Research
Main Research Fields
Containment building from a pressurized water reactor
(NRC drawing)
Characterization of brittle and quasi-brittle materials
A few research interests:
Radiation-induced damage in NPP components.
Multiphysics processes in materials and coupling effects.
Long-term stochastic predictions.
Modeling, implementation, and validation with experiments.
Heat flux entering and leaving a solid surface through a boundary layer
(Hsu 1986)
Constitutive Modeling and Design of Innovative Materials
A few research interests:
Energy-related materials.
Carbon sink and low-carbon building materials.
Innovative sustainable materials.
Mechanical and hygro-thermal properties.
Cellular automata simulation of cement hydration in CEMHYD3D (Pathirage 2019)
Transport Phenomena in Porous Media
A few research interests:
Modeling of chemo-physical reactions in porous media.
Self-healing process.
Carbon sequestration and phase-change.
Fluid-structure interaction.
Discrete modeling of splitting failure in granular materials (Pathirage 2020)
Finite Elements and Discrete Modeling
A few research interests:
Domain discretization and topology.
Time-integration schemes.
Computational speed-up techniques.
Advanced numerical methods.
Small-scale yielding vs exact linear elastic solutions (Unger 1995)
Nonlinear Fracture Mechanics
A few research interests:
Fracture mechanics of brittle and quasi-brittle materials.
Mathematical formulations and closed-form or numerical solutions.
Size-effects.
Delamination problems and cohesive modeling.
Approximate ellipsoidal confidence contours (Draper and Smith 1998)
Statistics, Uncertainty Quantification, and Artificial Intelligence
A few research interests:
Inverse analysis.
Nonlinear regression and uncertainty quantification.
Stochastic analysis and predictions.
Machine learning and reduced-order modeling.
