Fig. 13

Curves of \(N_{{\text{c}}}\) versus \(h_{{\text{p}}} /C_{{\text{u}}}\) under different conditions ((a) \(\beta\) = 0°, (b) \(\beta\) = 30°, (c) \(\beta\) = 45°, (d) \(\beta\) = 60°, (e) \(\beta\) = 90°).
Curves of \(N_{{\text{c}}}\) versus \(h_{{\text{p}}} /C_{{\text{u}}}\) under different conditions ((a) \(\beta\) = 0°, (b) \(\beta\) = 30°, (c) \(\beta\) = 45°, (d) \(\beta\) = 60°, (e) \(\beta\) = 90°).