During crack propagation complex patterns can be observed. Using a phase field model of crack propagation we study under what conditions these pattern arise in order to better understand experimental results.
We have for instance studied the shape of unstable crack propagating at high velocities or the shape of crack front propagating under mixed mode (I+III).
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Images of the crack surface (iso surface φ=0.5) taken from simuulations of fast ccrack propagation (branching) and of crack under mixed mode loading (I+III) leading to crack front fragmentation. |
References
[1]H. Henry Crack front instabilities under mixed mode loading in three dimensions EPL (Europhysics Letters), Volume 114, Number 6 Europhysics Letters ou Arxiv open access
[2]H. Henry, M. Adda-Bedia Fractographic aspects of crack branching instability using a phase field model Phys. Rev. E 88, 060401(R) (2013) Physical Review E ou
Arxiv open access