Modeling the Temperature Rise at the Tip of a Fast Crack.

摘要

Temperature changes that take place ahead of a crack tip in the plastic zone have been analyzed using dislocation modeling of the plastic zone. The development of the process zone and that of the plastic zone is described in terms of dislocation generation and their movement at high strain rates of deformation. Among the various terms contributing to the total energy, the energy dissipation terms have been identified. In particular, the plastic work dissipation rate has been calculated using the phonon viscous drag forces acting on the dislocations. In our analysis, the transition from the heavily deformed process zone to the less heavily deformed plastic zone is gradual and continuous. (JES)