Fig. 11

Variation curves of \(N_{{\text{c}}}\) with H/B under different conditions ((a) \(h_{{\text{p}}}\) = 0.0 \(C_{{\text{u}}}\); (b) \(h_{{\text{p}}}\) = 0.5 \(C_{{\text{u}}}\); (c) \(h_{{\text{p}}}\) = 1.0 \(C_{{\text{u}}}\); (d) \(h_{{\text{p}}}\) = 1.5 \(C_{{\text{u}}}\); (e) \(h_{{\text{p}}}\) = 2.0 \(C_{{\text{u}}}\)).