To relate the mechanical responses of hard-soft copolymer systems with their microstructures, a coarse-grained molecular dynamics (CGMD) approach is employed. With the generic bead-spring polymer model mapped from atomistic simulations, this dissertation first studies the morphology of structures with various hard-soft compositions and interactions between hard beads. Following that, this...
As opposed to the nanoscale deposition techniques often used for material syntheses, here, I focus on mesoscale material depositions and how to design interfaces to efficiently manage such deposition and potential accumulation. These deposition processes include condensation, condensation frosting, particle capture, and vaporization. Through the lens of energy and sustainability,...
Controlled delivery of foreign cargo into cells is a critical step in many biological studies and in cell engineering and analysis workflows. Recent advances in micro and nanotechnology, specifically in microfluidics and microfabrication have added significantly to the precision, accuracy, resolution and throughput of cell manipulation and analysis pipelines. These...
Integrated Computational Materials Engineering (ICME) has emerged as a transformative paradigm that enables the co-design of products, materials, and their manufacturing processes. A gamut of computational tools, such as manufacturing process simulations and multiscale materials analyses, have been developed henceforth by their respective research communities. However, it remains challenging to...
The presence of unwanted biofilms on surfaces is a great concern for industrial, naval, and healthcare fields, and many other settings. To better inhibit, remove, or harness the properties of biofilms, an explanation of how specific structural or chemical features of biofilm matrix components leads to enhanced adhesion and persistence...
Flowing granular mixtures with species differing in some property, such as size, shape or density of the grains, tend to segregate (de-mix) during flow. Since flowing granular materials are common in industry, and since segregation is often unwanted and costly, understanding and mitigating segregation is an important concern in industrial...
Flexible sheet metal forming processes possess significant potential in today’s industrial goods market with the advent of the next generation manufacturing paradigm, which put stresses on products customization and cost efficiency. However, due to the unique tooling configurations and forming mechanisms adopted in different flexible sheet metal forming processes, there...
Increasingly high global energy consumption demands effective approaches to high energy efficiency and, at the same time, paths to reduced release of carbon dioxide, a primary greenhouse gas behind global climate change. Friction reduction is a vital aspect towards making energy systems more efficient and one of the most crucial...
The viscoelastic properties of microbial biofilms have attracted great interests in recent years due to the ubiquity of biofilms and their wide range of industrial and municipal applications causing tremendous societal impacts. Biofilms are predominantly architected by extracellular polymeric substances (EPS) matrices composed of bacterial cells and biopolymers secreted by...
Although flowing granular materials have been formally studied for over two hundred years, their behavior is still poorly understood relative to fluids, solids, and gases. Sheared granular materials with differing particle properties (e.g., size, density, shape) segregate (de-mix) due to percolation (small particles fall between large ones) and buoyancy (light...