Notch Effect of Materials: Strengthening or Weakening?
Qu Ruitao, Zhang Peng, Zhang Zhefeng*
Fig. 1. a Illustrations of a simple stress–strain curve with linear-hardening behavior and the corresponding mechanical property parameters. b Comparison of tensile static toughness and fracture toughness of various different materials. The relevant data were collected from Refs. [17] , [19] , [20] , [21] , [22] , [23] , [24] , [25] , [26] , [27] and [28] and the tensile static toughness were approximately calculated according to Eq.1.