Our research focuses are to understand fundamental mechanisms that determine the mechanical and thermal properties of materials across multiple scales, and to apply the understanding to the design of reliable and efficient materials, structures, and devices.
We combine the density functional theory (DFT) calculations, classical molecular dynamics simulations, and continuum FEM methods with micromechanics theory and wetting theory to understand the mechanism governing the materials' mechanical & other physical properties across multiple length and time scales. By combining such fundamental theories and modeling methods with machine learning theory, we aim to design materials & devices with desired properties.
Focus 1: Revealing governing mechanisms at atomic-to-continuum scale
Based on the fundamental understanding of the governing atomistic mechanisms of plasticity, we aim to enhance the ductility of Titanium alloys by appropriate impurity addition and the ductility of metallic glass by irradiation damage. Utilizing high strength of graphene with its inherent low adhesion with other materials, we study how graphene layers toughen polymer composites, and increase fatigue-resistance and irradiation-resistance of metal composites.
Focus 2: Design/optimize complex composites & surfaces based on fundamental theory and machine learning technique
We study how to optimize the structure of 3d-printed composites for superior stiffness, toughness, and strength by combining the fracture simulation and machine learning techniques. We pursue fundamental understanding on the wetting phenomena by combining theory and numerical simulations, and aim to design a waterproof surface or an effective water condensing surface.
Focus 3: Application of fundamental theory to technologically/industrially timely important problems
By extending the micromechanics theory to thermolelectric equations and materials with low symmetry matrices, we investigate a new way to design thermoelectric composites and devices. We also work on extending the micromechanics theory to nonlinear & large deformation regime, in order to design highly stretchable polymer composites for the use of next generation sensors and electrodes.