EB3 3235 | Mechanical and Aerospace Engineering EB3 3235 | Mechanical and Aerospace Engineering

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EB3 3235

August 2016

MAE PhD Defense – Tzu-Hsuan Chang

August 15, 2016 @ 1:00 pm

Title: In-situ Scanning Electron Microscopy Mechanical Characterization of Crystalline Nanowires using MEMS Devices (Advisor:  Dr. Young Zhu) Date: August 15, 2016 Time & Location: 1:00 PM EB3 - 3235 ABSTRACT The nanostructures such as nanowires (NWs) are important building blocks for a broad spectrum of nanotechnology applications. Therefore, it is of important to accurately characterize their mechanical response. Microelectromechanical systems (MEMS) are the reliable platform while performing the in-situ characterization of nanostructure. In this thesis, we conduct the MEMS tensile stage to…

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October 2016

MAE PhD Defense – Guangming Cheng

October 20, 2016 @ 9:30 am

Title: In situ Investigation of Deformation Mechanisms in Crystalline Nanowires  (Advisor:  Dr. Yong Zhu) Date: October 20, 2016 Time & Location: 9:30 AM EB3 – 3235 B ABSTRACT Nanowires (NWs) are among the most important building blocks of bottom-up nanotechnologies, which has increased the need for the investigation of their mechanical properties and deformation behaviors. In this thesis, we focus on the mechanical behaviors of types of NWs, SiC, Ag and ZnO NWs, including fracture mechanism of SiC NWs, deformation mechanism in…

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March 2017

MAE PhD Defense – Kyle Thompson

March 17, 2017 @ 2:30 pm

Aerothermodynamic Design Sensitivities for a Reacting Gas Flow Solver on an Unstructured Mesh Using a Discrete Adjoint Formulation. (Advisor:  Dr. Hassan Hassan) Biography Kyle Bonner Thompson was born on December 11th, 1990, in Willow Springs, North Carolina. He received a B.S. in Aerospace Engineering from North Carolina State University in 2012, and subsequently received his M.S. in Aerospace Engineering from North Carolina State University in 2014. After receiving his M.S., he began work in the Aerothermodynamics branch of NASA Langley Research…

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MAE PhD Defense – Joong Hee Min

March 20, 2017 @ 9:30 am - 12:30 pm

Title:  Design and Characterization of Thin Metallic Nanostructures for Flexible Transparent Conductors (Advisor:  Dr. Chih-Hao Chang) Date:  March 20, 2017 Time & Location:  9:30 AM-12:30 PM   EB3 - 3235   ABSTRACT There have been numerous interests on developing both flexible and transparent conductors using various fabrication technologies, such as dispersing nanomaterials onto elastomeric substrates, or using pre-strained thin materials which can be stretched and compressed. Another effective technique is atomic layer deposition (ALD), one of the most powerful techniques to…

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June 2017

MAE PhD Defense – Jinwook Kim

June 14, 2017 @ 11:00 am - 1:00 pm

TITLE: Miniaturized Ultrasound Transducers for the Acoustic Excitation of Microbubbles and Microgels (Advisor: Dr. Jiang) DATE: Wednesday, June 14, 2017 TIME & LOCATION: 11 AM   EB3 - 3235   ABSTRACT: Microbubbles and microgels have been widely utilized for both diagnostic and therapeutic ultrasound applications. Owing to their nonlinear characteristics of harmonic responses, coalescence, and cavitation, these microparticles have enabled contrast-enhanced harmonic vascular imaging, spatiotemporal drug-delivery, and enhanced thrombolysis efficiency.  Despite their advantages, a crucial limitation of these microbubble-aided ultrasound techniques…

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October 2017

MAE PhD Defense – Jianxun Cui

October 20, 2017 @ 10:00 am - 12:00 pm

TITLE: Self-folding of Engineering Materials Actuated by Heat Shrinkable Polymers (Advisor: Dr. Zhu) DATE: Friday, October 20, 2017 TIME & LOCATION: 10 AM   EB3 - 3235   ABSTRACT: Shape shifting is an important process for both natural and artificial structures. Animals and plants need to change their shape as a response to environmental stimuli. Some man-made tools also change their shape during the usage. The dissertation focuses on the transformation from 2D sheets to 3D structures. The idea is from origami, an…

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MAE PhD Defense – Che-Yuan Chang

October 26, 2017 @ 10:00 am - 12:00 pm

TITLE: Chirp Signal for Wave Dispersion Relationships and Nonlinear Ultrasonic Damage Imaging ADVISOR: Dr. Fuh-Gwo Yuan DATE & TIME: Thursday, October 26, 2017 at 10 AM LOCATION: EB3 - 3235   ABSTRACT: The aim of this research is to investigate the feasibility of utilizing chirp signal for examining wave dispersion relationships and ultrasonic damage imaging based on linear and nonlinear phenomenon upon isotropic and carbon fiber reinforced polymer (CFRP) plates with a system of piezoelectric transducer (PZT) and laser Doppler vibrometer (LDV). Accurate…

