• Recent Updates

• PhD Thesis Proposal.

Plan to do thesis proposal at 2:30 PM on Nov 11, 2014 in room ERC490.

• Join in Prof. Oswald Research Laboratory.

Officially started as a research assistant at Arizona State University. Primary research will involve application of extended finite element method (XFEM).

• Research interest

 
Development of robust and adaptive algorithms in the framework of extended finite element method(XFEM) to model highly inhomogeneous materials in order to study the effect of material microstructure on properties such as strength, toughness, and dynamic performance such as shock absorption.

• Current Research

 

• Efficient Methods for Implicit Geometrical Representation

Two methods are developed for initializing level set fields on adaptively-refined finite element meshes to represent complex material microstructures from segmented X-ray tomographic data.

Implicit geometry showing Fe-rich inclusions (yellow) and Si-rich inclusions (red).

• 3D Geometry Segmentation

An efficient C++ based library is developing to automatically locate and segment narrow connecting regions that are spuriously introduced by the resolution limits of X-ray tomography.

Geometry segmentation of combined clusters.

• Application of Extended Finite Element Methods (XFEM)

New XFEM algorithms are developed and applied for highly heterogeneous materials to automate the simulation of experiments to better understand, elucidate and predict the experimental results.



Enrichment functions for strong
and weak discontinuities
Stress field around an
inclusion with a refined mesh.
3D XFEM model of stress concentrations near particle inclusions in an aluminum alloy.

• Diverged Crack Propagation in Hydraulic Fracturing

Hydraulic fracturing is a mining technique in which rock is fractured by hydraulically pressurized liquid. A C++ based library is developing to simulate diverged crack propagation in hydraulic fracturing. The bottom video shows axial stress along with crack propagation.