Study of the branching instability using a phase field model of inplane crack propagation

Details Study of the branching instability using a phase field model of inplane crack propagation Study of the branching instability using a phase field model of inplane crack propagation

2008-04-29

arxiv.org/abs/0804.4600v1

Europhysics Letters vol:83 p:160004 (2008)

Physics

Condensed Matter

Materials Science

Scientific paper

10.1209/0295-5075/83/16004

In this study, the phase field model of crack propagation is used to study the dynamic branching instability in the case of inplane loading in two dimensions. Simulation results are in good agreement with theoretical predictions and experimental findings. Namely, the critical speed at which the instability starts is about $0.48 c_s$. They also show that a full 3D approach is needed to fully understand the branching instability. The finite interface effects are found to be neglectable in the large system size limit even though they are stronger than the one expected from a simple one dimensional calculation.

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