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MAE PhD Defense – Amanda Myers

October 27, 2017 @ 9:00 am - 11:00 am

TITLE: Textile Considerations for Wearable Thermal Energy Harvesting: Knit Structures and Body Mapping ADVISORS: Dr. Jesse Jur & Dr. Larry Silverberg DATE & TIME: Friday, October 27, 2017 at 9 AM LOCATION: EB3 - 3235   ABSTRACT: To improve thermal energy harvesting from the body, a complex set of microclimates, components, and functions must be considered in relation to each other. While much literature on energy harvesting improvements highlights the importance of device and material optimization, little focus has been geared towards improving the…

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MAE PhD Defense – Tianlei Sun

October 30, 2017 @ 1:00 pm - 3:00 pm

TITLE: Unconventional Thermoelectric Generator and Stretchable Organic Semiconductor ADVISOR:  Dr. Brendan O'Connor DATE & TIME: Monday, October 30, 2017 at 1 PM LOCATION: EB3 - 3235   ABSTRACT:  The global energy demand to support the modern society has been increasing rapidly along with the economic development. Increasing the energy usage efficiency is a promising approach to solve the global resources scarcity problem. Thermoelectric generator (TEG) offer a route to reuse the waste heat being generated. The first part of this work focus on developing the easy fabrication…

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MAE PhD Defense – Dingjie Suo

October 31, 2017 @ 9:00 am - 11:00 am

TITLE: High Intensity Focused Ultrasound (HIFU) based thrombolysis using multiple frequency excitations ADVISOR: Dr. Yun Jing DATE & TIME:  Tuesday, October 31, 2017 at 9 AM LOCATION: EB3 - 3235   ABSTRACT:  High intensity focused ultrasound (HIFU) based thrombolysis has emerged as a promising drug-free treatment approach for ischemic stroke. The large amount of acoustic power required by this approach, however, poses a critical challenge to the future clinical translation. This research introduces multi-frequency acoustic waves at MHz range as HIFU excitations to…

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November 2017

MAE PhD Defense – Jialin Lou

November 21, 2017 @ 9:00 am - 11:00 am

TITLE: Development and Implementation of Reconstructed Discontinuous Galerkin Methods for Computational Fluid Dynamics on GPUs ADVISOR: Dr. Hong Luo DATE & TIME: Tuesday, November 21, 2017 at 9:00 AM LOCATION: EB3 - 3235   ABSTRACT: The objective of the effort presented in this Ph.D. work is to port an unstructured CFD solver, reconstructed discontinuous Galerkin flow solver (RDGFLO), onto GPU platform based on OpenACC. The solver is based on a third-order hierarchical Weighted Essentially Non-Oscillatory (WENO) reconstructed DG methods.  By taking advantages…

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December 2017

MAE PhD Defense – Chad Rollins

December 12, 2017 @ 12:00 pm - 2:00 pm

TITLE: Development of Multiphase Computational Fluid Dynamics Solver Testing Platform in OpenFOAM ADVISOR: Dr. Hong Luo DATE: Tuesday, December 12, 2017 at 12 PM LOCATION: EB3 - 3235   ABSTRACT: The basic motivation for this work is based on the desire to construct a modular testing framework and to conduct preliminary validation on that framework. The modular testing frame is required because it gives the users and developers the ability to evaluate and potentially improve the current strategies for CFD modeling of two-phase…

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MAE PhD Defense – Opeoluwa Owoyele

December 20, 2017 @ 9:00 am - 11:00 am

TITLE: Accelerating the Simulation of Chemically Reacting Turbulent Flows via Machine Learning Techniques ADVISOR: Dr. Tarek Echekki DATE & TIME: Wednesday, December 20, 2017 at 9 AM LOCATION: EB3 - 3235   ABSTRACT: Turbulent reacting flows are one of the most complex class of engineering problems, because in addition to the chaotic process of turbulence, they involve stiff and highly nonlinear chemical kinetics. The presence of a large number of species as well as a large range of scales in space and time make direct…

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July 2018

MAE PhD Defense – Daniel McFarland

July 30, 2018 @ 1:00 pm - 3:00 pm

TITLE: Spatial Dependency of Muscular and Joint Loading During Dynamic Submaximal Pushing and Pulling ADVISOR: Dr. Katherine Saul DATE & TIME: Monday, July 30, 2018 at 1 PM LOCATION: EB3 - 3235   ABSTRACT:  This dissertation evaluates how workspace design impacts muscular demand and joint loading during dynamic submaximal push-pull tasks. Work involving extensive pushing and pulling is associated with higher frequency of shoulder complaints. While reports of shoulder muscle demand during submaximal isometric tasks are abundant, dynamic submaximal push-pull exertions…

