His earlier research work between 1985 and 1996 focused on developing accurate, efficient and powerful numerical methods for mechanical analyses of plate and shell structures made from fibre-reinforced laminated composite materials. The mechanical problems include: (1) hyper-sonic aero-dynamic flutter, (2) parametric resonance, (3) impact response, (4) vibration and vibration control, (5) buckling, post-buckling, failure, etc. Since 1996 his major research interests have been focused on the mechanics of fracture and delamination in layered composite materials. Since 2008 in particular his research interests have been attracted to (1) mixed-mode-fracture partition theory for interface fractures and (2) the mechanics of spontaneous formation and spallation of various thin film blisters of thickness ranging from micro-meters to nano-meters. World leading breakthroughs have been achieved in both areas.