There is a plethora of interesting science and many applications that rely on wrinkling in thin sheets. Though wrinkling may not be appreciated in some instances, in many other situations wrinkles can help to comprehend various physical phenomena. This work reports on the development of materials that can induce surface roughness through the creation of wrinkled surfaces. The textured surfaces are engineered through a bilayer system consisting of poly(dimethylsiloxane) and a modified surface layer. This research sought to study and understand methodologies for the controlled formation of wrinkles on surfaces of structures. The creation of wrinkled surfaces was explored in metal deposited thin films atop PDMS. A series of experiments were designed to investigate the significant material parameters that effect low deformation wrinkling mechanics. In doing so, the experimental bilayer system successfully validated an empirical model. Building upon the understanding of key material parameters that affect low deformation wrinkling, oxidized PDMS was used to extend this knowledge in mechanically perturbed-induced wrinkling. A model was constructed that describes the wrinkle profile in terms of the paramount process parameters of plasma treatment. This feature enables integration of micro/nano-wrinkle manufacturing on large-scales. Finally, wrinkle morphology was controlled in a series of wrinkle patterning experiments. Transformations of various wrinkle patterns was achieved by coordinating the amount/direction of strain exerted on the system and exploiting the strain release process, and also by manipulating the geometric properties. The versatility of wrinkle patterning techniques demonstrates further advances in surface roughness engineering. The impact of this work is aimed at enhancing aerodynamic technologies and capabilities. This study demonstrated that by modifying the PDMS surface to create bilayer systems, the wavelength, amplitude, and surface roughness of the wrinkled films can be effectively controlled. / A Thesis submitted to the Department of Industrial and Manufacturing Engineering in partial fulfillment of the requirements for the degree of Master of Science. / Summer Semester 2015. / July 20, 2015. / Includes bibliographical references. / Okenwa Okoli, Professor Directing Thesis; Tarik Dickens, Committee Member; Zhibin Yu, Committee Member.
| Identifer | oai:union.ndltd.org:fsu.edu/oai:fsu.digital.flvc.org:fsu_253228 |
| Contributors | Daramola, Ebunoluwa (authoraut), Okoli, Okenwa (professor directing thesis), Dickens, Tarik J. (committee member), Yu, Zhibin (committee member), Florida State University (degree granting institution), College of Engineering (degree granting college), Department of Industrial and Manufacturing Engineering Department of Industrial and Manufacturing Engineering (degree granting department) |
| Publisher | Florida State University, Florida State University |
| Source Sets | Florida State University |
| Language | English, English |
| Detected Language | English |
| Type | Text, text |
| Format | 1 online resource (69 pages), computer, application/pdf |
| Rights | This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). The copyright in theses and dissertations completed at Florida State University is held by the students who author them. |
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