Energy release rate of hyperelastic solids with a nanocrack

摘要

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.