fig6

Figure 6. The system energy evolution of FCC Al with a marginal crack under Mode I loading conditions. (A) The system energy evolution; (B) Variations in growth rate of the system energy; (C) Variations in system energy dissipation during emission of different dislocations at the crack tips; and (D) Variations of system energy releasing rate and potential barrier of dislocation nucleation at the crack tips with respect to stress intensity factor. FCC: Faced-centered cubic.