Rheology of glassy materials

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Nonlinear transport phenomena of glassy materials(especially the rheological behaviors) have been theoretically investigated. The main results are as follows.(i) Using molecular dynamics simulations, we for the first time showed clear evidence for the mesosocpic nature of the anomalous viscous transport and viscoelasticity in a supercooled liquid. Our finding strongly suggests that the correlated structure associated with dynamic heterogeneity is of fundamental importance in the slow dynamics of supercooled liquids.(ii) A novel viscoelastic model of fracture of amorphous materials was provided. On the basis of this model, we demonstrated that nonlinear behavior associated with fracture can be a consequence of the dynamic coupling between density fluctuations and deformation fields.