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Full-Text Articles in Mechanical Engineering
Phase Tunable Holographic Fabrication For Three-Dimensional Photonic Crystal Templates By Using A Single Optical Element, Di Xu, Kevin P. Chen, Ahmad Harb, Daniel Rodriguez, Karen Lozano, Yuankun Lin
Phase Tunable Holographic Fabrication For Three-Dimensional Photonic Crystal Templates By Using A Single Optical Element, Di Xu, Kevin P. Chen, Ahmad Harb, Daniel Rodriguez, Karen Lozano, Yuankun Lin
Mechanical Engineering Faculty Publications and Presentations
This paper demonstrates a phase tunable holographic fabrication of three-dimensional photonic lattice structures using a single optical element. A top-cut four-side prism is employed to generate five-beam three-dimensional interference patterns. A silica glass slide is inserted into the optical path to adjust the phase of one interfering beam relative to other four beams. The phase control of the interfering laser beam renders the lattice of the interference pattern from a face-center tetragonal symmetry into a high contrast, interconnecting diamondlike symmetry. This method provides a flexible approach to fabricating three-dimensional photonic lattices with improved photonic band structures.
Investigation Of The Electromagnetic Interference Shielding Of Titanium Carbide Coated Nanoreinforced Liquid Crystalline Polymer, Karen Lozano, Lesly Espinoza, K. Hernandez, Ananta R. Adhikari, Gangaram Radhakrishnan, P. M. Adams
Investigation Of The Electromagnetic Interference Shielding Of Titanium Carbide Coated Nanoreinforced Liquid Crystalline Polymer, Karen Lozano, Lesly Espinoza, K. Hernandez, Ananta R. Adhikari, Gangaram Radhakrishnan, P. M. Adams
Mechanical Engineering Faculty Publications and Presentations
The development and analysis of electrical and electromagnetic interference shielding effectiveness of titanium carbide (TiC)-coated carbon nanofiber (CNF) reinforced liquid crystalline polymer composites are presented. The studied samples consisted of different weight percentages (5, 10, and 15 wt %) of CNFs distributed and dispersed homogeneously within the polymeric matrix. A titanium carbide layer was deposited using pulsed laser deposition, and was conducted at room temperature, which eliminated possible thermal degradation of the polymer matrix. The effect of the thickness of the TiC layer on the electrical properties of the polymeric composites was analyzed. A synergistic behavior between the TiC coating …
Analysis Of Flux-Base Fins For Estimation Of Heat Transfer Coefficient, Kevin D. Cole, Constantine Tarawneh, Brent M. Wilson
Analysis Of Flux-Base Fins For Estimation Of Heat Transfer Coefficient, Kevin D. Cole, Constantine Tarawneh, Brent M. Wilson
Mechanical Engineering Faculty Publications and Presentations
Exact solutions are given for the transient temperature in flux-base fins with the method of Green’s functions (GF) in the form of infinite series for three different tip conditions. The speed of convergence is improved by replacing the steady part by a closed-form steady solution. For the insulated-tip case, a quasi-steady solution is presented. Numerical values are presented and the conditions under which the quasi-steady solution is accurate are determined. An experimental example is given for estimation of the heat transfer coefficient (HTC) on a non-rotating roller bearing, in which the outer bearing race is treated as a transient fin.