiao, Yang (Committee member) / Kwon, Beomjin (Committee member) / Liu, Yongming (Committee member) / Phelan, Patrick (Committee member) / Arizona State University (Publisher)
Created2021
ContributorsDeLamater, Elizabeth (Director) / Pan Devils Steel Band (Performer) / ASU Library. Music Library (Publisher)
Created2008-11-25
ContributorsDeLamater, Elizabeth (Director) / Contemporary Percussion Ensemble (Performer) / Pan Devils Steel Band (Performer) / ASU Library. Music Library (Publisher)
Created2010-12-03
ContributorsDeLamater, Elizabeth (Director) / Moio, Dom (Performer) / Pan Devils Steel Band (Performer) / ASU Library. Music Library (Publisher)
Created2011-04-22
ContributorsSmith, J. B., 1957- (Director) / Sunkett, Mark, 1949- (Director) / Branch, Sonja D. (Director) / DeLamater, Elizabeth (Director) / Pan Devils Steel Band (Performer) / African Drum Ensemble (Performer) / Percussion Jazz Ensemble (Performer) / Contemporary Percussion Ensemble (Performer) / ASU Library. Music Library (Publisher)
Created2008-03-22
ContributorsSmith, J. B., 1957- (Director) / Mancuso, Simone (Director) / Sunkett, Mark, 1949- (Director) / Branch, Sonja (Director) / DeLamater, Elizabeth (Director) / Pan Devils Steel Band (Performer) / African Drum Ensemble (Performer) / Percussion Jazz Ensemble (Performer) / Contemporary Percussion Ensemble (Performer) / ASU Library. Music Library (Publisher)
Created2010-03-27
ContributorsSmith, J. B., 1957- (Director) / Mancuso, Simone (Director) / Sunkett, Mark, 1949- (Director) / DeLamater, Elizabeth (Director) / Pan Devils Steel Band (Performer) / African Drum Ensemble (Performer) / Percussion Jazz Ensemble (Performer) / Contemporary Percussion Ensemble (Performer) / ASU Library. Music Library (Publisher)
Created2011-04-02
ContributorsDeLamater, Elizabeth (Director) / Pan Devils Steel Band (Performer) / ASU Library. Music Library (Publisher)
Created2008-04-18