Mohammed Alnaggar

Senior Research Scientist, Oak Ridge National Laboratory

The nation's deteriorating infrastructures are the core subject of Dr. Alnaggar's research. His experience covers a wide range of research topics spanning from detailed material constitutive modeling to large structural scale applications that include: meso-scale and macro-scale modeling of quasi-brittle materials, physical and chemical modeling of aging and deterioration effects on materials including shrinkage, creep, thermal and Alkali-Silica reaction effects, fracture mechanics, continuum mechanics, nonlinear constitutive modeling of materials, analysis of cable supported structures and high rise buildings, neural networks, control of structures, and automatic parameter identification. Dr. Alnaggar is mainly interested in the aging and deterioration of concrete material and infrastructures. His research combines state of the art physics-based constitutive models that simulate the effects of a multitude of physical and chemo-physical phenomena on concrete aging and deterioration. He applies state of the art physics-based computational mechanics techniques to model aging and deterioration both at the fine mesoscale and macroscopic scale using both discrete and continuum models. His recently-published paper on alkali silica reaction has drawn considerable attention in the technical community and enabled collaboration in multiple projects within and outside his CEE department at Northwestern University, where he got his PhD.