(a) (b)
Figure 6. Load-line displacement versus number of cycles from experiment and FE analysis: (a) specimen 1 and (b) specimen 3 and 5.
4.2 Plastic and Creep Zone Sizes
The effect of creep-fatigue loading conditions (the load ratio Rand the hold time th ) on the plastic and creep zone sizes at the crack initiation (Δa = 0 mm) and growth (Δa = 2 mm) is presented in this sub-section. The regions for showing the plastic and creep zone are shown in Fig. 7.