Energy release rate of hyperelastic solids with a nanocrack

GH Lee and CY Cui and HG Beom, PHILOSOPHICAL MAGAZINE LETTERS, 100, 425-434 (2020).

DOI: 10.1080/09500839.2020.1784480

The purpose of this study is to explore the hyperelastic effect on the energy release rate of a crack extension at the nanoscale. A molecular statics computation has been carried out to characterise the atomistic nature of fracturing. The concept of theJ-integral is employed to measure the energy release rate for Ni and Si single crystals having a hyperelastic nature. The obtainedJ-integral is compared to the energy release rates predicted using the two-specimen method and the finite- element method. The results show that the effect of the highly-localized nonlinear zone in front of the crack tip potentially induces a breakdown of the linear elastic fracture mechanics model.

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