Abstract
Two-dimension spring square network model involving the nearest and second neighbour bonds is studied by numerical simulation with Gauss–Seidel iteration for brittle fracture Mode I. The material-dependent parameter, G 0/ G, is introduced in this simulation, G and G 0 are the parameters related to the elastic moduli of the nearest and second neighbour bonds, respectively. Brittle fracture of materials with different G 0/ G are simulated under the same quenched disorder. The fractal dimension of crack fluctuates with G 0/ G. It seems that it is impossible for different materials to have a universal fractal dimension of crack in brittle fracture. However, it is possible to have different so-called universal fractal dimensions.
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