When solids are subjected to high strain rates, deformation and mechanical energy tend to localize through a variety of mechanisms, including adiabatic shear banding (ASB). …
High-density polyethylene (HDPE) is a widely used thermoplastic polymer with application as the material for pipeline transport systems. Due to the longterm, low-stress conditions of …
We discover a new, curvature-localizing, subcritical buckling mode that produces a shallow-kink configuration in multi-layer graphene. Our density functional theory (DFT) analysis reveals the mode …
Mechanical integrity of solid electrolyte interphase (SEI) plays an important role in determining the long-term reliability and performance of advanced high capacity anode materials. Failure …
Predicting crack patterns and toughness of structural biomaterials (SBs) is a complex problem due to their complicated microstructures. Most SBs are heterogeneous in nature and …
In this thesis, we studied the dynamic toughening mechanisms of a hierarchically nanostructured copolymer, polyurea. We first quantitively measured the dynamic fracture toughness as well …
Foams are widely used for impact protection. In order to utilize foams to their full potential a predictive model for their time-dependent mechanical deformation is …
Pressure-shear plate impact (PSPI) experiments have been performed on a polymer- bonded energetic material simulant and its constituents – a simulant crystal sucrose and an …
Structural integrity is essential for critical load bearing structures such as pipelines. Accurate characterization of hidden flaws, theoretical modeling of structural materials, and novel computational …
Mechanical degradation in electrodes could play important roles in the cycle lifetime of lithium-ion batteries. In this thesis, we analyze several mechanical degradation mechanisms in …
Stiff biological materials (SBMs), such as nacre and bone, are composites that display remarkable toughness enhancements over their primary constituents, which are brittle minerals. The …
Adhesion originated from van der Waals interactions becomes predominant over bulk properties of elastic solids at small length scales. A fundamental understanding of the mechanics …
Metallic alloys including high strength steels, refractory alloys, metallic glasses, and high entropy alloys have attracted great research interests in the past decade due to …
Sn, which offers large theoretical capacity (994 mAh/g), is a potentially useful anode material in lithium-ion batteries. However, Sn exhibits irreversible capacity loss through mechanical …
A cylindrical bilayer cavity (CBC) system consisting of a stiff film on a cylindrical cavity surface in an infinite medium has potential in both biological …
This dissertation presents a comprehensive, systematic investigation of methods and applications of scientific machine learning (SciML) in mechanics and their broader implications for interdisciplinary research. …
Abstract of Study on Applications of Ruga Structures in Nano-Architectures, by Siyuan Song, Ph.D., Brown University, May 2023 Ruga is the corrugated configuration appearing on …
In 1959, physicist Richard Feynman gave a historical lecture: `There's Plenty of Room at the Bottom'. Even after sixty years, the exciting field of nanotechnology …