Fracture and adhesion of super-nanomaterials: graphene (the strongest) and spider-silk (the toughest)

摘要: In this Plenary Lecture we will present our recent results on the fracture and adhesion of 4 supernanomaterials: (i) Graphene, that is strongest, for which briefly discuss role defects strength (by applying Quantized Fracture Mechanics [1-3], later called by other Authors also Finite Mechanics; it represents energetic counterpart stress-based approach proposed famous Russian School) Nanoscrolls, as have investigated in a series papers collaboration with H. Gao coworkers, e.g. [4, 5] (we consider collapsed nanotubes graphene cables [6]). (ii) Spider silk, toughest, mechanics, including flaw tolerance, related implications entire web, recently M. Buehler [7, 8]. (iii) Gecko foot, most adhesive, crucial new Theory Multiple Peeling [9] understanding smart adhesion. (iv) Lotus leaf, anti-adhesive, hierarchical topology [10] order to activate fakir drops thus super-hydrophobic behavior. All models are wrong but some useful (George Box).