Aerospace structures, structural dynamics, composite materials, finite elements, transonic aeroelasticity, wind and earthquake structural engineering, and intelligent manufacturing systems. He has authored or co-authored more than 190 articles for scientific journals, as well as a widely used textbook on finite element structural analysis. He has guided 55 Ph.D. and 23 M.S. recipients. He continues to teach an undergraduate course every year, and is currently guiding one Ph.D. student.
