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断裂表面能在断裂韧性中起重要作用。G_c≈2γ_p=2γ_5F(x),其中F(x)为位错有关函数。 Caglioti等(1975)提出的点阵动力学模型把断裂表面能γ_5视为两部份所组成,即γ_1(晶体到熔化)和γ_2(液体到沸腾)。其中
Fracture surface can play an important role in fracture toughness. G_c ≈ 2γ_p = 2γ_5F (x), where F (x) is a dislocation related function. The lattice dynamics model proposed by Caglioti et al. (1975) treats the fracture surface energy γ_5 as two components, γ_1 (crystal to melt) and γ_2 (liquid to boiling). among them