A semi-empirical fracture model for silicon cleavage fracture and its molecular dynamics study

QY Liu and J Zhou and JD Bao and YW Zhao and LC Xiong and TL Shi and YH Long, THEORETICAL AND APPLIED FRACTURE MECHANICS, 100, 86-92 (2019).

DOI: 10.1016/j.tafmec.2018.12.007

In micro scale, the capability of conventional fracture models is limited due to lacking of micro scale information. In this work, by incorporating crystal information and equivalent transformation, a semi- empirical fracture model for silicon single crystal is constructed. To verify the semi-empirical model, the fracture process is tested by molecular dynamics simulations and theoretical values. The result shows a good agreement between the semi-empirical fracture model and molecular dynamics simulations. And the fracture stresses and fracture toughness can be easily predicated by this model. It provides a link between micro and macro scale fracture for brittle material. And after the equivalent transformation, the fracture of brittle material can be calculated by this semi-empirical model without using conventional crack related parameters.

Return to Publications page