Structural evolution model of damage accumulation processes in modern metallic and polymer nanomaterials

The complex evolution and hierarchical approach to the modeling of the heterogeneous viscous-plastic damaging media fracture process were considered. The model of stochastic crack growth in presence of other defects discussed here allows one to address the process of crack propagation on the basis of microdefects nucleation mechanism, the small cracks growth and coalescence under the external stress and hydrogen effect. Macroscopic model based on the deterministic approach simulates the damage accumulation process and fracture of metal during the hydrogen induced delayed fracture. We also model damage accumulation up to the critical state of a material. Statistical parameters can be estimated experimentally, by the optical and electronic probes, by fractography and by the scanning tunneling "in situ" microscopy methods. Applications to modeling of hot tearing of an aluminum alloy during the solidification process are discussed.