LAUSR

Abstract 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.