The crack growth and expansion characteristics of Fe and Ni using quasi-continuum method
R.-Z. Qiu, Y.-C. Lin, T.-H. Fang and L.-R. Tsai 
Materials Research Express, 4, 035019 (2017).

ABSTRACT
The crack growth and expansion characteristics of Fe and Ni were studied using
the quasi-continuum approach based on the embedded atom method (EAM) potential.
The crack growth and expansion characteristics of Fe and Ni were evaluated in
terms of atomic stress fields and stress intensity factors. The simulation
results showed that the strength of Fe and Ni obviously decreased with
increasing crack length. However, at the same strain, the crack growth and
expansion of Fe and Ni did not vary upon increasing the crack angle. Moreover,
in cases with the same orientation I, it was found that Fe is more easily broken
than Ni, but for cases with orientation II, the opposite was found.