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August 2018

MAE PhD Defense – Aditya K Pandare

August 13, 2018 @ 10:00 am - 12:00 pm

TITLE: A robust and efficient finite volume method for compressible turbulent two-phase flows at all speeds on unstructured grids ADVISOR: Dr. Hong Luo DATE & TIME: Monday, August 13, 2018 at 10 AM LOCATION: EB3 - 3235   ABSTRACT:  A robust and efficient density-based finite volume method is developed for solving the six-equation single pressure system of two-phase flows at all speeds on hybrid unstructured grids. This work focuses on computation of two-phase flows in severely shocked conditions, where interactions of strong shockwaves and…

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MAE PhD Defense – Felipe Robles Poblete

August 17, 2018 @ 10:00 am - 12:00 pm

TITLE: Rate-dependent Interfacial Mechanics in Advanced Material Systems ADVISOR: Dr. Yong Zhu DATE & TIME: Friday, August 17, 2018 at 10 AM LOCATION: EB3 - 3235   ABSTRACT:  An important branch of applied mechanics involves the category of problems which examines the mechanical behavior of contact regions. There are an extensive number of engineering applications that require one material to be bonded to another. Examples of these applications include adhesive joints, composite materials, protective coatings, and thin films used in the fabrication of microelectronics…

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November 2018

MAE PhD Defense- Punnag Chatterjee

November 5, 2018 @ 9:30 am - 11:30 am

TITLE: Integrated Structures for Multisource Ambient Energy Harvesting ADVISOR: Dr. Matthew Bryant DATE: November 5, 2018 TIME: 9:30am LOCATION: EB3, Rm. #3235   ABSTRACT: Energy harvesting from multiple sources ensures a continuous generation of electrical power, especially when one of the ambient sources is intermittently available. A multifunctional, tension modulated, doubly clamped wind-solar energy harvesting concept is proposed and analytically modeled to investigate the effects of tension modulation. A proof of concept energy harvester is fabricated and experimentally investigated to showcase its…

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December 2018

MA PhD Defense- ArunVishnu SureshBabu

December 4, 2018 @ 3:00 pm - 5:00 pm

Title: Reduced-Order Discrete-Vortex Method for Unsteady Airfoils With Wake Encounter Advisor: Dr. Ashok Gopalarathnam Date: Tuesday, December 4, 2018 Time & Location: 3 PM in EBIII Rm. # 3235   Abstract: This research focuses on developing a fast low-order theoretical method for predicting unsteady airfoil aerodynamics. The method is coupled with a structural model to study limit cycle oscillations in aeroelastic systems. The theory is also augmented using information from experiments to model the influence of upstream wakes on a downstream unsteady airfoil.…

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January 2019

PhD Defense – Zheng Cui

January 3, 2019 @ 2:00 pm - 4:00 pm

TITLE: Silver Nanowire-based Flexible and Stretchable Devices: Applications and Manufacturing ADVISOR: Dr. Yong Zhu DATE: January 3, 2019 TIME & LOCATION: 2 PM in EB3 Rm. 3235   ABSTRACT: The focus of this study is using silver nanowire (AgNW) as functional material to develop flexible and stretchable electronics for wearable applications. The applications of the wearable sensors towards touch-input and health signal monitoring are investigated. A novel AgNW patterning technique with Electrohydrodynamic printing is developed to directly print functional AgNW…

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PhD Defense – Chengjun Li

January 4, 2019 @ 9:30 am - 11:30 am

TITLE: Development of Microelectromechanical Systems for Advanced Nanomechanical Characterization ADVISOR: Dr. Yong Zhu DATE: January 4, 2019 TIME & LOCATION: 9:30 AM in EB3 Rm. 3235   ABSTRACT: The nanostructures such as nanoparticles, nanowires (NWs), nanotubes and graphene are important building blocks for a broad spectrum of nanotechnology applications including energy harvesting and storage, nanoelectromechanical systems (NEMS), flexible electronics and stretchable electronics, where the ultrahigh strength is of direct relevance. Therefore, it is of important to accurately characterize their mechanical…

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August 2019

MAE PhD Defense – Ismail Mohamed

August 1, 2019 @ 10:00 am - 12:00 pm

Title: Modeling the Large Strain Deformation and Nonlinear Fracture Modes of Hydrided Zirconium Alloys Advisor: Dr. Mohammed Zikry Location: EB3 - 3235   Abstract: A dislocation-density based multiple slip crystalline plasticity formulation that accounts for the hexagonal close packed zirconium alloy (h.c.p.) and d (f.c.c.) and e (b.c.c.) hydride systems and orientation relationships (ORs) have been developed to investigate large inelastic deformation and failure modes, such as quasi-static and crack nucleation and propagation for different thermomechanical loading conditions. This predictive…

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