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Fracture Properties of Surface Modification Layers Via a Modified Bi-Layer Beam Model

  • H. T. Liu (a1), M. H. Zhao (a1) (a2) and J. W. Zhang (a1)


A modified bi-layer beam model is proposed to study the fracture-dominated scratch process of the brittle material with surface modification layer considering residual stress. The nonlinear analytical solution of the energy release rate is derived considering the graded distribution of the elastic modulus and residual stress. Finite element analysis is also conducted. Both analytical and numerical results show that the graded distribution of the material properties and residual stress plays an important role in the fracture process. Based on the inverse analysis, the proposed model could provide a convenient way to determine the energy release rate of materials possessing a surface modification layer.


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