| Citation | He has been a dominant figure in solid mechanics and materials engineering for over 40 years, more highly cited than any other researcher in this area. His early work on the buckling of structures (elastic and plastic) remains influential to this day. He was one of the major developers of nonlinear fracture mechanics. He has made seminal contributions in micromechanics, including plasticity of polycrystals, cracking of fibre-reinforced ceramics and delamination of thermal barrier coatings. Concern for plastic deformation at the scale of microns led to his publications in straingradient plasticity which sparked a world-wide explosion in research on this topic. |